Java Code Examples for org.apache.jasper.compiler.tagplugin.TagPluginContext#generateAttribute()

The following examples show how to use org.apache.jasper.compiler.tagplugin.TagPluginContext#generateAttribute() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: If.java    From Tomcat8-Source-Read with MIT License 6 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    String condV = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("boolean " + condV + "=");
    ctxt.generateAttribute("test");
    ctxt.generateJavaSource(";");
    if (ctxt.isAttributeSpecified("var")) {
        String scope = "PageContext.PAGE_SCOPE";
        if (ctxt.isAttributeSpecified("scope")) {
            String scopeStr = ctxt.getConstantAttribute("scope");
            if ("request".equals(scopeStr)) {
                scope = "PageContext.REQUEST_SCOPE";
            } else if ("session".equals(scopeStr)) {
                scope = "PageContext.SESSION_SCOPE";
            } else if ("application".equals(scopeStr)) {
                scope = "PageContext.APPLICATION_SCOPE";
            }
        }
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", new Boolean(" + condV + ")," + scope + ");");
    }
    ctxt.generateJavaSource("if (" + condV + "){");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 2
Source File: When.java    From tomcatsrc with Apache License 2.0 6 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    // Get the parent context to determine if this is the first <c:when>
    TagPluginContext parentContext = ctxt.getParentContext();
    if (parentContext == null) {
        ctxt.dontUseTagPlugin();
        return;
    }
    
    if ("true".equals(parentContext.getPluginAttribute("hasBeenHere"))) {
        ctxt.generateJavaSource("} else if(");
        // See comment below for the reason we generate the extra "}" here.
    }
    else {
        ctxt.generateJavaSource("if(");
        parentContext.setPluginAttribute("hasBeenHere", "true");
    }
    ctxt.generateAttribute("test");
    ctxt.generateJavaSource("){");
    ctxt.generateBody();
    
    // We don't generate the closing "}" for the "if" here because there
    // may be whitespaces in between <c:when>'s.  Instead we delay
    // generating it until the next <c:when> or <c:otherwise> or
    // <c:choose>
}
 
Example 3
Source File: If.java    From tomcatsrc with Apache License 2.0 6 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    String condV = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("boolean " + condV + "=");
    ctxt.generateAttribute("test");
    ctxt.generateJavaSource(";");
    if (ctxt.isAttributeSpecified("var")) {
        String scope = "PageContext.PAGE_SCOPE";
        if (ctxt.isAttributeSpecified("scope")) {
            String scopeStr = ctxt.getConstantAttribute("scope");
            if ("request".equals(scopeStr)) {
                scope = "PageContext.REQUEST_SCOPE";
            } else if ("session".equals(scopeStr)) {
                scope = "PageContext.SESSION_SCOPE";
            } else if ("application".equals(scopeStr)) {
                scope = "PageContext.APPLICATION_SCOPE";
            }
        }
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", new Boolean(" + condV + ")," + scope + ");");
    }
    ctxt.generateJavaSource("if (" + condV + "){");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 4
Source File: When.java    From Tomcat7.0.67 with Apache License 2.0 6 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    // Get the parent context to determine if this is the first <c:when>
    TagPluginContext parentContext = ctxt.getParentContext();
    if (parentContext == null) {
        ctxt.dontUseTagPlugin();
        return;
    }
    
    if ("true".equals(parentContext.getPluginAttribute("hasBeenHere"))) {
        ctxt.generateJavaSource("} else if(");
        // See comment below for the reason we generate the extra "}" here.
    }
    else {
        ctxt.generateJavaSource("if(");
        parentContext.setPluginAttribute("hasBeenHere", "true");
    }
    ctxt.generateAttribute("test");
    ctxt.generateJavaSource("){");
    ctxt.generateBody();
    
    // We don't generate the closing "}" for the "if" here because there
    // may be whitespaces in between <c:when>'s.  Instead we delay
    // generating it until the next <c:when> or <c:otherwise> or
    // <c:choose>
}
 
Example 5
Source File: If.java    From Tomcat7.0.67 with Apache License 2.0 6 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    String condV = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("boolean " + condV + "=");
    ctxt.generateAttribute("test");
    ctxt.generateJavaSource(";");
    if (ctxt.isAttributeSpecified("var")) {
        String scope = "PageContext.PAGE_SCOPE";
        if (ctxt.isAttributeSpecified("scope")) {
            String scopeStr = ctxt.getConstantAttribute("scope");
            if ("request".equals(scopeStr)) {
                scope = "PageContext.REQUEST_SCOPE";
            } else if ("session".equals(scopeStr)) {
                scope = "PageContext.SESSION_SCOPE";
            } else if ("application".equals(scopeStr)) {
                scope = "PageContext.APPLICATION_SCOPE";
            }
        }
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", new Boolean(" + condV + ")," + scope + ");");
    }
    ctxt.generateJavaSource("if (" + condV + "){");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 6
Source File: Param.java    From tomcatsrc with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //don't support the body content
    
    //define names of all the temp variables
    String nameName = ctxt.getTemporaryVariableName();
    String valueName = ctxt.getTemporaryVariableName();
    String urlName = ctxt.getTemporaryVariableName();
    String encName = ctxt.getTemporaryVariableName();
    String index = ctxt.getTemporaryVariableName();
    
