/*
* Copyright 2011 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.testfixtures.internal;
import org.gradle.cache.PersistentIndexedCache;
import org.gradle.internal.UncheckedException;
import org.gradle.messaging.serialize.InputStreamBackedDecoder;
import org.gradle.messaging.serialize.OutputStreamBackedEncoder;
import org.gradle.messaging.serialize.Serializer;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.util.HashMap;
import java.util.Map;
/**
* A simple in-memory cache, used by the testing fixtures.
*/
public class InMemoryIndexedCache<K, V> implements PersistentIndexedCache<K, V> {
private final Map<Object, byte[]> entries = new HashMap<Object, byte[]>();
private final Serializer<V> valueSerializer;
public InMemoryIndexedCache(Serializer<V> valueSerializer) {
this.valueSerializer = valueSerializer;
}
public V get(K key) {
byte[] serialised = entries.get(key);
if (serialised == null) {
return null;
}
try {
ByteArrayInputStream instr = new ByteArrayInputStream(serialised);
InputStreamBackedDecoder decoder = new InputStreamBackedDecoder(instr);
return valueSerializer.read(decoder);
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
}
}
public void put(K key, V value) {
ByteArrayOutputStream outstr = new ByteArrayOutputStream();
OutputStreamBackedEncoder encoder = new OutputStreamBackedEncoder(outstr);
try {
valueSerializer.write(encoder, value);
encoder.flush();
} catch (Exception e) {
throw UncheckedException.throwAsUncheckedException(e);
}
entries.put(key, outstr.toByteArray());
}
public void remove(K key) {
entries.remove(key);
}
}