/*
 * 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 java.io.IOException;

import org.jboss.classfilewriter.constpool.ConstPool;
import org.jboss.classfilewriter.util.ByteArrayDataOutputStream;


public class SignatureAttribute extends Attribute {

    public static final String NAME = "Signature";

    private final String signature;
    private final int signatureIndex;

    public SignatureAttribute(final ConstPool constPool, String signature) {
        super(NAME, constPool);
        this.signature = signature;
        this.signatureIndex = constPool.addUtf8Entry(signature);
    }

    @Override
    public void writeData(ByteArrayDataOutputStream stream) throws IOException {
        stream.writeInt(2); // data length
        stream.writeShort(signatureIndex);
    }
}
