org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/IfStatement.java - gerrit/aspectj/org.aspectj.shadows - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2004 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;

 /**
  * If statement AST node type.
  * <pre>
  * IfStatement:
  *    <b>if</b> <b>(</b> Expression <b>)</b> Statement [ <b>else</b> Statement]
  * </pre>
  *
  * @since 2.0
  */
 public class IfStatement extends Statement {

 	/**
 	 * The "expression" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
 		new ChildPropertyDescriptor(IfStatement.class, "expression", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$

 	/**
 	 * The "thenStatement" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildPropertyDescriptor THEN_STATEMENT_PROPERTY =
 		new ChildPropertyDescriptor(IfStatement.class, "thenStatement", Statement.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$

 	/**
 	 * The "elseStatement" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildPropertyDescriptor ELSE_STATEMENT_PROPERTY =
 		new ChildPropertyDescriptor(IfStatement.class, "elseStatement", Statement.class, OPTIONAL, 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(4);
 		createPropertyList(IfStatement.class, properyList);
 		addProperty(EXPRESSION_PROPERTY, properyList);
 		addProperty(THEN_STATEMENT_PROPERTY, properyList);
 		addProperty(ELSE_STATEMENT_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&ast;</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 expression; lazily initialized; defaults to an unspecified, but
 	 * legal, expression.
 	 */
 	private Expression expression = null;

 	/**
 	 * The then statement; lazily initialized; defaults to an unspecified, but
 	 * legal, statement.
 	 */
 	private Statement thenStatement = null;

 	/**
 	 * The else statement; <code>null</code> for none; defaults to none.
 	 */
 	private Statement optionalElseStatement = null;

 	/**
 	 * Creates a new unparented if statement node owned by the given
 	 * AST. By default, the expresssion is unspecified,
 	 * but legal, the then statement is an empty block, and there is no else
 	 * statement.
 	 * <p>
 	 * N.B. This constructor is package-private.
 	 * </p>
 	 *
 	 * @param ast the AST that is to own this node
 	 */
 	IfStatement(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 == EXPRESSION_PROPERTY) {
 			if (get) {
 				return getExpression();
 			} else {
 				setExpression((Expression) child);
 				return null;
 			}
 		}
 		if (property == THEN_STATEMENT_PROPERTY) {
 			if (get) {
 				return getThenStatement();
 			} else {
 				setThenStatement((Statement) child);
 				return null;
 			}
 		}
 		if (property == ELSE_STATEMENT_PROPERTY) {
 			if (get) {
 				return getElseStatement();
 			} else {
 				setElseStatement((Statement) 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 IF_STATEMENT;
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	ASTNode clone0(AST target) {
 		IfStatement result = new IfStatement(target);
 		result.setSourceRange(this.getStartPosition(), this.getLength());
 		result.copyLeadingComment(this);
 		result.setExpression((Expression) getExpression().clone(target));
 		result.setThenStatement(
 			(Statement) getThenStatement().clone(target));
 		result.setElseStatement(
 			(Statement) ASTNode.copySubtree(target, getElseStatement()));
 		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, getExpression());
 			acceptChild(visitor, getThenStatement());
 			acceptChild(visitor, getElseStatement());
 		}
 		visitor.endVisit(this);
 	}

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

 	/**
 	 * Sets the condition of this if statement.
 	 *
 	 * @param expression the 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 setExpression(Expression expression) {
 		if (expression == null) {
 			throw new IllegalArgumentException();
 		}
 		ASTNode oldChild = this.expression;
 		preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
 		this.expression = expression;
 		postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
 	}

 	/**
 	 * Returns the "then" part of this if statement.
 	 *
 	 * @return the "then" statement node
 	 */
 	public Statement getThenStatement() {
 		if (this.thenStatement == null) {
 			// lazy init must be thread-safe for readers
 			synchronized (this) {
 				if (this.thenStatement == null) {
 					preLazyInit();
 					this.thenStatement = new Block(this.ast);
 					postLazyInit(this.thenStatement, THEN_STATEMENT_PROPERTY);
 				}
 			}
 		}
 		return this.thenStatement;
 	}

