| package org.apache.usergrid.persistence.collection.serialization.impl;/* |
| * 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. |
| */ |
| |
| |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.usergrid.persistence.collection.serialization.UniqueValue; |
| import org.apache.usergrid.persistence.collection.serialization.UniqueValueSet; |
| |
| |
| public class UniqueValueSetImpl implements UniqueValueSet { |
| |
| private final Map<String, UniqueValue> values; |
| |
| public UniqueValueSetImpl(final int expectedMaxSize) { |
| values = new HashMap<>(expectedMaxSize); |
| } |
| |
| |
| public void addValue(UniqueValue value){ |
| values.putIfAbsent( value.getField().getName(), value ); |
| // ^^ putIfAbsent important here as CQL returns column values differently than Asytanax/thrift due to CQL not |
| // having a 'column range' for each row slice and all columns are returned. We don't want to overwrite the |
| // first column values retrieved |
| |
| } |
| |
| @Override |
| public UniqueValue getValue( final String fieldName ) { |
| return values.get( fieldName ); |
| } |
| |
| |
| @Override |
| public Iterator<UniqueValue> iterator() { |
| return new UniqueValueIterator(values.entrySet()); |
| } |
| |
| |
| /** |
| * Inner class of unique value iterator |
| */ |
| private static final class |
| UniqueValueIterator implements Iterator<UniqueValue>{ |
| |
| private final Iterator<Map.Entry<String, UniqueValue>> sourceIterator; |
| |
| public UniqueValueIterator( final Set<Map.Entry<String, UniqueValue>> entries ) { |
| this.sourceIterator = entries.iterator(); |
| } |
| |
| |
| @Override |
| public boolean hasNext() { |
| return sourceIterator.hasNext(); |
| } |
| |
| |
| @Override |
| public UniqueValue next() { |
| return sourceIterator.next().getValue(); |
| } |
| |
| |
| @Override |
| public void remove() { |
| throw new UnsupportedOperationException( "Remove is unsupported" ); |
| } |
| } |
| } |