Examples of org.eclipse.jdt.core.dom.Expression

org.eclipse.jdt.core.dom.Expression

Abstract base class of AST nodes that represent expressions. There are several kinds of expressions.

 Expression: {@link Annotation}, {@link ArrayAccess}, {@link ArrayCreation}, {@link ArrayInitializer}, {@link Assignment}, {@link BooleanLiteral}, {@link CastExpression}, {@link CharacterLiteral}, {@link ClassInstanceCreation}, {@link ConditionalExpression}, {@link CreationReference}, {@link ExpressionMethodReference}, {@link FieldAccess}, {@link InfixExpression}, {@link InstanceofExpression}, {@link LambdaExpression}, {@link MethodInvocation}, {@link MethodReference}, {@link Name}, {@link NullLiteral}, {@link NumberLiteral}, {@link ParenthesizedExpression}, {@link PostfixExpression}, {@link PrefixExpression}, {@link StringLiteral}, {@link SuperFieldAccess}, {@link SuperMethodInvocation}, {@link SuperMethodReference}, {@link ThisExpression}, {@link TypeLiteral}, {@link TypeMethodReference}, {@link VariableDeclarationExpression}

@since 2.0

//           ---- 1 ----   ----- 2 ---    --- 5 -> 2 --   --- 4 ---
//    -------------------------- 3 -> 4 --------------------------
//    -------------------------- 3 -> exit -----------------------


    List initializers = node.initializers();
    Expression expression = node.getExpression();
    List updaters = node.updaters();
    Statement body = node.getBody();
    List<ControlFlowNode> initializercfns = null, updatercfns = null;
    ControlFlowNode expressioncfn = null, bodycfn = null, tempcfn;
    ControlFlowNode exit = controlFlowNode.getNode(ControlFlowNode.Direction.FORWARDS);

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  }
  /**
   * Example: if(bool) x = 5; else x = 7;
   */
  public boolean visit(IfStatement node) {
    Expression expression = node.getExpression();
    Statement thenStatement = node.getThenStatement();
    Statement elseStatement = node.getElseStatement();


    ControlFlowNode conditionCFN = controlFlowNode.newControlFlowNode(expression);
    // conditionCFN.copyLabelsFrom(controlFlowNode);

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  }
  /**
   * Example: myVar instanceof MyClass
   */
  public boolean visit(InstanceofExpression node) {
    Expression expression = node.getLeftOperand();
    if(expression == null)
      return false;


    ControlFlowNode expressioncfn = controlFlowNode.newControlFlowNode(expression);
    controlFlowNode.moveEdges(ControlFlowNode.Direction.BACKWARDS, expressioncfn);

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  }
  /**
   * Example: var.getRef.myMethod(1, "two", true);
   */
  public boolean visit(MethodInvocation node) {    
    Expression expression = node.getExpression();
    List arguments = node.arguments();
    ControlFlowNode expressioncfn = null, last = null;
    List<ControlFlowNode> cfns = null;
    
    if(expression != null) {

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   */
  public boolean visit(ReturnStatement node) {
    
    controlFlowNode.returning();
    
    Expression expression = node.getExpression();
    if(expression != null) {
      ControlFlowNode expressionCFN = controlFlowNode.newControlFlowNode(expression);
      controlFlowNode.moveEdges(ControlFlowNode.Direction.BACKWARDS, expressionCFN);
      expressionCFN.addEdge(ControlFlowNode.Direction.FORWARDS, controlFlowNode);
      expressionCFN.evaluate();

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  public boolean visit(SingleMemberAnnotation node) {
    return false;
  }


  public boolean visit(SingleVariableDeclaration node) {
    Expression initializer = node.getInitializer();
    if(initializer == null)
      return false;
    ControlFlowNode initializercfn = controlFlowNode.newControlFlowNode(initializer);
    controlFlowNode.moveEdges(ControlFlowNode.Direction.BACKWARDS, initializercfn);
    initializercfn.addEdge(ControlFlowNode.Direction.FORWARDS, controlFlowNode);

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  }
  /**
   * Example: super(arg1);
   */
  public boolean visit(SuperConstructorInvocation node) {
    Expression expression = node.getExpression();
    List arguments = node.arguments();
    ControlFlowNode expressioncfn = null, last = null;
    List<ControlFlowNode> cfns = null;
    
    if(expression != null) {

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    evaluate(cfns);
    return false;
  }


  public boolean visit(SwitchCase node) {
    Expression expression = node.getExpression();
    if(expression == null)
      return false;
    
    ControlFlowNode expressioncfn = controlFlowNode.newControlFlowNode(expression);
    controlFlowNode.moveEdges(ControlFlowNode.Direction.BACKWARDS, expressioncfn);

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    expressioncfn.evaluate();
    return false;
  }


  public boolean visit(SwitchStatement node) {
    Expression expression = node.getExpression();
    List statements = node.statements();
    if(expression == null)
      throw new CrystalRuntimeException("Switch statement without an expression?");
    if(statements == null || statements.size() == 0)
      throw new CrystalRuntimeException("Switch statements without any statements?");

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  @Test
  public void testReadField() throws Exception {
    CompilationUnit cu = EclipseTACSimpleTestDriver.parseCode("FieldRead", FIELD_READ);
    MethodDeclaration m = EclipseTACSimpleTestDriver.getFirstMethod(cu);
    EclipseTAC tac = new EclipseTAC(m.resolveBinding());
    Expression read = (Expression) EclipseTACSimpleTestDriver.getLastStatementReturn(m).getExpression();
    TACInstruction instr = tac.instruction(read);
    Assert.assertTrue(instr != null);
    Assert.assertTrue(instr instanceof LoadFieldInstruction);
    LoadFieldInstruction load = (LoadFieldInstruction) instr;
    Assert.assertTrue(load.getSourceObject() instanceof ThisVariable);

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