/*******************************************************************************
* Copyright (c) 2000, 2013 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 org.eclipse.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
/**
* Instanceof expression AST node type.
* <pre>
* InstanceofExpression:
* Expression <b>instanceof</b> Type
* </pre>
*
* @since 2.0
* @noinstantiate This class is not intended to be instantiated by clients.
*/
@SuppressWarnings("rawtypes")
public class InstanceofExpression extends Expression {
/**
* The "leftOperand" structural property of this node type (child type: {@link Expression}).
* @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 (child type: {@link 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
* <code>AST.JLS*</code> 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(getStartPosition(), 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:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public void setLeftOperand(Expression expression) {
if (expression == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.leftOperand;
preReplaceChild(oldChild, expression, LEFT_OPERAND_PROPERTY);
this.leftOperand = expression;
postReplaceChild(oldChild, expression, LEFT_OPERAND_PROPERTY);
}
/**
* Returns the right operand of this instanceof expression.
*
* @return the right operand node
*/
public Type getRightOperand() {
if (this.rightOperand == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.rightOperand == null) {
preLazyInit();
this.rightOperand= new SimpleType(this.ast);
postLazyInit(this.rightOperand, RIGHT_OPERAND_PROPERTY);
}
}
}
return this.rightOperand;
}
/**
* Sets the right operand of this instanceof expression.
*
* @param referenceType the right operand node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public void setRightOperand(Type referenceType) {
if (referenceType == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.rightOperand;
preReplaceChild(oldChild, referenceType, RIGHT_OPERAND_PROPERTY);
this.rightOperand = referenceType;
postReplaceChild(oldChild, referenceType, RIGHT_OPERAND_PROPERTY);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
int memSize() {
// treat Operator as free
return BASE_NODE_SIZE + 2 * 4;
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
int treeSize() {
return
memSize()
+ (this.leftOperand == null ? 0 : getLeftOperand().treeSize())
+ (this.rightOperand == null ? 0 : getRightOperand().treeSize());
}
}