Java Code Examples for javax.servlet.jsp.PageContext#findAttribute()
The following examples show how to use
javax.servlet.jsp.PageContext#findAttribute() .
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Example 1
Source File: ScopedAttributeELResolver.java From Tomcat7.0.67 with Apache License 2.0 | 6 votes |
@Override public Object getValue(ELContext context, Object base, Object property) throws NullPointerException, PropertyNotFoundException, ELException { if (context == null) { throw new NullPointerException(); } if (base == null) { context.setPropertyResolved(true); if (property != null) { String key = property.toString(); PageContext page = (PageContext) context .getContext(JspContext.class); return page.findAttribute(key); } } return null; }
Example 2
Source File: ScopedAttributeELResolver.java From tomcatsrc with Apache License 2.0 | 6 votes |
@Override public Object getValue(ELContext context, Object base, Object property) throws NullPointerException, PropertyNotFoundException, ELException { if (context == null) { throw new NullPointerException(); } if (base == null) { context.setPropertyResolved(true); if (property != null) { String key = property.toString(); PageContext page = (PageContext) context .getContext(JspContext.class); return page.findAttribute(key); } } return null; }
Example 3
Source File: AttributeMap.java From ymate-platform-v2 with Apache License 2.0 | 6 votes |
@Override public Object get(Object key) { PageContext pc = getPageContext(); if (pc == null) { Map request = (Map) context.get("request"); Map session = (Map) context.get("session"); Map application = (Map) context.get("application"); if ((request != null) && (request.get(key) != null)) { return request.get(key); } else if ((session != null) && (session.get(key) != null)) { return session.get(key); } else if ((application != null) && (application.get(key) != null)) { return application.get(key); } } else { try { return pc.findAttribute(key.toString()); } catch (NullPointerException npe) { return null; } } return null; }
Example 4
Source File: InteractionELSupport.java From ontopia with Apache License 2.0 | 6 votes |
/** * Breaks name up into tokens separated by '.' characters, * looks up the first token (in other JSTL scopes) to get a variable. * Uses the next token (if there) to get a bean property from the variable. * Uses additional tokens to lookup bean properties of bean properties. * If the variable or any of those bean properties is a Map * then gets the object with the given token as key. * @param name The name to lookup. * @param pageContext Used to look up attributes. */ public static Object getValue(String name, PageContext pageContext) { log.debug("Looking up name: " + name + " in PageContext."); StringTokenizer tok = new StringTokenizer(name); if (tok.hasMoreTokens()) { String currentName = tok.nextToken("."); log.debug("firstName " + currentName); Object retVal = pageContext.findAttribute(currentName); while (tok.hasMoreTokens()) { currentName = tok.nextToken("."); log.debug("currentName " + currentName); retVal = getBeanProperty(retVal, currentName); log.debug("current object: " + retVal); } return retVal; } return null; }
Example 5
Source File: BlockTag.java From jsp-template-inheritance with Apache License 2.0 | 5 votes |
private PutType getPutType(PageContext pageContext) { PutType putType = (PutType) pageContext.findAttribute(getBlockTypeAttributeName(name)); if (putType == null) { return DEFAULT_PUT_TYPE; } return putType; }
Example 6
Source File: BlockTag.java From jsp-template-inheritance with Apache License 2.0 | 5 votes |
private String getPutContents(PageContext pageContext) { String putContents = (String) pageContext.findAttribute(getBlockContentsAttributeName(name)); if (putContents == null) { return ""; } return putContents; }
Example 7
Source File: ScopedAttributeELResolver.java From Tomcat8-Source-Read with MIT License | 4 votes |
