| /* |
| * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.nashorn.internal.ir; |
| |
| import java.util.List; |
| import jdk.nashorn.internal.ir.visitor.NodeVisitor; |
| |
| /** |
| * Represents a block used as a statement. |
| */ |
| public class BlockStatement extends Statement { |
| private static final long serialVersionUID = 1L; |
| |
| /** Block to execute. */ |
| private final Block block; |
| |
| /** |
| * Constructor |
| * |
| * @param block the block to execute |
| */ |
| public BlockStatement(final Block block) { |
| this(block.getFirstStatementLineNumber(), block); |
| } |
| |
| /** |
| * Constructor |
| * |
| * @param lineNumber line number |
| * @param block the block to execute |
| */ |
| public BlockStatement(final int lineNumber, final Block block) { |
| super(lineNumber, block.getToken(), block.getFinish()); |
| this.block = block; |
| } |
| |
| private BlockStatement(final BlockStatement blockStatement, final Block block) { |
| super(blockStatement); |
| this.block = block; |
| } |
| |
| /** |
| * Use this method to create a block statement meant to replace a single statement. |
| * @param stmt the statement to replace |
| * @param newStmts the statements for the new block statement |
| * @return a block statement with the new statements. It will have the line number, token, and finish of the |
| * original statement. |
| */ |
| public static BlockStatement createReplacement(final Statement stmt, final List<Statement> newStmts) { |
| return createReplacement(stmt, stmt.getFinish(), newStmts); |
| } |
| |
| /** |
| * Use this method to create a block statement meant to replace a single statement. |
| * @param stmt the statement to replace |
| * @param finish the new finish for the block |
| * @param newStmts the statements for the new block statement |
| * @return a block statement with the new statements. It will have the line number, and token of the |
| * original statement. |
| */ |
| public static BlockStatement createReplacement(final Statement stmt, final int finish, final List<Statement> newStmts) { |
| return new BlockStatement(stmt.getLineNumber(), new Block(stmt.getToken(), finish, newStmts)); |
| } |
| |
| @Override |
| public boolean isTerminal() { |
| return block.isTerminal(); |
| } |
| |
| @Override |
| public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { |
| if (visitor.enterBlockStatement(this)) { |
| return visitor.leaveBlockStatement(setBlock((Block)block.accept(visitor))); |
| } |
| |
| return this; |
| } |
| |
| @Override |
| public void toString(final StringBuilder sb, final boolean printType) { |
| block.toString(sb, printType); |
| } |
| |
| /** |
| * Return the block to be executed |
| * @return the block |
| */ |
| public Block getBlock() { |
| return block; |
| } |
| |
| /** |
| * Reset the block to be executed |
| * @param block the block |
| * @return new or same execute node |
| */ |
| public BlockStatement setBlock(final Block block) { |
| if (this.block == block) { |
| return this; |
| } |
| return new BlockStatement(this, block); |
| } |
| } |