org.apache.apex.malhar.lib.window.accumulation.PojoFullOuterJoin.java Source code

Introduction

Here is the source code for org.apache.apex.malhar.lib.window.accumulation.PojoFullOuterJoin.java

Source

/**
 * 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.apex.malhar.lib.window.accumulation;

import java.util.Collection;
import java.util.List;
import java.util.Map;

import org.apache.apex.malhar.lib.util.KeyValPair;
import org.apache.apex.malhar.lib.util.PojoUtils;
import org.apache.hadoop.classification.InterfaceStability;

import com.google.common.base.Throwables;
import com.google.common.collect.Multimap;

/**
 * Full outer join Accumulation for Pojo Streams.
 *
 *
 * @since 3.7.0
 */
@InterfaceStability.Evolving
public class PojoFullOuterJoin<InputT1, InputT2> extends AbstractPojoJoin<InputT1, InputT2> {
    public PojoFullOuterJoin() {
        super();
    }

    public PojoFullOuterJoin(Class<?> outClass, String[] leftKeys, String[] rightKeys) {
        super(outClass, leftKeys, rightKeys);
    }

    public PojoFullOuterJoin(Class<?> outClass, String[] leftKeys, String[] rightKeys,
            Map<String, KeyValPair<STREAM, String>> outputToInputMap) {
        super(outClass, leftKeys, rightKeys, outputToInputMap);
    }

    @Override
    public void addNonMatchingResult(Collection<Object> left, Map<String, PojoUtils.Getter> leftGettersStream,
            List<Object> result) {
        for (Object lObj : left) {
            Object o;
            try {
                o = outClass.newInstance();
            } catch (Throwable e) {
                throw Throwables.propagate(e);
            }
            if (outputToInputMap != null) {
                for (Map.Entry<String, KeyValPair<STREAM, String>> entry : outputToInputMap.entrySet()) {
                    if (entry.getValue().getKey() == STREAM.LEFT) {
                        setters.get(entry.getKey()).set(o,
                                leftGettersStream.get(entry.getValue().getValue()).get(lObj));
                    }
                }
            } else {
                setObjectForResult(leftGettersStream, lObj, o);
            }
            result.add(o);
        }
    }

    @Override
    public void addNonMatchingRightStream(Multimap<List<Object>, Object> rightStream,
            Map<String, PojoUtils.Getter> rightGettersStream, List<Object> result) {
        for (Object key : rightStream.keySet()) {
            if (outputToInputMap == null) {
                addNonMatchingResult(rightStream.get((List) key), rightGettersStream, result);
            } else {
                for (Object obj : rightStream.get((List) key)) {
                    Object o;
                    try {
                        o = outClass.newInstance();
                    } catch (Throwable e) {
                        throw Throwables.propagate(e);
                    }
                    for (Map.Entry<String, KeyValPair<STREAM, String>> entry : outputToInputMap.entrySet()) {
                        if (entry.getValue().getKey() == STREAM.RIGHT) {
                            setters.get(entry.getKey()).set(o,
                                    rightGettersStream.get(entry.getValue().getValue()).get(obj));
                        }
                    }
                    result.add(o);
                }
            }
        }
    }

    @Override
    public int getLeftStreamIndex() {
        return 0;
    }
}