com.hazelcast.map.impl.query.QueryResultIterator Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2016, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.map.impl.query;
import com.hazelcast.spi.serialization.SerializationService;
import com.hazelcast.util.IterationType;
import java.util.AbstractMap;
import java.util.Iterator;
final class QueryResultIterator implements Iterator {
private final Iterator iterator;
private final IterationType iteratorType;
private final boolean binary;
private final SerializationService serializationService;
QueryResultIterator(Iterator iterator, IterationType iteratorType, boolean binary,
SerializationService serializationService) {
this.iterator = iterator;
this.iteratorType = iteratorType;
this.binary = binary;
this.serializationService = serializationService;
}
@Override
public boolean hasNext() {
return iterator.hasNext();
}
@SuppressWarnings("unchecked")
@Override
public Object next() {
QueryResultRow row = iterator.next();
switch (iteratorType) {
case VALUE:
return binary ? row.getValue() : serializationService.toObject(row.getValue());
case KEY:
return binary ? row.getKey() : serializationService.toObject(row.getKey());
case ENTRY:
if (binary) {
return new AbstractMap.SimpleImmutableEntry(row.getKey(), row.getValue());
} else {
Object key = serializationService.toObject(row.getKey());
Object value = serializationService.toObject(row.getValue());
return new AbstractMap.SimpleImmutableEntry(key, value);
}
default:
throw new IllegalStateException("Unrecognized iteratorType:" + iteratorType);
}
}
@Override
public void remove() {
throw new UnsupportedOperationException();
}
}