/*

 * reserved comment block

 * DO NOT REMOVE OR ALTER!

 */

/**

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements. See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership. The ASF licenses this file

 * to you 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.sun.org.apache.xml.internal.security.utils;

import java.io.ByteArrayOutputStream;

import com.sun.org.apache.xml.internal.security.algorithms.MessageDigestAlgorithm;

/**

 *

 */

public class DigesterOutputStream extends ByteArrayOutputStream {

    private static final com.sun.org.slf4j.internal.Logger LOG =

        com.sun.org.slf4j.internal.LoggerFactory.getLogger(DigesterOutputStream.class);

    final MessageDigestAlgorithm mda;

    /**

     * @param mda

     */

    public DigesterOutputStream(MessageDigestAlgorithm mda) {

        this.mda = mda;

    }

    /** {@inheritDoc} */

    public void write(byte[] arg0) {

        write(arg0, 0, arg0.length);

    }

    /** {@inheritDoc} */

    public void write(int arg0) {

        mda.update((byte)arg0);

    }

    /** {@inheritDoc} */

    public void write(byte[] arg0, int arg1, int arg2) {

        if (LOG.isDebugEnabled()) {

            LOG.debug("Pre-digested input:");

            StringBuilder sb = new StringBuilder(arg2);

            for (int i = arg1; i < (arg1 + arg2); i++) {

                sb.append((char)arg0[i]);

            }

            LOG.debug(sb.toString());

        }

        mda.update(arg0, arg1, arg2);

    }

    /**

     * @return the digest value

     */

    public byte[] getDigestValue() {

        return mda.digest();

    }

}