Copyright (c) 2000, 2013 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * 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.
InstanceofExpression:
   Expression instanceof Type

Since:
2.0
@noinstantiate
This class is not intended to be instantiated by clients./**
 * 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: Expression). 
Since:
3.0/**
	 * 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: Type). 
Since:
3.0/**
	 * 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: StructuralPropertyDescriptor), or null if uninitialized. /**
	 * 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.
Params:
apiLevel – the API level; one of the
AST.JLS* constants
Returns:
a list of property descriptors (element type: StructuralPropertyDescriptor)
Since:
3.0/**
	 * 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.
/**
	 * 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.
/**
	 * 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.
Params:
ast – the AST that is to own this node/**
	 * 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);
	}

	@Override
	final List internalStructuralPropertiesForType(int apiLevel) {
		return propertyDescriptors(apiLevel);
	}

	@Override
	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);
	}

	@Override
	final int getNodeType0() {
		return INSTANCEOF_EXPRESSION;
	}

	@Override
	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;
	}

	@Override
	final boolean subtreeMatch0(ASTMatcher matcher, Object other) {
		// dispatch to correct overloaded match method
		return matcher.match(this, other);
	}

	@Override
	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.
Returns:
the left operand node/**
	 * 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.
Params:
expression – the left operand node
Throws:
IllegalArgumentException – if:

the node belongs to a different AST
the node already has a parent
a cycle in would be created
/**
	 * 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.
Returns:
the right operand node/**
	 * 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.
Params:
referenceType – the right operand node
Throws:
IllegalArgumentException – if:

the node belongs to a different AST
the node already has a parent
a cycle in would be created
/**
	 * 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);
	}

	@Override
	int memSize() {
		// treat Operator as free
		return BASE_NODE_SIZE + 2 * 4;
	}

	@Override
	int treeSize() {
		return
			memSize()
			+ (this.leftOperand == null ? 0 : getLeftOperand().treeSize())
			+ (this.rightOperand == null ? 0 : getRightOperand().treeSize());
	}
}