| /******************************************************************************* |
| * Copyright (c) 2000, 2003 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.List; |
| |
| /** |
| * Try statement AST node type. |
| * |
| * <pre> |
| * TryStatement: |
| * <b>try</b> Block |
| * { CatchClause } |
| * [ <b>finally</b> Block ] |
| * </pre> |
| * |
| * @since 2.0 |
| */ |
| public class TryStatement extends Statement { |
| |
| /** |
| * 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(true, CatchClause.class); |
| |
| /** |
| * 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. |
| */ |
| public int getNodeType() { |
| return TRY_STATEMENT; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone(AST target) { |
| TryStatement result = new TryStatement(target); |
| result.setSourceRange(this.getStartPosition(), this.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. |
| */ |
| public boolean subtreeMatch(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, catchClauses); |
| acceptChild(visitor, getFinally()); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the body of this try statement. |
| * |
| * @return the try body |
| */ |
| public Block getBody() { |
| if (body == null) { |
| // lazy initialize - use setter to ensure parent link set too |
| long count = getAST().modificationCount(); |
| setBody(new Block(getAST())); |
| getAST().setModificationCount(count); |
| } |
| return 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(); |
| } |
| // a TryStatement may occur in a Block - must check cycles |
| replaceChild(this.body, body, true); |
| this.body = body; |
| } |
| |
| /** |
| * 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 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 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) { |
| // a TryStatement may occur in a Block - must check cycles |
| replaceChild(this.optionalFinallyBody, block, true); |
| this.optionalFinallyBody = block; |
| } |
| |
| /* (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() |
| + (body == null ? 0 : getBody().treeSize()) |
| + catchClauses.listSize() |
| + (optionalFinallyBody == null ? 0 : getFinally().treeSize()); |
| } |
| } |