org.eclipse.jdt.core/dom/org/eclipse/jdt/core/dom/TryStatement.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.List;

 /**
  * Try statement AST node type.
  *
  * <pre>
  * TryStatement:
  *     <b>try</b> Block
  *         { CatchClause }
  *         [ <b>finally</b> Block ]
  * </pre>
  *
  * @since 2.0
  * @noinstantiate This class is not intended to be instantiated by clients.
  */
 public class TryStatement extends Statement {

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

 	/**
 	 * The "catchClauses" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildListPropertyDescriptor CATCH_CLAUSES_PROPERTY =
 		new ChildListPropertyDescriptor(TryStatement.class, "catchClauses", CatchClause.class, CYCLE_RISK); //$NON-NLS-1$

 	/**
 	 * The "finally" structural property of this node type.
 	 * @since 3.0
 	 */
 	public static final ChildPropertyDescriptor FINALLY_PROPERTY =
 		new ChildPropertyDescriptor(TryStatement.class, "finally", Block.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 propertyList = new ArrayList(4);
 		createPropertyList(TryStatement.class, propertyList);
 		addProperty(BODY_PROPERTY, propertyList);
 		addProperty(CATCH_CLAUSES_PROPERTY, propertyList);
 		addProperty(FINALLY_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 body; lazily initialized; defaults to an empty block.
 	 */
 	private Block body = null;

 	/**
 	 * The catch clauses (element type: <code>CatchClause</code>).
 	 * Defaults to an empty list.
 	 */
 	private ASTNode.NodeList catchClauses =
 		new ASTNode.NodeList(CATCH_CLAUSES_PROPERTY);

 	/**
 	 * The finally block, or <code>null</code> if none.
 	 * Defaults to none.
 	 */
 	private Block optionalFinallyBody = null;


 	/**
 	 * Creates a new AST node for a try statement owned by the given
 	 * AST. By default, the try statement has an empty block, no catch
 	 * clauses, and no finally block.
 	 * <p>
 	 * N.B. This constructor is package-private.
 	 * </p>
 	 *
 	 * @param ast the AST that is to own this node
 	 */
 	TryStatement(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 == BODY_PROPERTY) {
 			if (get) {
 				return getBody();
 			} else {
 				setBody((Block) child);
 				return null;
 			}
 		}
 		if (property == FINALLY_PROPERTY) {
 			if (get) {
 				return getFinally();
 			} else {
 				setFinally((Block) 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 List internalGetChildListProperty(ChildListPropertyDescriptor property) {
 		if (property == CATCH_CLAUSES_PROPERTY) {
 			return catchClauses();
 		}
 		// allow default implementation to flag the error
 		return super.internalGetChildListProperty(property);
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	final int getNodeType0() {
 		return TRY_STATEMENT;
 	}

 	/* (omit javadoc for this method)
 	 * Method declared on ASTNode.
 	 */
 	ASTNode clone0(AST target) {
 		TryStatement result = new TryStatement(target);
 		result.setSourceRange(getStartPosition(), getLength());
 		result.copyLeadingComment(this);
 		result.setBody((Block) getBody().clone(target));
 		result.catchClauses().addAll(
 			ASTNode.copySubtrees(target, catchClauses()));
 		result.setFinally(
 			(Block) ASTNode.copySubtree(target, getFinally()));
 		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, getBody());
 			acceptChildren(visitor, this.catchClauses);
 			acceptChild(visitor, getFinally());
 		}
 		visitor.endVisit(this);
 	}

 	/**
 	 * Returns the body of this try statement.
 	 *
 	 * @return the try body
 	 */
 	public Block getBody() {
 		if (this.body == null) {
 			// lazy init must be thread-safe for readers
 			synchronized (this) {
 				if (this.body == null) {
 					preLazyInit();
 					this.body = new Block(this.ast);
 					postLazyInit(this.body, BODY_PROPERTY);
 				}
 			}
 		}
 		return this.body;
 	}

 	/**
 	 * Sets the body of this try statement.
 	 *
 	 * @param body the block 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 setBody(Block body) {
 		if (body == null) {
 			throw new IllegalArgumentException();
 		}
 		ASTNode oldChild = this.body;
 		preReplaceChild(oldChild, body, BODY_PROPERTY);
 		this.body = body;
 		postReplaceChild(oldChild, body, BODY_PROPERTY);
 	}

 	/**
 	 * Returns the live ordered list of catch clauses for this try statement.
 	 *
 	 * @return the live list of catch clauses
 	 *    (element type: <code>CatchClause</code>)
 	 */
 	public List catchClauses() {
 		return this.catchClauses;
 	}

 	/**
 	 * Returns the finally block of this try statement, or <code>null</code> if
 	 * this try statement has <b>no</b> finally block.
 	 *
 	 * @return the finally block, or <code>null</code> if this try statement
 	 *    has none
 	 */
 	public Block getFinally() {
 		return this.optionalFinallyBody;
 	}

 	/**
 	 * Sets or clears the finally block of this try statement.
 	 *
 	 * @param block the finally block 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 setFinally(Block block) {
 		ASTNode oldChild = this.optionalFinallyBody;
 		preReplaceChild(oldChild, block, FINALLY_PROPERTY);
 		this.optionalFinallyBody = block;
 		postReplaceChild(oldChild, block, FINALLY_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.body == null ? 0 : getBody().treeSize())
 			+ this.catchClauses.listSize()
 			+ (this.optionalFinallyBody == null ? 0 : getFinally().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.List;

