/**
* 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 storm.trident.tuple;
import backtype.storm.tuple.Fields;
import backtype.storm.tuple.Tuple;
import clojure.lang.IPersistentVector;
import clojure.lang.PersistentVector;
import clojure.lang.RT;
import java.util.AbstractList;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.Arrays;
//extends abstractlist so that it can be emitted directly as Storm tuples
public class TridentTupleView extends AbstractList<Object> implements TridentTuple {
ValuePointer[] _index;
Map<String, ValuePointer> _fieldIndex;
IPersistentVector _delegates;
public static class ProjectionFactory implements Factory {
Map<String, ValuePointer> _fieldIndex;
ValuePointer[] _index;
Factory _parent;
public ProjectionFactory(Factory parent, Fields projectFields) {
_parent = parent;
if(projectFields==null) projectFields = new Fields();
Map<String, ValuePointer> parentFieldIndex = parent.getFieldIndex();
_fieldIndex = new HashMap<>();
for(String f: projectFields) {
_fieldIndex.put(f, parentFieldIndex.get(f));
}
_index = ValuePointer.buildIndex(projectFields, _fieldIndex);
}
public TridentTuple create(TridentTuple parent) {
if(_index.length==0) return EMPTY_TUPLE;
else return new TridentTupleView(((TridentTupleView)parent)._delegates, _index, _fieldIndex);
}
@Override
public Map<String, ValuePointer> getFieldIndex() {
return _fieldIndex;
}
@Override
public int numDelegates() {
return _parent.numDelegates();
}
@Override
public List<String> getOutputFields() {
return indexToFieldsList(_index);
}
}
public static class FreshOutputFactory implements Factory {
Map<String, ValuePointer> _fieldIndex;
ValuePointer[] _index;
public FreshOutputFactory(Fields selfFields) {
_fieldIndex = new HashMap<>();
for(int i=0; i<selfFields.size(); i++) {
String field = selfFields.get(i);
_fieldIndex.put(field, new ValuePointer(0, i, field));
}
_index = ValuePointer.buildIndex(selfFields, _fieldIndex);
}
public TridentTuple create(List<Object> selfVals) {
return new TridentTupleView(PersistentVector.EMPTY.cons(selfVals), _index, _fieldIndex);
}
@Override
public Map<String, ValuePointer> getFieldIndex() {
return _fieldIndex;
}
@Override
public int numDelegates() {
return 1;
}
@Override
public List<String> getOutputFields() {
return indexToFieldsList(_index);
}
}
public static class OperationOutputFactory implements Factory {
Map<String, ValuePointer> _fieldIndex;
ValuePointer[] _index;
Factory _parent;
public OperationOutputFactory(Factory parent, Fields selfFields) {
_parent = parent;
_fieldIndex = new HashMap<>(parent.getFieldIndex());
int myIndex = parent.numDelegates();
for(int i=0; i<selfFields.size(); i++) {
String field = selfFields.get(i);
_fieldIndex.put(field, new ValuePointer(myIndex, i, field));
}
List<String> myOrder = new ArrayList<>(parent.getOutputFields());
Set<String> parentFieldsSet = new HashSet<>(myOrder);
for(String f: selfFields) {
if(parentFieldsSet.contains(f)) {
throw new IllegalArgumentException(
"Additive operations cannot add fields with same name as already exists. "
+ "Tried adding " + selfFields + " to " + parent.getOutputFields());
}
myOrder.add(f);
}
_index = ValuePointer.buildIndex(new Fields(myOrder), _fieldIndex);
}
public TridentTuple create(TridentTupleView parent, List<Object> selfVals) {
IPersistentVector curr = parent._delegates;
curr = (IPersistentVector) RT.conj(curr, selfVals);
return new TridentTupleView(curr, _index, _fieldIndex);
}
@Override
public Map<String, ValuePointer> getFieldIndex() {
return _fieldIndex;
}
@Override
public int numDelegates() {
return _parent.numDelegates() + 1;
}
@Override
public List<String> getOutputFields() {
return indexToFieldsList(_index);
}
}
public static class RootFactory implements Factory {
ValuePointer[] index;
Map<String, ValuePointer> fieldIndex;
public RootFactory(Fields inputFields) {
index = new ValuePointer[inputFields.size()];
