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Phoenix Mapreduce JAR for use with the "hbase mapredcp" classpath

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/*
 * 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.phoenix.coprocessorclient;

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.List;

import org.apache.hadoop.io.WritableUtils;
import org.apache.phoenix.coprocessor.generated.PTableProtos;
import org.apache.phoenix.expression.Expression;
import org.apache.phoenix.expression.ExpressionType;
import org.apache.phoenix.schema.PTable;
import org.apache.phoenix.schema.PTableImpl;

public class UngroupedAggregateRegionObserverHelper {
    public static byte[] serialize(PTable projectedTable) {
        PTableProtos.PTable ptableProto = PTableImpl.toProto(projectedTable);
        return ptableProto.toByteArray();
    }

    public static byte[] serialize(List selectExpressions) {
        ByteArrayOutputStream stream = new ByteArrayOutputStream();
        try {
            DataOutputStream output = new DataOutputStream(stream);
            WritableUtils.writeVInt(output, selectExpressions.size());
            for (int i = 0; i < selectExpressions.size(); i++) {
                Expression expression = selectExpressions.get(i);
                WritableUtils.writeVInt(output, ExpressionType.valueOf(expression).ordinal());
                expression.write(output);
            }
            return stream.toByteArray();
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            try {
                stream.close();
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }
}