    //if the param tag has no parents, throw a exception
    TagPluginContext parent = ctxt.getParentContext();
    if(parent == null){
        ctxt.generateJavaSource(" throw new JspTagExcption" +
        "(\"&lt;param&gt; outside &lt;import&gt; or &lt;urlEncode&gt;\");");
        return;
    }
    
    //get the url string before adding this param
    ctxt.generateJavaSource("String " + urlName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    
    //get the value of "name"
    ctxt.generateJavaSource("String " + nameName + " = ");
    ctxt.generateAttribute("name");
    ctxt.generateJavaSource(";");
    
    //if the "name" is null then do nothing.
    //else add such string "name=value" to the url.
    //and the url should be encoded
    ctxt.generateJavaSource("if(" + nameName + " != null && !" + nameName + ".equals(\"\")){");
    ctxt.generateJavaSource("    String " + valueName + " = ");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    ctxt.generateJavaSource("    if(" + valueName + " == null) " + valueName + " = \"\";");
    ctxt.generateJavaSource("    String " + encName + " = pageContext.getResponse().getCharacterEncoding();");
    ctxt.generateJavaSource("    " + nameName + " = java.net.URLEncoder.encode(" + nameName + ", " + encName + ");");
    ctxt.generateJavaSource("    " + valueName + " = java.net.URLEncoder.encode(" + valueName + ", " + encName + ");");
    ctxt.generateJavaSource("    int " + index + ";");
    ctxt.generateJavaSource("    " + index + " = " + urlName + ".indexOf(\'?\');");
    //if the current param is the first one, add a "?" ahead of it
    //else add a "&" ahead of it
    ctxt.generateJavaSource("    if(" + index + " == -1){");
    ctxt.generateJavaSource("        " + urlName + " = " + urlName + " + \"?\" + " + nameName + " + \"=\" + " + valueName + ";");
    ctxt.generateJavaSource("    }else{");
    ctxt.generateJavaSource("        " + urlName + " = " + urlName + " + \"&\" + " + nameName + " + \"=\" + " + valueName + ";");
    ctxt.generateJavaSource("    }");
    ctxt.generateJavaSource("    pageContext.setAttribute(\"url_without_param\"," + urlName + ");");
    ctxt.generateJavaSource("}");
}
 
Example 7
Source File: ForTokens.java    From Tomcat8-Source-Read with MIT License 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    boolean hasVar, hasVarStatus, hasBegin, hasEnd, hasStep;

    //init the flags
    hasVar = ctxt.isAttributeSpecified("var");
    hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");

    if(hasVarStatus){
        ctxt.dontUseTagPlugin();
        return;
    }

    //define all the temp variables' names
    String itemsName = ctxt.getTemporaryVariableName();
    String delimsName = ctxt.getTemporaryVariableName();
    String stName = ctxt.getTemporaryVariableName();
    String beginName = ctxt.getTemporaryVariableName();
    String endName  = ctxt.getTemporaryVariableName();
    String stepName = ctxt.getTemporaryVariableName();
    String index = ctxt.getTemporaryVariableName();
    String temp  = ctxt.getTemporaryVariableName();
    String tokensCountName = ctxt.getTemporaryVariableName();

    //get the value of the "items" attribute
    ctxt.generateJavaSource("String " + itemsName + " = (String)");
    ctxt.generateAttribute("items");
    ctxt.generateJavaSource(";");

    //get the value of the "delim" attribute
    ctxt.generateJavaSource("String " + delimsName + " = (String)");
    ctxt.generateAttribute("delims");
    ctxt.generateJavaSource(";");

    //new a StringTokenizer Object according to the "items" and the "delim"
    ctxt.generateJavaSource("java.util.StringTokenizer " + stName + " = " +
            "new java.util.StringTokenizer(" + itemsName + ", " + delimsName + ");");

    //if "begin" specified, move the token to the "begin" place
    //and record the begin index. default begin place is 0.
    ctxt.generateJavaSource("int " + tokensCountName + " = " + stName + ".countTokens();");
    if(hasBegin){
        ctxt.generateJavaSource("int " + beginName + " = "  );
        ctxt.generateAttribute("begin");
        ctxt.generateJavaSource(";");
        ctxt.generateJavaSource("for(int " + index + " = 0; " + index + " < " + beginName + " && " + stName + ".hasMoreTokens(); " + index + "++, " + stName + ".nextToken()){}");
    }else{
        ctxt.generateJavaSource("int " + beginName + " = 0;");
    }

    //when "end" is specified, if the "end" is more than the last index,
    //record the end place as the last index, otherwise, record it as "end";
    //default end place is the last index
    if(hasEnd){
        ctxt.generateJavaSource("int " + endName + " = 0;"  );
        ctxt.generateJavaSource("if((" + tokensCountName + " - 1) < ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource("){");
        ctxt.generateJavaSource("    " + endName + " = " + tokensCountName + " - 1;");
        ctxt.generateJavaSource("}else{");
        ctxt.generateJavaSource("    " + endName + " = ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource(";}");
    }else{
        ctxt.generateJavaSource("int " + endName + " = " + tokensCountName + " - 1;");
    }

    //get the step value from "step" if specified.
    //default step value is 1.
    if(hasStep){
        ctxt.generateJavaSource("int " + stepName + " = "  );
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(";");
    }else{
        ctxt.generateJavaSource("int " + stepName + " = 1;");
    }

