Java Code Examples for org.mvel2.ParserContext#setStrongTyping()
The following examples show how to use
org.mvel2.ParserContext#setStrongTyping() .
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Example 1
| Source File: MVELExprAnalyzer.java From kogito-runtimes with Apache License 2.0 | 6 votes |
|
public static Class<?> getExpressionType(PackageBuildContext context,
Map<String, Class< ? >> declCls,
RuleConditionElement source,
String expression) {
MVELDialectRuntimeData data = ( MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData( "mvel" );
ParserConfiguration conf = data.getParserConfiguration();
conf.setClassLoader( context.getKnowledgeBuilder().getRootClassLoader() );
ParserContext pctx = new ParserContext( conf );
pctx.setStrongTyping(true);
pctx.setStrictTypeEnforcement(true);
for (Map.Entry<String, Class< ? >> entry : declCls.entrySet()) {
pctx.addInput(entry.getKey(), entry.getValue());
}
for (Declaration decl : source.getOuterDeclarations().values()) {
pctx.addInput(decl.getBindingName(), decl.getDeclarationClass());
}
try {
return MVEL.analyze( expression, pctx );
} catch (Exception e) {
log.warn( "Unable to parse expression: " + expression, e );
}
return null;
}
Example 2
| Source File: MVELObjectClassFieldReader.java From kogito-runtimes with Apache License 2.0 | 6 votes |
|
public static void doCompile(MVELClassFieldReader target, MVELDialectRuntimeData runtimeData, Object evaluationContext) {
Class cls;
try {
cls = runtimeData.getRootClassLoader().loadClass( target.getClassName() );
} catch ( ClassNotFoundException e ) {
throw new IllegalStateException( "Unable to compile as Class could not be found '" + target.getClassName() + "'");
}
ParserContext context = new ParserContext(runtimeData.getParserConfiguration(), evaluationContext);
context.addInput( "this", cls );
context.setStrongTyping( target.isTypeSafe() );
MVEL.COMPILER_OPT_ALLOW_NAKED_METH_CALL = true;
MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING = true;
MVEL.COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION = true;
MVEL.COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS = true;
ExecutableStatement mvelExpression = (ExecutableStatement)MVEL.compileExpression( target.getExpression(), context);
Class returnType = mvelExpression.getKnownEgressType();
target.setExecutableStatement( mvelExpression );
target.setFieldType( returnType );
target.setValueType( ValueType.determineValueType( returnType ) );
target.setEvaluationContext(evaluationContext);
}
Example 3
| Source File: MVELTest.java From kogito-runtimes with Apache License 2.0 | 5 votes |
|
@Test
public void test1() {
final ParserContext pc = new ParserContext();
pc.addInput("x", String.class);
pc.setStrongTyping(true);
final Object o = MVEL.compileExpression("x.startsWith('d')", pc);
final Map vars = new HashMap();
vars.put("x", "d");
MVEL.executeExpression(o, vars);
System.out.println(o);
}
Example 4
| Source File: PatternBuilder.java From kogito-runtimes with Apache License 2.0 | 4 votes |
|
protected void setInputs(RuleBuildContext context,
ExprBindings descrBranch,
Class<?> thisClass,
String expr) {
MVELDialectRuntimeData data = (MVELDialectRuntimeData) context.getPkg().getDialectRuntimeRegistry().getDialectData("mvel");
ParserConfiguration conf = data.getParserConfiguration();
conf.setClassLoader(context.getKnowledgeBuilder().getRootClassLoader());
final ParserContext pctx = new ParserContext(conf);
pctx.setStrictTypeEnforcement(false);
pctx.setStrongTyping(false);
pctx.addInput("this", thisClass);
pctx.addInput("empty", boolean.class); // overrides the mvel empty label
MVEL.COMPILER_OPT_ALLOW_NAKED_METH_CALL = true;
MVEL.COMPILER_OPT_ALLOW_OVERRIDE_ALL_PROPHANDLING = true;
MVEL.COMPILER_OPT_ALLOW_RESOLVE_INNERCLASSES_WITH_DOTNOTATION = true;
MVEL.COMPILER_OPT_SUPPORT_JAVA_STYLE_CLASS_LITERALS = true;
try {
MVEL.analysisCompile(expr, pctx);
} catch (Exception e) {
// There is a problem in setting the inputs for this expression, but it will be
// reported during expression analysis, so swallow it at the moment
return;
}
if (!pctx.getInputs().isEmpty()) {
for (String v : pctx.getInputs().keySet()) {
// in the following if, we need to check that the expr actually contains a reference
// to an "empty" property, or the if will evaluate to true even if it doesn't
if ("this".equals(v) || (PropertyTools.getFieldOrAccessor(thisClass,
v) != null && expr.matches("(^|.*\\W)empty($|\\W.*)"))) {
descrBranch.getFieldAccessors().add(v);
} else if ("empty".equals(v)) {
// do nothing
} else if (!context.getPkg().getGlobals().containsKey(v)) {
descrBranch.getRuleBindings().add(v);
} else {
descrBranch.getGlobalBindings().add(v);
}
}
}
}
Example 5
| Source File: MVELCompilationUnit.java From kogito-runtimes with Apache License 2.0 | 4 votes |
|
public Serializable getCompiledExpression(ParserConfiguration conf, Object evaluationContext) {
final ParserContext parserContext = new ParserContext( conf, evaluationContext );
if ( MVELDebugHandler.isDebugMode() ) {
parserContext.setDebugSymbols( true );
}
parserContext.setStrictTypeEnforcement( strictMode );
parserContext.setStrongTyping( strictMode );
parserContext.setIndexAllocation( true );
