Examples of org.activiti.engine.impl.javax.el.ELContext

Package org.activiti.engine.impl.javax.el

Examples of org.activiti.engine.impl.javax.el.ELContext

org.activiti.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.

    @Test
    public void testGetValue() {
        assertNull(resolver.getValue(null, null, null));
        assertNull(resolver.getValue(null, null, "NonCamelProperty"));


        ELContext context = expectELContextResolved();
        assertSame(resolver.getCamelBehaviour(), resolver.getValue(context, null, CAMEL_PROPERTY_NAME));
    }

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    /*
     * Set up a mock ELContext that expects the property to get resolved
     */
    private ELContext expectELContextResolved() {
        ELContext context = createMock(ELContext.class);
        context.setPropertyResolved(true);
        replay(context);
        return context;
    }

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    this.valueExpression = valueExpression;
    this.expressionText = expressionText;
  }


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

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      throw new ActivitiException("Error while evaluating expression: " + expressionText, e);
    }
  }
    
  public void setValue(Object value, VariableScope variableScope) {
    ELContext elContext = Context.getProcessEngineConfiguration().getExpressionManager().getElContext(variableScope);
    try {
      ExpressionSetInvocation invocation = new ExpressionSetInvocation(valueExpression, elContext, value);
      Context.getProcessEngineConfiguration()
        .getDelegateInterceptor()
        .handleInvocation(invocation);

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


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

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    @Test
    public void testGetValue() {
        assertNull(resolver.getValue(null, null, null));
        assertNull(resolver.getValue(null, null, "NonCamelProperty"));


        ELContext context = expectELContextResolved();
        assertSame(resolver.getCamelBehaviour(), resolver.getValue(context, null, CAMEL_PROPERTY_NAME));
    }

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    /*
     * Set up a mock ELContext that expects the property to get resolved
     */
    private ELContext expectELContextResolved() {
        ELContext context = createMock(ELContext.class);
        context.setPropertyResolved(true);
        replay(context);
        return context;
    }

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      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

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    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);

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      throw new ActivitiException("Error while evaluating expression: " + expressionText, 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);

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Related Classes of org.activiti.engine.impl.javax.el.ELContext

org.activiti.engine.impl.el.ExpressionManager

org.activiti.engine.impl.el.JuelExpression

org.activiti.engine.impl.juel.Builder

org.activiti.engine.impl.scripting.JuelScriptEngine

org.apache.servicemix.activiti.config.CamelAwareELResolverTest

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