    //the loop
    ctxt.generateJavaSource("for(int " + index + " = " + beginName + "; " + index + " <= " + endName + "; " + index + "++){");
    ctxt.generateJavaSource("    String " + temp + " = " + stName + ".nextToken();");
    ctxt.generateJavaSource("    if(((" + index + " - " + beginName + ") % " + stepName + ") == 0){");
    //if var specified, put the current token into the attribute "var" defines.
    if(hasVar){
        String strVar = ctxt.getConstantAttribute("var");
        ctxt.generateJavaSource("        pageContext.setAttribute(\"" + strVar + "\", " + temp + ");");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("    }");
    ctxt.generateJavaSource("}");
}
 
Example 8
Source File: ForEach.java    From tomcatsrc with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    String index = null;
    
    boolean hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    if (hasVarStatus) {
        ctxt.dontUseTagPlugin();
        return;
    }
    
    hasVar = ctxt.isAttributeSpecified("var");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");
    
    boolean hasItems = ctxt.isAttributeSpecified("items");
    if (hasItems) {
        doCollection(ctxt);
        return;
    }
    
    // We must have a begin and end attributes
    index = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("for (int " + index + " = ");
    ctxt.generateAttribute("begin");
    ctxt.generateJavaSource("; " + index + " <= ");
    ctxt.generateAttribute("end");
    if (hasStep) {
        ctxt.generateJavaSource("; " + index + "+=");
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(") {");
    }
    else {
        ctxt.generateJavaSource("; " + index + "++) {");
    }
    
    // If var is specified and the body contains an EL, then sycn
    // the var attribute
    if (hasVar /* && ctxt.hasEL() */) {
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", String.valueOf(" + index + "));");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 9
Source File: ForTokens.java    From tomcatsrc with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    boolean hasVar, hasVarStatus, hasBegin, hasEnd, hasStep;
    
    //init the flags
    hasVar = ctxt.isAttributeSpecified("var");
    hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");
    
    if(hasVarStatus){
        ctxt.dontUseTagPlugin();
        return;
    }
    
    //define all the temp variables' names
    String itemsName = ctxt.getTemporaryVariableName();
    String delimsName = ctxt.getTemporaryVariableName();
    String stName = ctxt.getTemporaryVariableName();
    String beginName = ctxt.getTemporaryVariableName();
    String endName  = ctxt.getTemporaryVariableName();
    String stepName = ctxt.getTemporaryVariableName();
    String index = ctxt.getTemporaryVariableName();
    String temp  = ctxt.getTemporaryVariableName();
    String tokensCountName = ctxt.getTemporaryVariableName();
    
    //get the value of the "items" attribute 
    ctxt.generateJavaSource("String " + itemsName + " = (String)");
    ctxt.generateAttribute("items");
    ctxt.generateJavaSource(";");
    
    //get the value of the "delim" attribute
    ctxt.generateJavaSource("String " + delimsName + " = (String)");
    ctxt.generateAttribute("delims");
    ctxt.generateJavaSource(";");
    
    //new a StringTokenizer Object according to the "items" and the "delim"
    ctxt.generateJavaSource("java.util.StringTokenizer " + stName + " = " +
            "new java.util.StringTokenizer(" + itemsName + ", " + delimsName + ");");
    
    //if "begin" specified, move the token to the "begin" place
    //and record the begin index. default begin place is 0.
    ctxt.generateJavaSource("int " + tokensCountName + " = " + stName + ".countTokens();");
    if(hasBegin){
        ctxt.generateJavaSource("int " + beginName + " = "  );
        ctxt.generateAttribute("begin");
        ctxt.generateJavaSource(";");
        ctxt.generateJavaSource("for(int " + index + " = 0; " + index + " < " + beginName + " && " + stName + ".hasMoreTokens(); " + index + "++, " + stName + ".nextToken()){}");
    }else{
        ctxt.generateJavaSource("int " + beginName + " = 0;");
    }
    
    //when "end" is specified, if the "end" is more than the last index,
    //record the end place as the last index, otherwise, record it as "end";
    //default end place is the last index 
    if(hasEnd){
        ctxt.generateJavaSource("int " + endName + " = 0;"  );
        ctxt.generateJavaSource("if((" + tokensCountName + " - 1) < ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource("){");
        ctxt.generateJavaSource("    " + endName + " = " + tokensCountName + " - 1;");
        ctxt.generateJavaSource("}else{");
        ctxt.generateJavaSource("    " + endName + " = ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource(";}");
    }else{
        ctxt.generateJavaSource("int " + endName + " = " + tokensCountName + " - 1;");
    }
    
    //get the step value from "step" if specified.
    //default step value is 1.
    if(hasStep){
        ctxt.generateJavaSource("int " + stepName + " = "  );
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(";");
    }else{
        ctxt.generateJavaSource("int " + stepName + " = 1;");
    }
    
    //the loop
    ctxt.generateJavaSource("for(int " + index + " = " + beginName + "; " + index + " <= " + endName + "; " + index + "++){");
    ctxt.generateJavaSource("    String " + temp + " = " + stName + ".nextToken();");
    ctxt.generateJavaSource("    if(((" + index + " - " + beginName + ") % " + stepName + ") == 0){");
    //if var specified, put the current token into the attribute "var" defines.
    if(hasVar){
        String strVar = ctxt.getConstantAttribute("var");
        ctxt.generateJavaSource("        pageContext.setAttribute(\"" + strVar + "\", " + temp + ");");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("    }");
    ctxt.generateJavaSource("}");
}
 
