org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/PostfixExpression.java - objectteams/org.eclipse.objectteams - Gitiles

 /*******************************************************************************
  * 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 org.eclipse.jdt.core.dom;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 /**
  * Postfix expression AST node type.
  *
  * <pre>
  * PostfixExpression:
  *    Expression PostfixOperator
  * </pre>
  *
  * @since 2.0
  * @noinstantiate This class is not intended to be instantiated by clients.
  */
 public class PostfixExpression extends Expression {

 	/**
  	 * Postfix operators (typesafe enumeration).
 	 * <pre>
 	 * PostfixOperator:
 	 *    <b><code>++</code></b>  <code>INCREMENT</code>
 	 *    <b><code>--</code></b>  <code>DECREMENT</code>
 	 * </pre>
 	 */
 	public static class Operator {

 		/**
 		 * The token for the operator.
 		 */
 		private String token;

 		/**
 		 * Creates a new postfix operator with the given token.
 		 * <p>
 		 * Note: this constructor is private. The only instances
 		 * ever created are the ones for the standard operators.
 		 * </p>
 		 *
 		 * @param token the character sequence for the operator
 		 */
 		private Operator(String token) {
 			this.token = token;
 		}

 		/**
 		 * Returns the character sequence for the operator.
 		 *
 		 * @return the character sequence for the operator
 		 */
 		public String toString() {
 			return this.token;
 		}

 		/** Postfix increment "++" operator. */
 		public static final Operator INCREMENT = new Operator("++");//$NON-NLS-1$
 		/** Postfix decrement "--" operator. */
 		public static final Operator DECREMENT = new Operator("--");//$NON-NLS-1$

 		/**
 		 * Map from token to operator (key type: <code>String</code>;
 		 * value type: <code>Operator</code>).
 		 */
 		private static final Map CODES;
 		static {
 			CODES = new HashMap(20);
 			Operator[] ops = {
 					INCREMENT,
 					DECREMENT,
 				};
 			for (int i = 0; i < ops.length; i++) {
 				CODES.put(ops[i].toString(), ops[i]);
 			}
 		}

 		/**
 		 * Returns the postfix operator corresponding to the given string,
 		 * or <code>null</code> if none.
 		 * <p>
 		 * <code>toOperator</code> is the converse of <code>toString</code>:
 		 * that is, <code>Operator.toOperator(op.toString()) == op</code> for
 		 * all operators <code>op</code>.
 		 * </p>
 		 *
 		 * @param token the character sequence for the operator
 		 * @return the postfix operator, or <code>null</code> if none
 		 */
 		public static Operator toOperator(String token) {
 			return (Operator) CODES.get(token);
 		}
 	}

 	/**
 	 * The "operator" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final SimplePropertyDescriptor OPERATOR_PROPERTY =
 		new SimplePropertyDescriptor(PostfixExpression.class, "operator", PostfixExpression.Operator.class, MANDATORY); //$NON-NLS-1$

 	/**
 	 * The "operand" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildPropertyDescriptor OPERAND_PROPERTY =
 		new ChildPropertyDescriptor(PostfixExpression.class, "operand", Expression.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 propertyList = new ArrayList(3);
 		createPropertyList(PostfixExpression.class, propertyList);
 		addProperty(OPERAND_PROPERTY, propertyList);
 		addProperty(OPERATOR_PROPERTY, propertyList);
 		PROPERTY_DESCRIPTORS = reapPropertyList(propertyList);
 	}

 	/**
 	 * 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 operator; defaults to an unspecified postfix operator.
 	 */
 	private PostfixExpression.Operator operator =
 		PostfixExpression.Operator.INCREMENT;

 	/**
 	 * The operand; lazily initialized; defaults to an unspecified,
 	 * but legal, simple name.
 	 */
 	private Expression operand = null;

