| /******************************************************************************* |
| * 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; |
| |
| /** |
| * Switch statement AST node type. |
| * <p> |
| * <pre> |
| * SwitchStatement: |
| * <b>switch</b> <b>(</b> Expression <b>)</b> |
| * <b>{</b> { SwitchCase | Statement } } <b>}</b> |
| * SwitchCase: |
| * <b>case</b> Expression <b>:</b> |
| * <b>default</b> <b>:</b> |
| * </pre> |
| * <code>SwitchCase</code> nodes are treated as a kind of |
| * <code>Statement</code>. |
| * </p> |
| * |
| * @since 2.0 |
| */ |
| public class SwitchStatement extends Statement { |
| |
| /** |
| * The expression; lazily initialized; defaults to a unspecified, but legal, |
| * expression. |
| */ |
| private Expression expression = null; |
| |
| /** |
| * The statements and SwitchCase nodes |
| * (element type: <code>Statement</code>). |
| * Defaults to an empty list. |
| */ |
| private ASTNode.NodeList statements = |
| new ASTNode.NodeList(true, Statement.class); |
| |
| /** |
| * Creates a new unparented switch statement node owned by the given |
| * AST. By default, the swicth statement has an unspecified, but legal, |
| * expression, and an empty list of switch groups. |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| SwitchStatement(AST ast) { |
| super(ast); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| public int getNodeType() { |
| return SWITCH_STATEMENT; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone(AST target) { |
| SwitchStatement result = new SwitchStatement(target); |
| result.setSourceRange(this.getStartPosition(), this.getLength()); |
| result.copyLeadingComment(this); |
| result.setExpression((Expression) getExpression().clone(target)); |
| result.statements().addAll(ASTNode.copySubtrees(target, statements())); |
| 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, getExpression()); |
| acceptChildren(visitor, statements); |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the expression of this switch statement. |
| * |
| * @return the expression node |
| */ |
| public Expression getExpression() { |
| if (expression == null) { |
| // lazy initialize - use setter to ensure parent link set too |
| long count = getAST().modificationCount(); |
| setExpression(new SimpleName(getAST())); |
| getAST().setModificationCount(count); |
| } |
| return expression; |
| } |
| |
| /** |
| * Sets the expression of this switch statement. |
| * |
| * @param expression the new 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(); |
| } |
| // a SwitchStatement may occur inside an Expression |
| // must check cycles |
| replaceChild(this.expression, expression, true); |
| this.expression = expression; |
| } |
| |
| /** |
| * Returns the live ordered list of statements for this switch statement. |
| * Within this list, <code>SwitchCase</code> nodes mark the start of |
| * the switch groups. |
| * |
| * @return the live list of switch group nodes |
| * (element type: <code>SwitchGroups</code>) |
| */ |
| public List statements() { |
| return statements; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| return super.memSize() + 2 * 4; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return |
| memSize() |
| + (expression == null ? 0 : getExpression().treeSize()) |
| + statements.listSize(); |
| } |
| } |