 	/**
 	 * Sets the "then" part of this if statement.
 	 * <p>
 	 * Special note: The Java language does not allow a local variable declaration
 	 * to appear as the "then" part of an if statement (they may only appear within a
 	 * block). However, the AST will allow a <code>VariableDeclarationStatement</code>
 	 * as the thenStatement of a <code>IfStatement</code>. To get something that will
 	 * compile, be sure to embed the <code>VariableDeclarationStatement</code>
 	 * inside a <code>Block</code>.
 	 * </p>
 	 *
 	 * @param statement the "then" statement 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 setThenStatement(Statement statement) {
 		if (statement == null) {
 			throw new IllegalArgumentException();
 		}
 		ASTNode oldChild = this.thenStatement;
 		preReplaceChild(oldChild, statement, THEN_STATEMENT_PROPERTY);
 		this.thenStatement = statement;
 		postReplaceChild(oldChild, statement, THEN_STATEMENT_PROPERTY);
 	}

 	/**
 	 * Returns the "else" part of this if statement, or <code>null</code> if
 	 * this if statement has <b>no</b> "else" part.
 	 * <p>
 	 * Note that there is a subtle difference between having no else
 	 * statement and having an empty statement ("{}") or null statement (";").
 	 * </p>
 	 *
 	 * @return the "else" statement node, or <code>null</code> if none
 	 */
 	public Statement getElseStatement() {
 		return this.optionalElseStatement;
 	}

 	/**
 	 * Sets or clears the "else" part of this if statement.
 	 * <p>
 	 * Note that there is a subtle difference between having no else part
 	 * (as in <code>"if(true){}"</code>) and having an empty block (as in
 	 * "if(true){}else{}") or null statement (as in "if(true){}else;").
 	 * </p>
 	 * <p>
 	 * Special note: The Java language does not allow a local variable declaration
 	 * to appear as the "else" part of an if statement (they may only appear within a
 	 * block). However, the AST will allow a <code>VariableDeclarationStatement</code>
 	 * as the elseStatement of a <code>IfStatement</code>. To get something that will
 	 * compile, be sure to embed the <code>VariableDeclarationStatement</code>
 	 * inside a <code>Block</code>.
 	 * </p>
 	 *
 	 * @param statement the "else" statement node, or <code>null</code> if
 	 *    there is none
 	 * @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 setElseStatement(Statement statement) {
 		ASTNode oldChild = this.optionalElseStatement;
 		preReplaceChild(oldChild, statement, ELSE_STATEMENT_PROPERTY);
 		this.optionalElseStatement = statement;
 		postReplaceChild(oldChild, statement, ELSE_STATEMENT_PROPERTY);
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	int memSize() {
 		return super.memSize() + 3 * 4;
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	int treeSize() {
 		return
 			memSize()
 			+ (this.expression == null ? 0 : getExpression().treeSize())
 			+ (this.thenStatement == null ? 0 : getThenStatement().treeSize())
 			+ (this.optionalElseStatement == null ? 0 : getElseStatement().treeSize());
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2004 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;

	/**
	* If statement AST node type.
	* <pre>
	* IfStatement:
	* <b>if</b> <b>(</b> Expression <b>)</b> Statement [ <b>else</b> Statement]
	* </pre>
	*
	* @since 2.0
	*/
	public class IfStatement extends Statement {

	/**
	* The "expression" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
	new ChildPropertyDescriptor(IfStatement.class, "expression", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$

	/**
	* The "thenStatement" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildPropertyDescriptor THEN_STATEMENT_PROPERTY =
	new ChildPropertyDescriptor(IfStatement.class, "thenStatement", Statement.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$

	/**
	* The "elseStatement" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildPropertyDescriptor ELSE_STATEMENT_PROPERTY =
	new ChildPropertyDescriptor(IfStatement.class, "elseStatement", Statement.class, OPTIONAL, 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(4);
	createPropertyList(IfStatement.class, properyList);
	addProperty(EXPRESSION_PROPERTY, properyList);
	addProperty(THEN_STATEMENT_PROPERTY, properyList);
	addProperty(ELSE_STATEMENT_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&ast;</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 expression; lazily initialized; defaults to an unspecified, but
	* legal, expression.
	*/
	private Expression expression = null;

	/**
	* The then statement; lazily initialized; defaults to an unspecified, but
	* legal, statement.
	*/
	private Statement thenStatement = null;

	/**
	* The else statement; <code>null</code> for none; defaults to none.
	*/
	private Statement optionalElseStatement = null;