Example 10
Source File: Out.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //these two data member are to indicate 
    //whether the corresponding attribute is specified
    boolean hasDefault=false, hasEscapeXml=false;
    hasDefault = ctxt.isAttributeSpecified("default");
    hasEscapeXml = ctxt.isAttributeSpecified("escapeXml");
    
    //strValName, strEscapeXmlName & strDefName are two variables' name 
    //standing for value, escapeXml and default attribute
    String strObjectName = ctxt.getTemporaryVariableName();
    String strValName = ctxt.getTemporaryVariableName();
    String strDefName = ctxt.getTemporaryVariableName();
    String strEscapeXmlName = ctxt.getTemporaryVariableName();
    String strSkipBodyName = ctxt.getTemporaryVariableName();

    //according to the tag file, the value attribute is mandatory.
    ctxt.generateImport("java.io.Reader");
    ctxt.generateJavaSource("Object " + strObjectName + "=");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    ctxt.generateJavaSource("String " + strValName + "=null;");
    ctxt.generateJavaSource("if(!(" + strObjectName +
            " instanceof Reader) && "+ strObjectName + " != null){");
    ctxt.generateJavaSource(
            strValName + " = " + strObjectName + ".toString();");
    ctxt.generateJavaSource("}");
    
    //initiate the strDefName with null.
    //if the default has been specified, then assign the value to it;
    ctxt.generateJavaSource("String " + strDefName + " = null;");
    if(hasDefault){
        ctxt.generateJavaSource("if(");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(" != null){");
        ctxt.generateJavaSource(strDefName + " = (");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(").toString();");
        ctxt.generateJavaSource("}");
    }
    
    //initiate the strEscapeXmlName with true;
    //if the escapeXml is specified, assign the value to it;
    ctxt.generateJavaSource("boolean " + strEscapeXmlName + " = true;");
    if(hasEscapeXml){
        ctxt.generateJavaSource(strEscapeXmlName + " = ");
        ctxt.generateAttribute("escapeXml");
        ctxt.generateJavaSource(";");
    }
    
    //main part. 
    ctxt.generateJavaSource(
            "boolean " + strSkipBodyName + " = " +
            "org.apache.jasper.tagplugins.jstl.core.Out.output(out, " +
            strObjectName + ", " + strValName + ", " + strDefName + ", " +
            strEscapeXmlName + ");");
    ctxt.generateJavaSource("if(!" + strSkipBodyName + ") {");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 11
Source File: Redirect.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //flag for the existence of the "context"
    boolean hasContext = ctxt.isAttributeSpecified("context");
    
    //names of the temp variables
    String urlName = ctxt.getTemporaryVariableName();
    String contextName = ctxt.getTemporaryVariableName();
    String baseUrlName = ctxt.getTemporaryVariableName();
    String resultName = ctxt.getTemporaryVariableName();
    String responseName = ctxt.getTemporaryVariableName();
    
    //get context
    ctxt.generateJavaSource("String " + contextName + " = null;");
    if(hasContext){
        ctxt.generateJavaSource(contextName + " = ");
        ctxt.generateAttribute("context");
        ctxt.generateJavaSource(";");
    }
    
    //get the url
    ctxt.generateJavaSource("String " + urlName + " = ");
    ctxt.generateAttribute("url");
    ctxt.generateJavaSource(";");
    
    //get the raw url according to "url" and "context"
    ctxt.generateJavaSource("String " + baseUrlName + " = " +
            "org.apache.jasper.tagplugins.jstl.Util.resolveUrl(" + urlName + ", " + contextName + ", pageContext);");
    ctxt.generateJavaSource("pageContext.setAttribute" +
            "(\"url_without_param\", " + baseUrlName + ");");
    
    //add params
    ctxt.generateBody();
    
    ctxt.generateJavaSource("String " + resultName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    ctxt.generateJavaSource("pageContext.removeAttribute" +
    "(\"url_without_param\");");
    
    //get the response object
    ctxt.generateJavaSource("HttpServletResponse " + responseName + " = " +
    "((HttpServletResponse) pageContext.getResponse());");
    
    //if the url is relative, encode it
    ctxt.generateJavaSource("if(!org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){");
    ctxt.generateJavaSource("    " + resultName + " = "
            + responseName + ".encodeRedirectURL(" + resultName + ");");
    ctxt.generateJavaSource("}");
    
    //do redirect
    ctxt.generateJavaSource("try{");
    ctxt.generateJavaSource("    " + responseName + ".sendRedirect(" + resultName + ");");
    ctxt.generateJavaSource("}catch(java.io.IOException ex){");
    ctxt.generateJavaSource("    throw new JspTagException(ex.toString(), ex);");
    ctxt.generateJavaSource("}");
}
 
Example 12
Source File: Url.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //flags
    boolean hasVar, hasContext, hasScope;
    
    //init flags
    hasVar = ctxt.isAttributeSpecified("var");
    hasContext = ctxt.isAttributeSpecified("context");
    hasScope = ctxt.isAttributeSpecified("scope");
    
    //define name of the temp variables
    String valueName = ctxt.getTemporaryVariableName();
    String contextName = ctxt.getTemporaryVariableName();
    String baseUrlName = ctxt.getTemporaryVariableName();
    String resultName = ctxt.getTemporaryVariableName();
    String responseName = ctxt.getTemporaryVariableName();
    
    //get the scope
    String strScope = "page";
    if(hasScope){
        strScope = ctxt.getConstantAttribute("scope");
    }
    int iScope = Util.getScope(strScope);
    
