/*
* Copyright 2013 the original author or authors.
*
* 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 org.gradle.internal.serialize;
import com.google.common.base.Objects;
import java.util.LinkedHashMap;
import java.util.Map;
public class MapSerializer<U, V> extends AbstractSerializer<Map<U, V>> {
private final Serializer<U> keySerializer;
private final Serializer<V> valueSerializer;
public MapSerializer(Serializer<U> keySerializer, Serializer<V> valueSerializer) {
this.keySerializer = keySerializer;
this.valueSerializer = valueSerializer;
}
public Map<U, V> read(Decoder decoder) throws Exception {
int size = decoder.readInt();
Map<U, V> valueMap = new LinkedHashMap<U, V>(size);
for (int i = 0; i < size; i++) {
U key = keySerializer.read(decoder);
V value = valueSerializer.read(decoder);
valueMap.put(key, value);
}
return valueMap;
}
public void write(Encoder encoder, Map<U, V> value) throws Exception {
encoder.writeInt(value.size());
for (Map.Entry<U, V> entry : value.entrySet()) {
keySerializer.write(encoder, entry.getKey());
valueSerializer.write(encoder, entry.getValue());
}
}
@Override
public boolean equals(Object obj) {
if (!super.equals(obj)) {
return false;
}
MapSerializer rhs = (MapSerializer) obj;
return Objects.equal(keySerializer, rhs.keySerializer)
&& Objects.equal(valueSerializer, rhs.valueSerializer);
}
@Override
public int hashCode() {
return Objects.hashCode(super.hashCode(), keySerializer, valueSerializer);
}
}