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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 services;
import java.util.Iterator;
import java.util.Vector;
import org.osoa.sca.annotations.Reference;
public class IntermediateCollectorImpl implements IntermediateCollector {
private Vector<KeyValuePair> table = new Vector<KeyValuePair>();
@Reference
public Reducer myReducer;
public void collect(String key, int value) {
table.add(new KeyValuePair(key, value));
}
public void reducePhase() {
java.util.Collections.sort(table);
Iterator<KeyValuePair> it = table.iterator();
//no data
if(!it.hasNext()) {
return;
}
Vector<Integer> values = new Vector<Integer>();
KeyValuePair last = it.next();
values.add(last.value);
while(it.hasNext()) {
KeyValuePair curr = it.next();
if(last.compareTo(curr) == 0) {
values.add(curr.value);
last = curr;
}
else {
myReducer.reduce(last.key, values.iterator());
values.clear();
values.add(curr.value);
last = curr;
}
}
myReducer.reduce(last.key, values.iterator());
}
}
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