    //get the value
    ctxt.generateJavaSource("String " + valueName + " = ");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    
    //get the context
    ctxt.generateJavaSource("String " + contextName + " = null;");
    if(hasContext){
        ctxt.generateJavaSource(contextName + " = ");
        ctxt.generateAttribute("context");
        ctxt.generateJavaSource(";");
    }
    
    //get the raw url
    ctxt.generateJavaSource("String " + baseUrlName + " = " +
            "org.apache.jasper.tagplugins.jstl.Util.resolveUrl(" + valueName + ", " + contextName + ", pageContext);");
    ctxt.generateJavaSource("pageContext.setAttribute" +
            "(\"url_without_param\", " + baseUrlName + ");");
    
    //add params
    ctxt.generateBody();
    
    ctxt.generateJavaSource("String " + resultName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    ctxt.generateJavaSource("pageContext.removeAttribute(\"url_without_param\");");
    
    //if the url is relative, encode it
    ctxt.generateJavaSource("if(!org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){");
    ctxt.generateJavaSource("    HttpServletResponse " + responseName + " = " +
    "((HttpServletResponse) pageContext.getResponse());");
    ctxt.generateJavaSource("    " + resultName + " = "
            + responseName + ".encodeURL(" + resultName + ");");
    ctxt.generateJavaSource("}");
    
    //if "var" is specified, the url string store in the attribute var defines
    if(hasVar){
        String strVar = ctxt.getConstantAttribute("var");
        ctxt.generateJavaSource("pageContext.setAttribute" +
                "(\"" + strVar + "\", " + resultName + ", " + iScope + ");");
        
        //if var is not specified, just print out the url string
    }else{
        ctxt.generateJavaSource("try{");
        ctxt.generateJavaSource("    pageContext.getOut().print(" + resultName + ");");
        ctxt.generateJavaSource("}catch(java.io.IOException ex){");
        ctxt.generateJavaSource("    throw new JspTagException(ex.toString(), ex);");
        ctxt.generateJavaSource("}");
    }
}
 
Example 13
Source File: Param.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //don't support the body content
    
    //define names of all the temp variables
    String nameName = ctxt.getTemporaryVariableName();
    String valueName = ctxt.getTemporaryVariableName();
    String urlName = ctxt.getTemporaryVariableName();
    String encName = ctxt.getTemporaryVariableName();
    String index = ctxt.getTemporaryVariableName();
    
    //if the param tag has no parents, throw a exception
    TagPluginContext parent = ctxt.getParentContext();
    if(parent == null){
        ctxt.generateJavaSource(" throw new JspTagExcption" +
        "(\"&lt;param&gt; outside &lt;import&gt; or &lt;urlEncode&gt;\");");
        return;
    }
    
    //get the url string before adding this param
    ctxt.generateJavaSource("String " + urlName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    
    //get the value of "name"
    ctxt.generateJavaSource("String " + nameName + " = ");
    ctxt.generateAttribute("name");
    ctxt.generateJavaSource(";");
    
    //if the "name" is null then do nothing.
    //else add such string "name=value" to the url.
    //and the url should be encoded
    ctxt.generateJavaSource("if(" + nameName + " != null && !" + nameName + ".equals(\"\")){");
    ctxt.generateJavaSource("    String " + valueName + " = ");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    ctxt.generateJavaSource("    if(" + valueName + " == null) " + valueName + " = \"\";");
    ctxt.generateJavaSource("    String " + encName + " = pageContext.getResponse().getCharacterEncoding();");
    ctxt.generateJavaSource("    " + nameName + " = java.net.URLEncoder.encode(" + nameName + ", " + encName + ");");
    ctxt.generateJavaSource("    " + valueName + " = java.net.URLEncoder.encode(" + valueName + ", " + encName + ");");
    ctxt.generateJavaSource("    int " + index + ";");
    ctxt.generateJavaSource("    " + index + " = " + urlName + ".indexOf(\'?\');");
    //if the current param is the first one, add a "?" ahead of it
    //else add a "&" ahead of it
    ctxt.generateJavaSource("    if(" + index + " == -1){");
    ctxt.generateJavaSource("        " + urlName + " = " + urlName + " + \"?\" + " + nameName + " + \"=\" + " + valueName + ";");
    ctxt.generateJavaSource("    }else{");
    ctxt.generateJavaSource("        " + urlName + " = " + urlName + " + \"&\" + " + nameName + " + \"=\" + " + valueName + ";");
    ctxt.generateJavaSource("    }");
    ctxt.generateJavaSource("    pageContext.setAttribute(\"url_without_param\"," + urlName + ");");
    ctxt.generateJavaSource("}");
}
 
Example 14
Source File: ForEach.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    String index = null;
    
    boolean hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    if (hasVarStatus) {
        ctxt.dontUseTagPlugin();
        return;
    }
    
    hasVar = ctxt.isAttributeSpecified("var");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");
    
    boolean hasItems = ctxt.isAttributeSpecified("items");
    if (hasItems) {
        doCollection(ctxt);
        return;
    }
    
    // We must have a begin and end attributes
    index = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("for (int " + index + " = ");
    ctxt.generateAttribute("begin");
    ctxt.generateJavaSource("; " + index + " <= ");
    ctxt.generateAttribute("end");
    if (hasStep) {
        ctxt.generateJavaSource("; " + index + "+=");
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(") {");
    }
    else {
        ctxt.generateJavaSource("; " + index + "++) {");
    }
    
