import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
public Stream multiReduce(List<Fields> inputFields, List<GroupedStream> groupedStreams, GroupedMultiReducer function, Fields outputFields) {
    List<Fields> fullInputFields = new ArrayList<Fields>();
    List<Stream> streams = new ArrayList<Stream>();
    List<Fields> fullGroupFields = new ArrayList<Fields>();
    for(int i=0; i<groupedStreams.size(); i++) {
        GroupedStream gs = groupedStreams.get(i);
        Fields groupFields = gs.getGroupFields();
        fullGroupFields.add(groupFields);
        streams.add(gs.toStream().partitionBy(groupFields));
        fullInputFields.add(TridentUtils.fieldsUnion(groupFields, inputFields.get(i)));
        
    }
    return multiReduce(fullInputFields, streams, new GroupedMultiReducerExecutor(function, fullGroupFields, inputFields), outputFields);
}
 

import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
private static List<GroupedStream> groupedStreams(List<Stream> streams, List<Fields> joinFields) {
    List<GroupedStream> ret = new ArrayList<GroupedStream>();
    for(int i=0; i<streams.size(); i++) {
        ret.add(streams.get(i).groupBy(joinFields.get(i)));
    }
    return ret;
}
 

import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
public Stream multiReduce(List<Fields> inputFields, List<GroupedStream> groupedStreams, GroupedMultiReducer function, Fields outputFields) {
    List<Fields> fullInputFields = new ArrayList<>();
    List<Stream> streams = new ArrayList<>();
    List<Fields> fullGroupFields = new ArrayList<>();
    for(int i=0; i<groupedStreams.size(); i++) {
        GroupedStream gs = groupedStreams.get(i);
        Fields groupFields = gs.getGroupFields();
        fullGroupFields.add(groupFields);
        streams.add(gs.toStream().partitionBy(groupFields));
        fullInputFields.add(TridentUtils.fieldsUnion(groupFields, inputFields.get(i)));
        
    }
    return multiReduce(fullInputFields, streams, new GroupedMultiReducerExecutor(function, fullGroupFields, inputFields), outputFields);
}
 

import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
private static List<GroupedStream> groupedStreams(List<Stream> streams, List<Fields> joinFields) {
    List<GroupedStream> ret = new ArrayList<>();
    for(int i=0; i<streams.size(); i++) {
        ret.add(streams.get(i).groupBy(joinFields.get(i)));
    }
    return ret;
}
 

import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
public GroupedStream groupBy(Fields fields) {
    projectionValidation(fields);
    return new GroupedStream(this, fields);        
}
 

import storm.trident.fluent.GroupedStream; //导入依赖的package包/类
public GroupedStream groupBy(Fields fields) {
    projectionValidation(fields);
    return new GroupedStream(this, fields);
}