// Copyright (C) 2005 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.caja.parser.js;
import com.google.caja.lexer.FilePosition;
import com.google.caja.lexer.TokenConsumer;
import com.google.caja.parser.ParseTreeNode;
import com.google.caja.reporting.RenderContext;
import java.util.List;
/**
* An exception handler that is part of a {@link TryStmt}.
*
* @author mikesamuel@gmail.com
*/
public final class CatchStmt extends AbstractStatement {
private static final long serialVersionUID = 7105207645966261505L;
// Local member variables are only changed in childrenChanged(),
// so this class satisfies the immutability contract of the superclass.
private Declaration exception;
private Block body;
/** @param value unused. This ctor is provided for reflection. */
@ReflectiveCtor
public CatchStmt(
FilePosition pos, Void value, List<? extends ParseTreeNode> children) {
this(pos, (Declaration) children.get(0), (Block) children.get(1));
}
public CatchStmt(FilePosition pos, Declaration exception, Block body) {
super(pos, Statement.class);
createMutation()
.appendChild(exception)
.appendChild(body)
.execute();
}
@Override
protected void childrenChanged() {
super.childrenChanged();
List<? extends ParseTreeNode> children = children();
this.exception = (Declaration) children.get(0);
this.body = (Block) children.get(1);
}
public Declaration getException() { return exception; }
public Block getBody() { return body; }
@Override
public Object getValue() { return null; }
public void render(RenderContext rc) {
TokenConsumer out = rc.getOut();
out.mark(getFilePosition());
out.consume("catch");
out.consume("(");
out.mark(exception.getFilePosition());
exception.getIdentifier().render(rc);
out.consume(")");
body.renderBlock(rc, false);
}
public boolean hasHangingConditional() { return false; }
}