    // If var is specified and the body contains an EL, then sycn
    // the var attribute
    if (hasVar /* && ctxt.hasEL() */) {
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", String.valueOf(" + index + "));");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 15
Source File: ForTokens.java    From Tomcat7.0.67 with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    boolean hasVar, hasVarStatus, hasBegin, hasEnd, hasStep;
    
    //init the flags
    hasVar = ctxt.isAttributeSpecified("var");
    hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");
    
    if(hasVarStatus){
        ctxt.dontUseTagPlugin();
        return;
    }
    
    //define all the temp variables' names
    String itemsName = ctxt.getTemporaryVariableName();
    String delimsName = ctxt.getTemporaryVariableName();
    String stName = ctxt.getTemporaryVariableName();
    String beginName = ctxt.getTemporaryVariableName();
    String endName  = ctxt.getTemporaryVariableName();
    String stepName = ctxt.getTemporaryVariableName();
    String index = ctxt.getTemporaryVariableName();
    String temp  = ctxt.getTemporaryVariableName();
    String tokensCountName = ctxt.getTemporaryVariableName();
    
    //get the value of the "items" attribute 
    ctxt.generateJavaSource("String " + itemsName + " = (String)");
    ctxt.generateAttribute("items");
    ctxt.generateJavaSource(";");
    
    //get the value of the "delim" attribute
    ctxt.generateJavaSource("String " + delimsName + " = (String)");
    ctxt.generateAttribute("delims");
    ctxt.generateJavaSource(";");
    
    //new a StringTokenizer Object according to the "items" and the "delim"
    ctxt.generateJavaSource("java.util.StringTokenizer " + stName + " = " +
            "new java.util.StringTokenizer(" + itemsName + ", " + delimsName + ");");
    
    //if "begin" specified, move the token to the "begin" place
    //and record the begin index. default begin place is 0.
    ctxt.generateJavaSource("int " + tokensCountName + " = " + stName + ".countTokens();");
    if(hasBegin){
        ctxt.generateJavaSource("int " + beginName + " = "  );
        ctxt.generateAttribute("begin");
        ctxt.generateJavaSource(";");
        ctxt.generateJavaSource("for(int " + index + " = 0; " + index + " < " + beginName + " && " + stName + ".hasMoreTokens(); " + index + "++, " + stName + ".nextToken()){}");
    }else{
        ctxt.generateJavaSource("int " + beginName + " = 0;");
    }
    
    //when "end" is specified, if the "end" is more than the last index,
    //record the end place as the last index, otherwise, record it as "end";
    //default end place is the last index 
    if(hasEnd){
        ctxt.generateJavaSource("int " + endName + " = 0;"  );
        ctxt.generateJavaSource("if((" + tokensCountName + " - 1) < ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource("){");
        ctxt.generateJavaSource("    " + endName + " = " + tokensCountName + " - 1;");
        ctxt.generateJavaSource("}else{");
        ctxt.generateJavaSource("    " + endName + " = ");
        ctxt.generateAttribute("end");
        ctxt.generateJavaSource(";}");
    }else{
        ctxt.generateJavaSource("int " + endName + " = " + tokensCountName + " - 1;");
    }
    
    //get the step value from "step" if specified.
    //default step value is 1.
    if(hasStep){
        ctxt.generateJavaSource("int " + stepName + " = "  );
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(";");
    }else{
        ctxt.generateJavaSource("int " + stepName + " = 1;");
    }
    
    //the loop
    ctxt.generateJavaSource("for(int " + index + " = " + beginName + "; " + index + " <= " + endName + "; " + index + "++){");
    ctxt.generateJavaSource("    String " + temp + " = " + stName + ".nextToken();");
    ctxt.generateJavaSource("    if(((" + index + " - " + beginName + ") % " + stepName + ") == 0){");
    //if var specified, put the current token into the attribute "var" defines.
    if(hasVar){
        String strVar = ctxt.getConstantAttribute("var");
        ctxt.generateJavaSource("        pageContext.setAttribute(\"" + strVar + "\", " + temp + ");");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("    }");
    ctxt.generateJavaSource("}");
}
 
Example 16
Source File: Out.java    From tomcatsrc with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //these two data member are to indicate 
    //whether the corresponding attribute is specified
    boolean hasDefault=false, hasEscapeXml=false;
    hasDefault = ctxt.isAttributeSpecified("default");
    hasEscapeXml = ctxt.isAttributeSpecified("escapeXml");
    
    //strValName, strEscapeXmlName & strDefName are two variables' name 
    //standing for value, escapeXml and default attribute
    String strObjectName = ctxt.getTemporaryVariableName();
    String strValName = ctxt.getTemporaryVariableName();
    String strDefName = ctxt.getTemporaryVariableName();
    String strEscapeXmlName = ctxt.getTemporaryVariableName();
    String strSkipBodyName = ctxt.getTemporaryVariableName();

    //according to the tag file, the value attribute is mandatory.
    ctxt.generateImport("java.io.Reader");
    ctxt.generateJavaSource("Object " + strObjectName + "=");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    ctxt.generateJavaSource("String " + strValName + "=null;");
    ctxt.generateJavaSource("if(!(" + strObjectName +
            " instanceof Reader) && "+ strObjectName + " != null){");
    ctxt.generateJavaSource(
            strValName + " = " + strObjectName + ".toString();");
    ctxt.generateJavaSource("}");
    