int i=0;
for(String f: inputFields) {
index[i] = new ValuePointer(0, i, f);
i++;
}
fieldIndex = ValuePointer.buildFieldIndex(index);
}
public TridentTuple create(Tuple parent) {
return new TridentTupleView(PersistentVector.EMPTY.cons(parent.getValues()), index, fieldIndex);
}
@Override
public Map<String, ValuePointer> getFieldIndex() {
return fieldIndex;
}
@Override
public int numDelegates() {
return 1;
}
@Override
public List<String> getOutputFields() {
return indexToFieldsList(this.index);
}
}
private static List<String> indexToFieldsList(ValuePointer[] index) {
List<String> ret = new ArrayList<>();
for(ValuePointer p: index) {
ret.add(p.field);
}
return ret;
}
public static final TridentTupleView EMPTY_TUPLE = new TridentTupleView(null, new ValuePointer[0], new HashMap());
// index and fieldIndex are precomputed, delegates built up over many operations using persistent data structures
public TridentTupleView(IPersistentVector delegates, ValuePointer[] index, Map<String, ValuePointer> fieldIndex) {
_delegates = delegates;
_index = index;
_fieldIndex = fieldIndex;
}
public static TridentTuple createFreshTuple(Fields fields, List<Object> values) {
FreshOutputFactory factory = new FreshOutputFactory(fields);
return factory.create(values);
}
public static TridentTuple createFreshTuple(Fields fields, Object... values) {
FreshOutputFactory factory = new FreshOutputFactory(fields);
return factory.create(Arrays.asList(values));
}
@Override
public List<Object> getValues() {
return this;
}
@Override
public int size() {
return _index.length;
}
@Override
public boolean contains(String field) {
return getFields().contains(field);
}
@Override
public Fields getFields() {
return new Fields(indexToFieldsList(_index));
}
@Override
public int fieldIndex(String field) {
return getFields().fieldIndex(field);
}
@Override
public List<Object> select(Fields selector) {
return getFields().select(selector, getValues());
}
@Override
public Object get(int i) {
return getValue(i);
}
@Override
public Object getValue(int i) {
return getValueByPointer(_index[i]);
}
@Override
public String getString(int i) {
return (String) getValue(i);
}
@Override
public Integer getInteger(int i) {
return (Integer) getValue(i);
}
@Override
public Long getLong(int i) {
return (Long) getValue(i);
}
@Override
public Boolean getBoolean(int i) {
return (Boolean) getValue(i);
}
@Override
public Short getShort(int i) {
return (Short) getValue(i);
}
@Override
public Byte getByte(int i) {
return (Byte) getValue(i);
}
@Override
public Double getDouble(int i) {
return (Double) getValue(i);
}
@Override
public Float getFloat(int i) {
return (Float) getValue(i);
}
@Override
public byte[] getBinary(int i) {
return (byte[]) getValue(i);
}
@Override
public Object getValueByField(String field) {
return getValueByPointer(_fieldIndex.get(field));
}
@Override
public String getStringByField(String field) {
return (String) getValueByField(field);
}
@Override
public Integer getIntegerByField(String field) {
return (Integer) getValueByField(field);
}
@Override
public Long getLongByField(String field) {
return (Long) getValueByField(field);
}
@Override
public Boolean getBooleanByField(String field) {
return (Boolean) getValueByField(field);
}
@Override
public Short getShortByField(String field) {
return (Short) getValueByField(field);
}
@Override
public Byte getByteByField(String field) {
return (Byte) getValueByField(field);
}
@Override
public Double getDoubleByField(String field) {
return (Double) getValueByField(field);
}
@Override
public Float getFloatByField(String field) {
return (Float) getValueByField(field);
}
@Override
public byte[] getBinaryByField(String field) {
return (byte[]) getValueByField(field);
}
private Object getValueByPointer(ValuePointer ptr) {
return ((List<Object>)_delegates.nth(ptr.delegateIndex)).get(ptr.index);
}
}