@Override public Object getValue(ELContext context, Object base, Object property) { Objects.requireNonNull(context); Object result = null; if (base == null) { context.setPropertyResolved(base, property); if (property != null) { String key = property.toString(); PageContext page = (PageContext) context.getContext(JspContext.class); result = page.findAttribute(key); if (result == null) { boolean resolveClass = true; // Performance short-cut available when running on Tomcat if (AST_IDENTIFIER_KEY != null) { // Tomcat will set this key to Boolean.TRUE if the // identifier is a stand-alone identifier (i.e. // identifier) rather than part of an AstValue (i.e. // identifier.something). Imports do not need to be // checked if this is a stand-alone identifier Boolean value = (Boolean) context.getContext(AST_IDENTIFIER_KEY); if (value != null && value.booleanValue()) { resolveClass = false; } } // This might be the name of an imported class ImportHandler importHandler = context.getImportHandler(); if (importHandler != null) { Class<?> clazz = null; if (resolveClass) { clazz = importHandler.resolveClass(key); } if (clazz != null) { result = new ELClass(clazz); } if (result == null) { // This might be the name of an imported static field clazz = importHandler.resolveStatic(key); if (clazz != null) { try { result = clazz.getField(key).get(null); } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException | SecurityException e) { // Most (all?) of these should have been // prevented by the checks when the import // was defined. } } } } } } } return result; }
Example 8
Source File: ScopedAttributeELResolver.java From lams with GNU General Public License v2.0 | 4 votes |
/** * If the base object is <code>null</code>, searches the page, * request, session and application scopes for an attribute with * the given name and returns it, or <code>null</code> if no * attribute exists with the current name. * * <p>The <code>propertyResolved</code> property of the * <code>ELContext</code> object must be set to <code>true</code> by * this resolver before returning if base is <code>null</code>. If * this property is not <code>true</code> after this method is called, * the caller should ignore the return value.</p> * * @param context The context of this evaluation. * @param base Only <code>null</code> is handled by this resolver. * Other values will result in an immediate return. * @param property The name of the scoped attribute to resolve. * @return If the <code>propertyResolved</code> property of * <code>ELContext</code> was set to <code>true</code>, then * the scoped attribute; otherwise undefined. * @throws NullPointerException if context is <code>null</code> * @throws ELException if an exception was thrown while performing * the property or variable resolution. The thrown exception * must be included as the cause property of this exception, if * available. */ public Object getValue(ELContext context, Object base, Object property) { if (context == null) { throw new NullPointerException(); } if (base == null) { context.setPropertyResolved(true); if (property instanceof String) { String attribute = (String) property; PageContext ctxt = (PageContext) context.getContext(JspContext.class); return ctxt.findAttribute(attribute); } } return null; }
Example 9
Source File: TagUtils.java From feilong-taglib with Apache License 2.0 | 4 votes |
/** * Find attribute value. * * @param <T> * * @param pageContext * the page context * @param attributeName * the version name in scope * @param scope * the version search scope * @return 如果 <code>pageContext</code> 是null,抛出 {@link NullPointerException}<br> * 如果 <code>attributeName</code> 是null,抛出 {@link NullPointerException}<br> * 如果 <code>attributeName</code> 是blank,抛出 {@link IllegalArgumentException}<br> * 如果 <code>scope</code> 是null或者 blank,将会调用 {@link javax.servlet.jsp.JspContext#findAttribute(String)}<br> * 如果 <code>scope</code> 不是null或者 blank,将会调用 {@link javax.servlet.jsp.JspContext#getAttribute(String, int)}<br> * @since 1.12.8 */ @SuppressWarnings("unchecked") public static <T> T findAttributeValue(PageContext pageContext,String attributeName,String scope){ Validate.notNull(pageContext, "pageContext can't be null!"); Validate.notBlank(attributeName, "attributeName can't be blank!"); //--------------------------------------------------------------- //没有指定scope 那么从pageContext中查找 if (isNullOrEmpty(scope)){ return (T) pageContext.findAttribute(attributeName); } //如果指定了, 那么从指定的scope中获取 return (T) pageContext.getAttribute(attributeName, TagUtils.getScope(scope)); }