io.druid.query.groupby.epinephelinae.column.LongGroupByColumnSelectorStrategy.java Source code

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Here is the source code for io.druid.query.groupby.epinephelinae.column.LongGroupByColumnSelectorStrategy.java

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/*
 * Licensed to Metamarkets Group Inc. (Metamarkets) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Metamarkets 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 io.druid.query.groupby.epinephelinae.column;

import com.google.common.primitives.Longs;
import io.druid.segment.ColumnValueSelector;

import java.nio.ByteBuffer;
import java.util.Map;

public class LongGroupByColumnSelectorStrategy implements GroupByColumnSelectorStrategy {

    @Override
    public int getGroupingKeySize() {
        return Longs.BYTES;
    }

    @Override
    public void processValueFromGroupingKey(GroupByColumnSelectorPlus selectorPlus, ByteBuffer key,
            Map<String, Object> resultMap) {
        final long val = key.getLong(selectorPlus.getKeyBufferPosition());
        resultMap.put(selectorPlus.getOutputName(), val);
    }

    @Override
    public void initColumnValues(ColumnValueSelector selector, int columnIndex, Object[] valuess) {
        valuess[columnIndex] = selector.getLong();
    }

    @Override
    public Object getOnlyValue(ColumnValueSelector selector) {
        return selector.getLong();
    }

    @Override
    public void writeToKeyBuffer(int keyBufferPosition, Object obj, ByteBuffer keyBuffer) {
        keyBuffer.putLong(keyBufferPosition, (Long) obj);
    }

    @Override
    public void initGroupingKeyColumnValue(int keyBufferPosition, int columnIndex, Object rowObj,
            ByteBuffer keyBuffer, int[] stack) {
        keyBuffer.putLong(keyBufferPosition, (Long) rowObj);
        stack[columnIndex] = 1;
    }

    @Override
    public boolean checkRowIndexAndAddValueToGroupingKey(int keyBufferPosition, Object rowObj, int rowValIdx,
            ByteBuffer keyBuffer) {
        // rows from a long column always have a single value, multi-value is not currently supported
        // this method handles row values after the first in a multivalued row, so just return false
        return false;
    }
}