org.jboss.classfilewriter.attributes.ExceptionsAttribute Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
*
* Copyright 2012 Red Hat, 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 org.jboss.classfilewriter.attributes;
import org.jboss.classfilewriter.constpool.ConstPool;
import org.jboss.classfilewriter.util.ByteArrayDataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* The exceptions attribute, stores the checked exceptions a method is declared to throw
*
* @author Stuart Douglas
*
*/
public class ExceptionsAttribute extends Attribute {
public static final String NAME = "Exceptions";
private final List exceptionClasses = new ArrayList();
private final List exceptionClassIndexes = new ArrayList();
private final ConstPool constPool;
public ExceptionsAttribute(ConstPool constPool) {
super(NAME, constPool);
this.constPool = constPool;
}
public void addExceptionClass(String exception) {
exceptionClasses.add(exception);
exceptionClassIndexes.add(constPool.addClassEntry(exception));
}
@Override
public void writeData(ByteArrayDataOutputStream stream) throws IOException {
stream.writeInt(2 + exceptionClassIndexes.size() * 2);
stream.writeShort(exceptionClassIndexes.size());
for (short i : exceptionClassIndexes) {
stream.writeShort(i);
}
}
}