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/*
* 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 jdk.nashorn.internal.ir.visitor.NodeVisitor;
import jdk.nashorn.internal.runtime.Source;
/**
* IR representation of a catch clause.
*
*/
public class CatchNode extends Node {
/** Exception identifier. */
private IdentNode exception;
/** Exception condition. */
private Node exceptionCondition;
/** Catch body. */
private Block body;
/** Is rethrow - e.g. synthetic catch block for e.g. finallies, the parser case where
* there has to be at least on catch for syntactic validity */
private boolean isSyntheticRethrow;
/**
* Constructors
*
* @param source the source
* @param token token
* @param finish finish
* @param exception variable name of exception
* @param exceptionCondition exception condition
* @param body catch body
*/
public CatchNode(final Source source, final long token, final int finish, final IdentNode exception, final Node exceptionCondition, final Block body) {
super(source, token, finish);
this.exception = exception;
this.exceptionCondition = exceptionCondition;
this.body = body;
}
private CatchNode(final CatchNode catchNode, final CopyState cs) {
super(catchNode);
this.exception = (IdentNode)cs.existingOrCopy(catchNode.exception);
this.exceptionCondition = cs.existingOrCopy(catchNode.exceptionCondition);
this.body = (Block)cs.existingOrCopy(catchNode.body);
this.isSyntheticRethrow = catchNode.isSyntheticRethrow;
}
@Override
protected Node copy(final CopyState cs) {
return new CatchNode(this, cs);
}
/**
* Assist in IR navigation.
* @param visitor IR navigating visitor.
*/
@Override
public Node accept(final NodeVisitor visitor) {
if (visitor.enterCatchNode(this) != null) {
exception = (IdentNode)exception.accept(visitor);
if (exceptionCondition != null) {
exceptionCondition = exceptionCondition.accept(visitor);
}
body = (Block)body.accept(visitor);
return visitor.leaveCatchNode(this);
}
return this;
}
@Override
public void toString(final StringBuilder sb) {
sb.append(" catch (");
exception.toString(sb);
if (exceptionCondition != null) {
sb.append(" if ");
exceptionCondition.toString(sb);
}
sb.append(')');
}
/**
* Check if this catch is a synthetic rethrow
* @return true if this is a synthetic rethrow
*/
public boolean isSyntheticRethrow() {
return isSyntheticRethrow;
}
/**
* Flag this as deliberatly generated catch all that rethrows the
* caught exception. This is used for example for generating finally
* expressions
*/
public void setIsSyntheticRethrow() {
this.isSyntheticRethrow = true;
}
/**
* Get the identifier representing the exception thrown
* @return the exception identifier
*/
public IdentNode getException() {
return exception;
}
/**
* Get the exception condition for this catch block
* @return the exception condition
*/
public Node getExceptionCondition() {
return exceptionCondition;
}
/**
* Reset the exception condition for this catch block
* @param exceptionCondition the new exception condition
*/
public void setExceptionCondition(final Node exceptionCondition) {
this.exceptionCondition = exceptionCondition;
}
/**
* Get the body for this catch block
* @return the catch block body
*/
public Block getBody() {
return body;
}
}
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