 	/**
 	 * Creates a new AST node for an postfix expression owned by the given
 	 * AST. By default, the node has unspecified (but legal) operator and
 	 * operand.
 	 *
 	 * @param ast the AST that is to own this node
 	 */
 	PostfixExpression(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 Object internalGetSetObjectProperty(SimplePropertyDescriptor property, boolean get, Object value) {
 		if (property == OPERATOR_PROPERTY) {
 			if (get) {
 				return getOperator();
 			} else {
 				setOperator((Operator) value);
 				return null;
 			}
 		}
 		// allow default implementation to flag the error
 		return super.internalGetSetObjectProperty(property, get, value);
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
 		if (property == OPERAND_PROPERTY) {
 			if (get) {
 				return getOperand();
 			} else {
 				setOperand((Expression) 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 POSTFIX_EXPRESSION;
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	ASTNode clone0(AST target) {
 		PostfixExpression result = new PostfixExpression(target);
 		result.setSourceRange(getStartPosition(), getLength());
 		result.setOperator(getOperator());
 		result.setOperand((Expression) getOperand().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) {
 			acceptChild(visitor, getOperand());
 		}
 		visitor.endVisit(this);
 	}

 	/**
 	 * Returns the operator of this postfix expression.
 	 *
 	 * @return the operator
 	 */
 	public PostfixExpression.Operator getOperator() {
 		return this.operator;
 	}

 	/**
 	 * Sets the operator of this postfix expression.
 	 *
 	 * @param operator the operator
 	 * @exception IllegalArgumentException if the argument is incorrect
 	 */
 	public void setOperator(PostfixExpression.Operator operator) {
 		if (operator == null) {
 			throw new IllegalArgumentException();
 		}
 		preValueChange(OPERATOR_PROPERTY);
 		this.operator = operator;
 		postValueChange(OPERATOR_PROPERTY);
 	}

 	/**
 	 * Returns the operand of this postfix expression.
 	 *
 	 * @return the operand expression node
 	 */
 	public Expression getOperand() {
 		if (this.operand  == null) {
 			// lazy init must be thread-safe for readers
 			synchronized (this) {
 				if (this.operand == null) {
 					preLazyInit();
 					this.operand= new SimpleName(this.ast);
 					postLazyInit(this.operand, OPERAND_PROPERTY);
 				}
 			}
 		}
 		return this.operand;
 	}

 	/**
 	 * Sets the operand of this postfix expression.
 	 *
 	 * @param expression the operand expression 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 setOperand(Expression expression) {
 		if (expression == null) {
 			throw new IllegalArgumentException();
 		}
 		ASTNode oldChild = this.operand;
 		preReplaceChild(oldChild, expression, OPERAND_PROPERTY);
 		this.operand = expression;
 		postReplaceChild(oldChild, expression, 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.operand == null ? 0 : getOperand().treeSize());
 	}
 }
	/*******************************************************************************
	* 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 org.eclipse.jdt.core.dom;

	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	/**
	* Postfix expression AST node type.
	*
	* <pre>
	* PostfixExpression:
	* Expression PostfixOperator
	* </pre>
	*
	* @since 2.0
	* @noinstantiate This class is not intended to be instantiated by clients.
	*/
	public class PostfixExpression extends Expression {

	/**
	* Postfix operators (typesafe enumeration).
	* <pre>
	* PostfixOperator:
	* <b><code>++</code></b> <code>INCREMENT</code>
	* <b><code>--</code></b> <code>DECREMENT</code>
	* </pre>
	*/
	public static class Operator {

	/**
	* The token for the operator.
	*/
	private String token;

	/**
	* Creates a new postfix operator with the given token.
	* <p>
	* Note: this constructor is private. The only instances
	* ever created are the ones for the standard operators.
	* </p>
	*
	* @param token the character sequence for the operator
	*/
	private Operator(String token) {
	this.token = token;
	}

	/**
	* Returns the character sequence for the operator.
	*
	* @return the character sequence for the operator
	*/
	public String toString() {
	return this.token;
	}

	/** Postfix increment "++" operator. */
	public static final Operator INCREMENT = new Operator("++");//$NON-NLS-1$
	/** Postfix decrement "--" operator. */
	public static final Operator DECREMENT = new Operator("--");//$NON-NLS-1$

	/**
	* Map from token to operator (key type: <code>String</code>;
	* value type: <code>Operator</code>).
	*/
	private static final Map CODES;
	static {
	CODES = new HashMap(20);
	Operator[] ops = {
	INCREMENT,
	DECREMENT,
	};
	for (int i = 0; i < ops.length; i++) {
	CODES.put(ops[i].toString(), ops[i]);
	}
	}

