/******************************************************************************* * Copyright (c) 2000, 2008 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package net.sourceforge.phpdt.core.dom; import java.util.ArrayList; import java.util.List; /** * Instanceof expression AST node type. *
* InstanceofExpression: * Expression instanceof Type ** * @since 2.0 * @noinstantiate This class is not intended to be instantiated by clients. */ public class InstanceofExpression extends Expression { /** * The "leftOperand" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor LEFT_OPERAND_PROPERTY = new ChildPropertyDescriptor(InstanceofExpression.class, "leftOperand", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * The "rightOperand" structural property of this node type. * @since 3.0 */ public static final ChildPropertyDescriptor RIGHT_OPERAND_PROPERTY = new ChildPropertyDescriptor(InstanceofExpression.class, "rightOperand", Type.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * A list of property descriptors (element type: * {@link StructuralPropertyDescriptor}), * or null if uninitialized. */ private static final List PROPERTY_DESCRIPTORS; static { List properyList = new ArrayList(3); createPropertyList(InstanceofExpression.class, properyList); addProperty(LEFT_OPERAND_PROPERTY, properyList); addProperty(RIGHT_OPERAND_PROPERTY, properyList); PROPERTY_DESCRIPTORS = reapPropertyList(properyList); } /** * Returns a list of structural property descriptors for this node type. * Clients must not modify the result. * * @param apiLevel the API level; one of the *
AST.JLS*
constants
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
* @since 3.0
*/
public static List propertyDescriptors(int apiLevel) {
return PROPERTY_DESCRIPTORS;
}
/**
* The left operand; lazily initialized; defaults to an unspecified,
* but legal, simple name.
*/
private Expression leftOperand = null;
/**
* The right operand; lazily initialized; defaults to an unspecified,
* but legal, simple type.
*/
private Type rightOperand = null;
/**
* Creates a new AST node for an instanceof expression owned by the given
* AST. By default, the node has unspecified (but legal) operator,
* left and right operands.
*
* @param ast the AST that is to own this node
*/
InstanceofExpression(AST ast) {
super(ast);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
if (property == LEFT_OPERAND_PROPERTY) {
if (get) {
return getLeftOperand();
} else {
setLeftOperand((Expression) child);
return null;
}
}
if (property == RIGHT_OPERAND_PROPERTY) {
if (get) {
return getRightOperand();
} else {
setRightOperand((Type) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
final int getNodeType0() {
return INSTANCEOF_EXPRESSION;
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
ASTNode clone0(AST target) {
InstanceofExpression result = new InstanceofExpression(target);
result.setSourceRange(this.getStartPosition(), this.getLength());
result.setLeftOperand((Expression) getLeftOperand().clone(target));
result.setRightOperand((Type) getRightOperand().clone(target));
return result;
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
final boolean subtreeMatch0(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
// visit children in normal left to right reading order
acceptChild(visitor, getLeftOperand());
acceptChild(visitor, getRightOperand());
}
visitor.endVisit(this);
}
/**
* Returns the left operand of this instanceof expression.
*
* @return the left operand node
*/
public Expression getLeftOperand() {
if (this.leftOperand == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.leftOperand == null) {
preLazyInit();
this.leftOperand= new SimpleName(this.ast);
postLazyInit(this.leftOperand, LEFT_OPERAND_PROPERTY);
}
}
}
return this.leftOperand;
}
/**
* Sets the left operand of this instanceof expression.
*
* @param expression the left operand node
* @exception IllegalArgumentException if:
*