if ( INTERCEPTORS != null ) {
parserContext.setInterceptors(INTERCEPTORS);
}
parserContext.addIndexedInput( inputIdentifiers );
String identifier = null;
String type = null;
try {
for ( int i = 0, length = inputIdentifiers.length; i < length; i++ ) {
identifier = inputIdentifiers[i];
type = inputTypes[i];
Class< ? > cls = loadClass( conf.getClassLoader(),
inputTypes[i] );
parserContext.addInput( inputIdentifiers[i],
cls );
}
} catch ( ClassNotFoundException e ) {
throw new RuntimeException( "Unable to resolve class '" + type + "' for identifier '" + identifier );
}
parserContext.setSourceFile( name );
String[] varNames = parserContext.getIndexedVarNames();
ExecutableStatement stmt = (ExecutableStatement) compile( expression, parserContext );
Set<String> localNames = parserContext.getVariables().keySet();
parserContext.addIndexedLocals(localNames);
String[] locals = localNames.toArray(new String[localNames.size()]);
String[] allVars = new String[varNames.length + locals.length];
System.arraycopy(varNames, 0, allVars, 0, varNames.length);
System.arraycopy(locals, 0, allVars, varNames.length, locals.length);
this.varModel = new SimpleVariableSpaceModel(allVars);
this.allVarsLength = allVars.length;
return stmt;
}
Example 6
| Source File: MVELtest.java From JDeSurvey with GNU Affero General Public License v3.0 | 4 votes |
|
public static void main(String args[]) {
ParserContext ctx = new ParserContext();
ctx.setStrongTyping(true);
ctx.addInput("page", SurveyPage.class);
//compile an expression 'str.toUpperCase()'
String texpression = "e= page.questionAnswers[0].booleanAnswerValue;e==null? false:true;";
try {
ExecutableStatement ce = (ExecutableStatement) MVEL.compileExpression(texpression, ctx);
Class returnType = ce.getKnownEgressType(); // returns java.lang.String in this case.
System.out.println(returnType.toString());
if (returnType.equals(Boolean.class)) {
System.out.println("Pass");}
else{
System.out.println("No Pass");
}
}
catch (Exception e) {
System.out.println("Invalid Expression");
System.out.println(e);
}
//String texpression = "survey.pages[0].questions[0].booleanAnswerValue";
//Survey survey =surveyService.Survey_findById((long) 5);
Survey survey = new Survey();
//System.out.println(survey.getTypeName());
//System.out.println(survey.getPages().first().getTitle());
/*
System.out.println("---------------->" + survey.getPages().first().getQuestions().get(0).getBooleanAnswerValue());
Map map = new HashMap();
map.put("survey", survey);
for (SurveyPage surveyPage : survey.getPages()){
System.out.println(surveyPage.getOrder());
Boolean pageVisibility = (Boolean) MVEL.eval(surveyPage.getVisibilityExpression(), map);
System.out.println(pageVisibility);
if (pageVisibility) {
System.out.println(surveyPage.getOrder());
}
}
*/
/*
String expression = "age > 25 ? 2000 : 1000;";
Map vars = new HashMap();
vars.put("age", new Integer(24));
// We know this expression should return a boolean.
Integer result = (Integer) MVEL.eval(expression, vars);
System.out.println(result);
//compiled mode
String expression2 = "foobar3 > 99";
// Compile the expression.
Serializable compiled = MVEL.compileExpression(expression2);
Map vars2 = new HashMap();
vars2.put("foobar", new Integer(100));
// Now we execute it.
Boolean result2 = (Boolean) MVEL.executeExpression(compiled, vars2);
if (result2.booleanValue()) {
System.out.println("It works!");
}
else{
System.out.println("It does not work!");
}
*/
}
Example 7
| Source File: SurveyDefinitionPageController.java From JDeSurvey with GNU Affero General Public License v3.0 | 4 votes |
|
@RequestMapping(method = RequestMethod.PUT, produces = "text/html")
public String update(@RequestParam(value = "_proceed", required = false) String proceed,
@Valid SurveyDefinitionPage surveyDefinitionPage,
BindingResult bindingResult,
Principal principal,
Model uiModel,
HttpServletRequest httpServletRequest) {
log.info("update(): handles PUT");
try{
User user = userService.user_findByLogin(principal.getName());
if(!securityService.userIsAuthorizedToManageSurvey(surveyDefinitionPage.getSurveyDefinition().getId(), user) &&
!securityService.userBelongsToDepartment(surveyDefinitionPage.getSurveyDefinition().getDepartment().getId(), user) ) {
log.warn("Unauthorized access to url path " + httpServletRequest.getPathInfo() + " attempted by user login:" + principal.getName() + "from IP:" + httpServletRequest.getLocalAddr());
return "accessDenied";
}
if(proceed != null){
if (bindingResult.hasErrors()) {
populateEditForm(uiModel, surveyDefinitionPage,user);
return "settings/surveyDefinitionPages/update";
}
//validate VisibilityExpression
boolean isValid = true;
ParserContext ctx = new ParserContext();
ctx.setStrongTyping(true);
ctx.addInput("surveyDefinition", SurveyDefinition.class);
uiModel.asMap().clear();
surveyDefinitionPage =surveySettingsService.surveyDefinitionPage_merge(surveyDefinitionPage);
return "settings/surveyDefinitionPages/saved";
}else{
return "redirect:/settings/surveyDefinitions/" + encodeUrlPathSegment(surveyDefinitionPage.getSurveyDefinition().getId().toString(), httpServletRequest);
}
} catch (Exception e) {
log.error(e.getMessage(),e);
throw (new RuntimeException(e));
}
}
