/**
 * 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 org.apache.curator.framework.imps;

import com.google.common.collect.Lists;
import org.apache.curator.framework.api.transaction.OperationType;
import org.apache.curator.framework.api.transaction.TypeAndPath;
import org.apache.zookeeper.MultiTransactionRecord;
import org.apache.zookeeper.Op;
import java.security.MessageDigest;
import java.util.List;

class CuratorMultiTransactionRecord extends MultiTransactionRecord
{
    private final List<TypeAndPath>     metadata = Lists.newArrayList();

    @Override
    public final void add(Op op)
    {
        throw new UnsupportedOperationException();
    }

    void add(Op op, OperationType type, String forPath)
    {
        super.add(op);
        metadata.add(new TypeAndPath(type, forPath));
    }

    TypeAndPath     getMetadata(int index)
    {
        return metadata.get(index);
    }

    int             metadataSize()
    {
        return metadata.size();
    }

    void addToDigest(MessageDigest digest)
    {
        for ( Op op : this )
        {
            digest.update(op.getPath().getBytes());
            digest.update(Integer.toString(op.getType()).getBytes());
            digest.update(op.toRequestRecord().toString().getBytes());
        }
    }
}