	/**
	* Try statement AST node type.
	*
	* <pre>
	* TryStatement:
	* <b>try</b> Block
	* { CatchClause }
	* [ <b>finally</b> Block ]
	* </pre>
	*
	* @since 2.0
	* @noinstantiate This class is not intended to be instantiated by clients.
	*/
	public class TryStatement extends Statement {

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

	/**
	* The "catchClauses" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildListPropertyDescriptor CATCH_CLAUSES_PROPERTY =
	new ChildListPropertyDescriptor(TryStatement.class, "catchClauses", CatchClause.class, CYCLE_RISK); //$NON-NLS-1$

	/**
	* The "finally" structural property of this node type.
	* @since 3.0
	*/
	public static final ChildPropertyDescriptor FINALLY_PROPERTY =
	new ChildPropertyDescriptor(TryStatement.class, "finally", Block.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 propertyList = new ArrayList(4);
	createPropertyList(TryStatement.class, propertyList);
	addProperty(BODY_PROPERTY, propertyList);
	addProperty(CATCH_CLAUSES_PROPERTY, propertyList);
	addProperty(FINALLY_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 body; lazily initialized; defaults to an empty block.
	*/
	private Block body = null;

	/**
	* The catch clauses (element type: <code>CatchClause</code>).
	* Defaults to an empty list.
	*/
	private ASTNode.NodeList catchClauses =
	new ASTNode.NodeList(CATCH_CLAUSES_PROPERTY);

	/**
	* The finally block, or <code>null</code> if none.
	* Defaults to none.
	*/
	private Block optionalFinallyBody = null;


	/**
	* Creates a new AST node for a try statement owned by the given
	* AST. By default, the try statement has an empty block, no catch
	* clauses, and no finally block.
	* <p>
	* N.B. This constructor is package-private.
	* </p>
	*
	* @param ast the AST that is to own this node
	*/
	TryStatement(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 == BODY_PROPERTY) {
	if (get) {
	return getBody();
	} else {
	setBody((Block) child);
	return null;
	}
	}
	if (property == FINALLY_PROPERTY) {
	if (get) {
	return getFinally();
	} else {
	setFinally((Block) 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 List internalGetChildListProperty(ChildListPropertyDescriptor property) {
	if (property == CATCH_CLAUSES_PROPERTY) {
	return catchClauses();
	}
	// allow default implementation to flag the error
	return super.internalGetChildListProperty(property);
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	final int getNodeType0() {
	return TRY_STATEMENT;
	}

	/* (omit javadoc for this method)
	* Method declared on ASTNode.
	*/
	ASTNode clone0(AST target) {
	TryStatement result = new TryStatement(target);
	result.setSourceRange(getStartPosition(), getLength());
	result.copyLeadingComment(this);
	result.setBody((Block) getBody().clone(target));
	result.catchClauses().addAll(
	ASTNode.copySubtrees(target, catchClauses()));
	result.setFinally(
	(Block) ASTNode.copySubtree(target, getFinally()));
	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, getBody());
	acceptChildren(visitor, this.catchClauses);
	acceptChild(visitor, getFinally());
	}
	visitor.endVisit(this);
	}

	/**
	* Returns the body of this try statement.
	*
	* @return the try body
	*/
	public Block getBody() {
	if (this.body == null) {
	// lazy init must be thread-safe for readers
	synchronized (this) {
	if (this.body == null) {
	preLazyInit();
	this.body = new Block(this.ast);
	postLazyInit(this.body, BODY_PROPERTY);
	}
	}
	}
	return this.body;
	}

	/**
	* Sets the body of this try statement.
	*
	* @param body the block 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 setBody(Block body) {
	if (body == null) {
	throw new IllegalArgumentException();
	}
	ASTNode oldChild = this.body;
	preReplaceChild(oldChild, body, BODY_PROPERTY);
	this.body = body;
	postReplaceChild(oldChild, body, BODY_PROPERTY);
	}

	/**
	* Returns the live ordered list of catch clauses for this try statement.
	*
	* @return the live list of catch clauses
	* (element type: <code>CatchClause</code>)
	*/
	public List catchClauses() {
	return this.catchClauses;
	}

	/**
	* Returns the finally block of this try statement, or <code>null</code> if
	* this try statement has <b>no</b> finally block.
	*
	* @return the finally block, or <code>null</code> if this try statement
	* has none
	*/
	public Block getFinally() {
	return this.optionalFinallyBody;
	}

	/**
	* Sets or clears the finally block of this try statement.
	*
	* @param block the finally block 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 setFinally(Block block) {
	ASTNode oldChild = this.optionalFinallyBody;
	preReplaceChild(oldChild, block, FINALLY_PROPERTY);
	this.optionalFinallyBody = block;
	postReplaceChild(oldChild, block, FINALLY_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.body == null ? 0 : getBody().treeSize())
	+ this.catchClauses.listSize()
	+ (this.optionalFinallyBody == null ? 0 : getFinally().treeSize());
	}
	}