    //initiate the strDefName with null.
    //if the default has been specified, then assign the value to it;
    ctxt.generateJavaSource("String " + strDefName + " = null;");
    if(hasDefault){
        ctxt.generateJavaSource("if(");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(" != null){");
        ctxt.generateJavaSource(strDefName + " = (");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(").toString();");
        ctxt.generateJavaSource("}");
    }
    
    //initiate the strEscapeXmlName with true;
    //if the escapeXml is specified, assign the value to it;
    ctxt.generateJavaSource("boolean " + strEscapeXmlName + " = true;");
    if(hasEscapeXml){
        ctxt.generateJavaSource(strEscapeXmlName + " = ");
        ctxt.generateAttribute("escapeXml");
        ctxt.generateJavaSource(";");
    }
    
    //main part. 
    ctxt.generateJavaSource(
            "boolean " + strSkipBodyName + " = " +
            "org.apache.jasper.tagplugins.jstl.core.Out.output(out, " +
            strObjectName + ", " + strValName + ", " + strDefName + ", " +
            strEscapeXmlName + ");");
    ctxt.generateJavaSource("if(!" + strSkipBodyName + ") {");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 17
Source File: Out.java    From Tomcat8-Source-Read with MIT License 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {

    //these two data member are to indicate
    //whether the corresponding attribute is specified
    boolean hasDefault=false, hasEscapeXml=false;
    hasDefault = ctxt.isAttributeSpecified("default");
    hasEscapeXml = ctxt.isAttributeSpecified("escapeXml");

    //strValName, strEscapeXmlName & strDefName are two variables' name
    //standing for value, escapeXml and default attribute
    String strObjectName = ctxt.getTemporaryVariableName();
    String strValName = ctxt.getTemporaryVariableName();
    String strDefName = ctxt.getTemporaryVariableName();
    String strEscapeXmlName = ctxt.getTemporaryVariableName();
    String strSkipBodyName = ctxt.getTemporaryVariableName();

    //according to the tag file, the value attribute is mandatory.
    ctxt.generateImport("java.io.Reader");
    ctxt.generateJavaSource("Object " + strObjectName + "=");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    ctxt.generateJavaSource("String " + strValName + "=null;");
    ctxt.generateJavaSource("if(!(" + strObjectName +
            " instanceof Reader) && "+ strObjectName + " != null){");
    ctxt.generateJavaSource(
            strValName + " = " + strObjectName + ".toString();");
    ctxt.generateJavaSource("}");

    //initiate the strDefName with null.
    //if the default has been specified, then assign the value to it;
    ctxt.generateJavaSource("String " + strDefName + " = null;");
    if(hasDefault){
        ctxt.generateJavaSource("if(");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(" != null){");
        ctxt.generateJavaSource(strDefName + " = (");
        ctxt.generateAttribute("default");
        ctxt.generateJavaSource(").toString();");
        ctxt.generateJavaSource("}");
    }

    //initiate the strEscapeXmlName with true;
    //if the escapeXml is specified, assign the value to it;
    ctxt.generateJavaSource("boolean " + strEscapeXmlName + " = true;");
    if(hasEscapeXml){
        ctxt.generateJavaSource(strEscapeXmlName + " = ");
        ctxt.generateAttribute("escapeXml");
        ctxt.generateJavaSource(";");
    }

    //main part.
    ctxt.generateJavaSource(
            "boolean " + strSkipBodyName + " = " +
            "org.apache.jasper.tagplugins.jstl.core.Out.output(out, " +
            strObjectName + ", " + strValName + ", " + strDefName + ", " +
            strEscapeXmlName + ");");
    ctxt.generateJavaSource("if(!" + strSkipBodyName + ") {");
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}
 
Example 18
Source File: Redirect.java    From Tomcat8-Source-Read with MIT License 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {

    //flag for the existence of the "context"
    boolean hasContext = ctxt.isAttributeSpecified("context");

    //names of the temp variables
    String urlName = ctxt.getTemporaryVariableName();
    String contextName = ctxt.getTemporaryVariableName();
    String baseUrlName = ctxt.getTemporaryVariableName();
    String resultName = ctxt.getTemporaryVariableName();
    String responseName = ctxt.getTemporaryVariableName();

    //get context
    ctxt.generateJavaSource("String " + contextName + " = null;");
    if(hasContext){
        ctxt.generateJavaSource(contextName + " = ");
        ctxt.generateAttribute("context");
        ctxt.generateJavaSource(";");
    }

    //get the url
    ctxt.generateJavaSource("String " + urlName + " = ");
    ctxt.generateAttribute("url");
    ctxt.generateJavaSource(";");

    //get the raw url according to "url" and "context"
    ctxt.generateJavaSource("String " + baseUrlName + " = " +
            "org.apache.jasper.tagplugins.jstl.Util.resolveUrl(" + urlName + ", " + contextName + ", pageContext);");
    ctxt.generateJavaSource("pageContext.setAttribute" +
            "(\"url_without_param\", " + baseUrlName + ");");

    //add params
    ctxt.generateBody();

    ctxt.generateJavaSource("String " + resultName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    ctxt.generateJavaSource("pageContext.removeAttribute" +
    "(\"url_without_param\");");

    //get the response object
    ctxt.generateJavaSource("HttpServletResponse " + responseName + " = " +
    "((HttpServletResponse) pageContext.getResponse());");