	/**
	* Creates a new unparented if statement node owned by the given
	* AST. By default, the expresssion is unspecified,
	* but legal, the then statement is an empty block, and there is no else
	* statement.
	* <p>
	* N.B. This constructor is package-private.
	* </p>
	*
	* @param ast the AST that is to own this node
	*/
	IfStatement(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 == EXPRESSION_PROPERTY) {
	if (get) {
	return getExpression();
	} else {
	setExpression((Expression) child);
	return null;
	}
	}
	if (property == THEN_STATEMENT_PROPERTY) {
	if (get) {
	return getThenStatement();
	} else {
	setThenStatement((Statement) child);
	return null;
	}
	}
	if (property == ELSE_STATEMENT_PROPERTY) {
	if (get) {
	return getElseStatement();
	} else {
	setElseStatement((Statement) 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 IF_STATEMENT;
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	ASTNode clone0(AST target) {
	IfStatement result = new IfStatement(target);
	result.setSourceRange(this.getStartPosition(), this.getLength());
	result.copyLeadingComment(this);
	result.setExpression((Expression) getExpression().clone(target));
	result.setThenStatement(
	(Statement) getThenStatement().clone(target));
	result.setElseStatement(
	(Statement) ASTNode.copySubtree(target, getElseStatement()));
	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, getExpression());
	acceptChild(visitor, getThenStatement());
	acceptChild(visitor, getElseStatement());
	}
	visitor.endVisit(this);
	}

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

	/**
	* Sets the condition of this if statement.
	*
	* @param expression the 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 setExpression(Expression expression) {
	if (expression == null) {
	throw new IllegalArgumentException();
	}
	ASTNode oldChild = this.expression;
	preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
	this.expression = expression;
	postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
	}

	/**
	* Returns the "then" part of this if statement.
	*
	* @return the "then" statement node
	*/
	public Statement getThenStatement() {
	if (this.thenStatement == null) {
	// lazy init must be thread-safe for readers
	synchronized (this) {
	if (this.thenStatement == null) {
	preLazyInit();
	this.thenStatement = new Block(this.ast);
	postLazyInit(this.thenStatement, THEN_STATEMENT_PROPERTY);
	}
	}
	}
	return this.thenStatement;
	}

	/**
	* Sets the "then" part of this if statement.
	* <p>
	* Special note: The Java language does not allow a local variable declaration
	* to appear as the "then" part of an if statement (they may only appear within a
	* block). However, the AST will allow a <code>VariableDeclarationStatement</code>
	* as the thenStatement of a <code>IfStatement</code>. To get something that will
	* compile, be sure to embed the <code>VariableDeclarationStatement</code>
	* inside a <code>Block</code>.
	* </p>
	*
	* @param statement the "then" statement 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 setThenStatement(Statement statement) {
	if (statement == null) {
	throw new IllegalArgumentException();
	}
	ASTNode oldChild = this.thenStatement;
	preReplaceChild(oldChild, statement, THEN_STATEMENT_PROPERTY);
	this.thenStatement = statement;
	postReplaceChild(oldChild, statement, THEN_STATEMENT_PROPERTY);
	}

	/**
	* Returns the "else" part of this if statement, or <code>null</code> if
	* this if statement has <b>no</b> "else" part.
	* <p>
	* Note that there is a subtle difference between having no else
	* statement and having an empty statement ("{}") or null statement (";").
	* </p>
	*
	* @return the "else" statement node, or <code>null</code> if none
	*/
	public Statement getElseStatement() {
	return this.optionalElseStatement;
	}

	/**
	* Sets or clears the "else" part of this if statement.
	* <p>
	* Note that there is a subtle difference between having no else part
	* (as in <code>"if(true){}"</code>) and having an empty block (as in
	* "if(true){}else{}") or null statement (as in "if(true){}else;").
	* </p>
	* <p>
	* Special note: The Java language does not allow a local variable declaration
	* to appear as the "else" part of an if statement (they may only appear within a
	* block). However, the AST will allow a <code>VariableDeclarationStatement</code>
	* as the elseStatement of a <code>IfStatement</code>. To get something that will
	* compile, be sure to embed the <code>VariableDeclarationStatement</code>
	* inside a <code>Block</code>.
	* </p>
	*
	* @param statement the "else" statement node, or <code>null</code> if
	* there is none
	* @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 setElseStatement(Statement statement) {
	ASTNode oldChild = this.optionalElseStatement;
	preReplaceChild(oldChild, statement, ELSE_STATEMENT_PROPERTY);
	this.optionalElseStatement = statement;
	postReplaceChild(oldChild, statement, ELSE_STATEMENT_PROPERTY);
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	int memSize() {
	return super.memSize() + 3 * 4;
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	int treeSize() {
	return
	memSize()
	+ (this.expression == null ? 0 : getExpression().treeSize())
	+ (this.thenStatement == null ? 0 : getThenStatement().treeSize())
	+ (this.optionalElseStatement == null ? 0 : getElseStatement().treeSize());
	}
	}