Examples of org.camunda.bpm.engine.impl.javax.el.ELContext

Package org.camunda.bpm.engine.impl.javax.el

Examples of org.camunda.bpm.engine.impl.javax.el.ELContext

org.camunda.bpm.engine.impl.javax.el.ELContext
Context information for expression evaluation. To evaluate an {@link Expression}, an ELContext must be provided. The ELContext holds:
- a reference to the base {@link ELResolver} that will be consulted to resolve model objectsand their properties
- a reference to {@link FunctionMapper} that will be used to resolve EL Functions.
- a reference to {@link VariableMapper} that will be used to resolve EL Variables.
- a collection of all the relevant context objects for use by ELResolvers
- state information during the evaluation of an expression, such as whether a property has been resolved yet
The collection of context objects is necessary because each ELResolver may need access to a different context object. For example, JSP and Faces resolvers need access to a javax.servlet.jsp.JspContext and a javax.faces.context.FacesContext, respectively. Creation of ELContext objects is controlled through the underlying technology. For example, in JSP the JspContext.getELContext() factory method is used. Some technologies provide the ability to add an {@link ELContextListener} so that applications and frameworks can ensure their own contextobjects are attached to any newly created ELContext. Because it stores state during expression evaluation, an ELContext object is not thread-safe. Care should be taken to never share an ELContext instance between two or more threads.

    SecurityManager securityManager = System.getSecurityManager();
    if (securityManager == null) {
      scriptCtx.setAttribute("lang:import", getImportMethod(), ScriptContext.ENGINE_SCOPE);
    }


    ELContext elContext = new ELContext() {


      ELResolver resolver = createElResolver();
      VariableMapper varMapper = new ScriptContextVariableMapper(scriptCtx);
      FunctionMapper funcMapper = new ScriptContextFunctionMapper(scriptCtx);

View Full Code Here

      System.out.println(e.getMessage());
      System.exit(0);
    }
    NodePrinter.dump(out, tree.getRoot());
    if (!tree.getFunctionNodes().iterator().hasNext() && !tree.getIdentifierNodes().iterator().hasNext()) {
      ELContext context = new ELContext() {
        @Override
        public VariableMapper getVariableMapper() {
          return null;
        }
        @Override

View Full Code Here

    this.expressionManager = expressionManager;
    this.expressionText = expressionText;
  }


  public Object getValue(VariableScope variableScope) {
    ELContext elContext = expressionManager.getElContext(variableScope);
    try {
      ExpressionGetInvocation invocation = new ExpressionGetInvocation(valueExpression, elContext);
      Context.getProcessEngineConfiguration()
        .getDelegateInterceptor()
        .handleInvocation(invocation);

View Full Code Here

      throw new ProcessEngineException("Error while evaluating expression: " + expressionText+". Cause: "+e.getMessage(), e);
    }
  }


  public void setValue(Object value, VariableScope variableScope) {
    ELContext elContext = expressionManager.getElContext(variableScope);
    try {
      ExpressionSetInvocation invocation = new ExpressionSetInvocation(valueExpression, elContext, value);
      Context.getProcessEngineConfiguration()
        .getDelegateInterceptor()
        .handleInvocation(invocation);

View Full Code Here

  public void setExpressionFactory(ExpressionFactory expressionFactory) {
    this.expressionFactory = expressionFactory;
  }


  public ELContext getElContext(VariableScope variableScope) {
    ELContext elContext = null;
    if (variableScope instanceof AbstractVariableScope) {
      AbstractVariableScope variableScopeImpl = (AbstractVariableScope) variableScope;
      elContext = variableScopeImpl.getCachedElContext();
    }

View Full Code Here

    this.expressionManager = expressionManager;
    this.expressionText = expressionText;
  }


  public Object getValue(VariableScope<?> variableScope) {
    ELContext elContext = expressionManager.getElContext(variableScope);
    try {
      ExpressionGetInvocation invocation = new ExpressionGetInvocation(valueExpression, elContext);
      Context.getProcessEngineConfiguration()
        .getDelegateInterceptor()
        .handleInvocation(invocation);

View Full Code Here

      throw new ProcessEngineException("Error while evaluating expression: " + expressionText+". Cause: "+e.getMessage(), e);
    }
  }


  public void setValue(Object value, VariableScope<?> variableScope) {
    ELContext elContext = expressionManager.getElContext(variableScope);
    try {
      ExpressionSetInvocation invocation = new ExpressionSetInvocation(valueExpression, elContext, value);
      Context.getProcessEngineConfiguration()
        .getDelegateInterceptor()
        .handleInvocation(invocation);

View Full Code Here

  public void setExpressionFactory(ExpressionFactory expressionFactory) {
    this.expressionFactory = expressionFactory;
  }


  public ELContext getElContext(VariableScope<?> variableScope) {
    ELContext elContext = null;
    if (variableScope instanceof CoreVariableScope) {
      CoreVariableScope<?> variableScopeImpl = (CoreVariableScope<?>) variableScope;
      elContext = variableScopeImpl.getCachedElContext();
    }

View Full Code Here

TOP

Related Classes of org.camunda.bpm.engine.impl.javax.el.ELContext

org.camunda.bpm.engine.impl.el.ExpressionManager

org.camunda.bpm.engine.impl.el.JuelExpression

org.camunda.bpm.engine.impl.juel.Builder

org.camunda.bpm.engine.impl.scripting.engine.JuelScriptEngine

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.