/*
* Copyright 2004-2010 Brian S O'Neill
*
* 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.cojen.classfile.attribute;
import java.util.ArrayList;
import java.util.List;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.cojen.classfile.Attribute;
import org.cojen.classfile.ConstantPool;
import org.cojen.classfile.constant.ConstantClassInfo;
/**
* This class corresponds to the Exceptions_attribute structure as defined in
* <i>The Java Virtual Machine Specification</i>.
*
* @author Brian S O'Neill
*/
public class ExceptionsAttr extends Attribute {
private List<ConstantClassInfo> mExceptions = new ArrayList<ConstantClassInfo>(2);
public ExceptionsAttr(ConstantPool cp) {
super(cp, EXCEPTIONS);
}
public ExceptionsAttr(ConstantPool cp, String name) {
super(cp, name);
}
public ExceptionsAttr(ConstantPool cp, String name, int length, DataInput din)
throws IOException
{
super(cp, name);
int size = din.readUnsignedShort();
length -= 2;
for (int i=0; i<size; i++) {
int index = din.readUnsignedShort();
length -= 2;
ConstantClassInfo info = (ConstantClassInfo)cp.getConstant(index);
addException(info);
}
skipBytes(din, length);
}
public ConstantClassInfo[] getExceptions() {
return mExceptions.toArray(new ConstantClassInfo[mExceptions.size()]);
}
public void addException(ConstantClassInfo type) {
mExceptions.add(type);
}
public int getLength() {
return 2 + 2 * mExceptions.size();
}
public void writeDataTo(DataOutput dout) throws IOException {
int size = mExceptions.size();
dout.writeShort(size);
for (int i=0; i<size; i++) {
ConstantClassInfo info = mExceptions.get(i);
dout.writeShort(info.getIndex());
}
}
}