	/**
	* Returns the postfix operator corresponding to the given string,
	* or <code>null</code> if none.
	* <p>
	* <code>toOperator</code> is the converse of <code>toString</code>:
	* that is, <code>Operator.toOperator(op.toString()) == op</code> for
	* all operators <code>op</code>.
	* </p>
	*
	* @param token the character sequence for the operator
	* @return the postfix operator, or <code>null</code> if none
	*/
	public static Operator toOperator(String token) {
	return (Operator) CODES.get(token);
	}
	}

	/**
	* The "operator" structural property of this node type.
	* @since 3.0
	*/
	public static final SimplePropertyDescriptor OPERATOR_PROPERTY =
	new SimplePropertyDescriptor(PostfixExpression.class, "operator", PostfixExpression.Operator.class, MANDATORY); //$NON-NLS-1$

	/**
	* The "operand" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildPropertyDescriptor OPERAND_PROPERTY =
	new ChildPropertyDescriptor(PostfixExpression.class, "operand", Expression.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 propertyList = new ArrayList(3);
	createPropertyList(PostfixExpression.class, propertyList);
	addProperty(OPERAND_PROPERTY, propertyList);
	addProperty(OPERATOR_PROPERTY, propertyList);
	PROPERTY_DESCRIPTORS = reapPropertyList(propertyList);
	}

	/**
	* 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 operator; defaults to an unspecified postfix operator.
	*/
	private PostfixExpression.Operator operator =
	PostfixExpression.Operator.INCREMENT;

	/**
	* The operand; lazily initialized; defaults to an unspecified,
	* but legal, simple name.
	*/
	private Expression operand = null;

	/**
	* Creates a new AST node for an postfix expression owned by the given
	* AST. By default, the node has unspecified (but legal) operator and
	* operand.
	*
	* @param ast the AST that is to own this node
	*/
	PostfixExpression(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 Object internalGetSetObjectProperty(SimplePropertyDescriptor property, boolean get, Object value) {
	if (property == OPERATOR_PROPERTY) {
	if (get) {
	return getOperator();
	} else {
	setOperator((Operator) value);
	return null;
	}
	}
	// allow default implementation to flag the error
	return super.internalGetSetObjectProperty(property, get, value);
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
	if (property == OPERAND_PROPERTY) {
	if (get) {
	return getOperand();
	} else {
	setOperand((Expression) 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 POSTFIX_EXPRESSION;
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	ASTNode clone0(AST target) {
	PostfixExpression result = new PostfixExpression(target);
	result.setSourceRange(getStartPosition(), getLength());
	result.setOperator(getOperator());
	result.setOperand((Expression) getOperand().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) {
	acceptChild(visitor, getOperand());
	}
	visitor.endVisit(this);
	}

	/**
	* Returns the operator of this postfix expression.
	*
	* @return the operator
	*/
	public PostfixExpression.Operator getOperator() {
	return this.operator;
	}

	/**
	* Sets the operator of this postfix expression.
	*
	* @param operator the operator
	* @exception IllegalArgumentException if the argument is incorrect
	*/
	public void setOperator(PostfixExpression.Operator operator) {
	if (operator == null) {
	throw new IllegalArgumentException();
	}
	preValueChange(OPERATOR_PROPERTY);
	this.operator = operator;
	postValueChange(OPERATOR_PROPERTY);
	}

	/**
	* Returns the operand of this postfix expression.
	*
	* @return the operand expression node
	*/
	public Expression getOperand() {
	if (this.operand == null) {
	// lazy init must be thread-safe for readers
	synchronized (this) {
	if (this.operand == null) {
	preLazyInit();
	this.operand= new SimpleName(this.ast);
	postLazyInit(this.operand, OPERAND_PROPERTY);
	}
	}
	}
	return this.operand;
	}

	/**
	* Sets the operand of this postfix expression.
	*
	* @param expression the operand expression 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 setOperand(Expression expression) {
	if (expression == null) {
	throw new IllegalArgumentException();
	}
	ASTNode oldChild = this.operand;
	preReplaceChild(oldChild, expression, OPERAND_PROPERTY);
	this.operand = expression;
	postReplaceChild(oldChild, expression, 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.operand == null ? 0 : getOperand().treeSize());
	}
	}