    //if the url is relative, encode it
    ctxt.generateJavaSource("if(!org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){");
    ctxt.generateJavaSource("    " + resultName + " = "
            + responseName + ".encodeRedirectURL(" + resultName + ");");
    ctxt.generateJavaSource("}");

    //do redirect
    ctxt.generateJavaSource("try{");
    ctxt.generateJavaSource("    " + responseName + ".sendRedirect(" + resultName + ");");
    ctxt.generateJavaSource("}catch(java.io.IOException ex){");
    ctxt.generateJavaSource("    throw new JspTagException(ex.toString(), ex);");
    ctxt.generateJavaSource("}");
}
 
Example 19
Source File: Url.java    From tomcatsrc with Apache License 2.0 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {
    
    //flags
    boolean hasVar, hasContext, hasScope;
    
    //init flags
    hasVar = ctxt.isAttributeSpecified("var");
    hasContext = ctxt.isAttributeSpecified("context");
    hasScope = ctxt.isAttributeSpecified("scope");
    
    //define name of the temp variables
    String valueName = ctxt.getTemporaryVariableName();
    String contextName = ctxt.getTemporaryVariableName();
    String baseUrlName = ctxt.getTemporaryVariableName();
    String resultName = ctxt.getTemporaryVariableName();
    String responseName = ctxt.getTemporaryVariableName();
    
    //get the scope
    String strScope = "page";
    if(hasScope){
        strScope = ctxt.getConstantAttribute("scope");
    }
    int iScope = Util.getScope(strScope);
    
    //get the value
    ctxt.generateJavaSource("String " + valueName + " = ");
    ctxt.generateAttribute("value");
    ctxt.generateJavaSource(";");
    
    //get the context
    ctxt.generateJavaSource("String " + contextName + " = null;");
    if(hasContext){
        ctxt.generateJavaSource(contextName + " = ");
        ctxt.generateAttribute("context");
        ctxt.generateJavaSource(";");
    }
    
    //get the raw url
    ctxt.generateJavaSource("String " + baseUrlName + " = " +
            "org.apache.jasper.tagplugins.jstl.Util.resolveUrl(" + valueName + ", " + contextName + ", pageContext);");
    ctxt.generateJavaSource("pageContext.setAttribute" +
            "(\"url_without_param\", " + baseUrlName + ");");
    
    //add params
    ctxt.generateBody();
    
    ctxt.generateJavaSource("String " + resultName + " = " +
    "(String)pageContext.getAttribute(\"url_without_param\");");
    ctxt.generateJavaSource("pageContext.removeAttribute(\"url_without_param\");");
    
    //if the url is relative, encode it
    ctxt.generateJavaSource("if(!org.apache.jasper.tagplugins.jstl.Util.isAbsoluteUrl(" + resultName + ")){");
    ctxt.generateJavaSource("    HttpServletResponse " + responseName + " = " +
    "((HttpServletResponse) pageContext.getResponse());");
    ctxt.generateJavaSource("    " + resultName + " = "
            + responseName + ".encodeURL(" + resultName + ");");
    ctxt.generateJavaSource("}");
    
    //if "var" is specified, the url string store in the attribute var defines
    if(hasVar){
        String strVar = ctxt.getConstantAttribute("var");
        ctxt.generateJavaSource("pageContext.setAttribute" +
                "(\"" + strVar + "\", " + resultName + ", " + iScope + ");");
        
        //if var is not specified, just print out the url string
    }else{
        ctxt.generateJavaSource("try{");
        ctxt.generateJavaSource("    pageContext.getOut().print(" + resultName + ");");
        ctxt.generateJavaSource("}catch(java.io.IOException ex){");
        ctxt.generateJavaSource("    throw new JspTagException(ex.toString(), ex);");
        ctxt.generateJavaSource("}");
    }
}
 
Example 20
Source File: ForEach.java    From Tomcat8-Source-Read with MIT License 4 votes vote down vote up
@Override
public void doTag(TagPluginContext ctxt) {

    String index = null;

    boolean hasVarStatus = ctxt.isAttributeSpecified("varStatus");
    if (hasVarStatus) {
        ctxt.dontUseTagPlugin();
        return;
    }

    hasVar = ctxt.isAttributeSpecified("var");
    hasBegin = ctxt.isAttributeSpecified("begin");
    hasEnd = ctxt.isAttributeSpecified("end");
    hasStep = ctxt.isAttributeSpecified("step");

    boolean hasItems = ctxt.isAttributeSpecified("items");
    if (hasItems) {
        doCollection(ctxt);
        return;
    }

    // We must have a begin and end attributes
    index = ctxt.getTemporaryVariableName();
    ctxt.generateJavaSource("for (int " + index + " = ");
    ctxt.generateAttribute("begin");
    ctxt.generateJavaSource("; " + index + " <= ");
    ctxt.generateAttribute("end");
    if (hasStep) {
        ctxt.generateJavaSource("; " + index + "+=");
        ctxt.generateAttribute("step");
        ctxt.generateJavaSource(") {");
    }
    else {
        ctxt.generateJavaSource("; " + index + "++) {");
    }

    // If var is specified and the body contains an EL, then sycn
    // the var attribute
    if (hasVar /* && ctxt.hasEL() */) {
        ctxt.generateJavaSource("_jspx_page_context.setAttribute(");
        ctxt.generateAttribute("var");
        ctxt.generateJavaSource(", String.valueOf(" + index + "));");
    }
    ctxt.generateBody();
    ctxt.generateJavaSource("}");
}