| /* |
| * 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 org.apache.geode.internal.cache; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.geode.DataSerializer; |
| import org.apache.geode.cache.Region; |
| import org.apache.geode.internal.InternalDataSerializer; |
| import org.apache.geode.internal.lang.StringUtils; |
| import org.apache.geode.internal.serialization.DataSerializableFixedID; |
| import org.apache.geode.internal.serialization.DeserializationContext; |
| import org.apache.geode.internal.serialization.KnownVersion; |
| import org.apache.geode.internal.serialization.SerializationContext; |
| |
| /** |
| * This cache deserializable always keeps its byte[] in serialized form. You can ask it for its |
| * Object in which case it always has to deserialize. So it "prefers serialization (aka bytes)". |
| * |
| * @since GemFire 5.0.2 |
| * |
| */ |
| public class PreferBytesCachedDeserializable |
| implements CachedDeserializable, DataSerializableFixedID { |
| |
| |
| /** |
| * empty constructor for serialization only |
| */ |
| public PreferBytesCachedDeserializable() {} |
| |
| |
| /** The cached value */ |
| private byte[] value; |
| |
| /** |
| * +PER_OBJECT_OVERHEAD for VMCachedDeserializable object +4 for value field |
| */ |
| static final int MEM_OVERHEAD = PER_OBJECT_OVERHEAD + 4; |
| |
| /** |
| * Creates a new instance of <code>PreferBytesCachedDeserializable</code>. |
| * |
| * Note that, in general, instances of this class should be obtained via |
| * {@link CachedDeserializableFactory}. |
| */ |
| PreferBytesCachedDeserializable(byte[] serializedValue) { |
| value = serializedValue; |
| if (serializedValue == null) { |
| throw new NullPointerException( |
| "value must not be null"); |
| } |
| } |
| |
| public PreferBytesCachedDeserializable(Object object) { |
| value = EntryEventImpl.serialize(object); |
| } |
| |
| @Override |
| public Object getDeserializedValue(Region r, RegionEntry re) { |
| return EntryEventImpl.deserialize(value); |
| } |
| |
| @Override |
| public Object getDeserializedForReading() { |
| return getDeserializedValue(null, null); |
| } |
| |
| @Override |
| public Object getDeserializedWritableCopy(Region r, RegionEntry re) { |
| return getDeserializedValue(r, re); |
| } |
| |
| /** |
| * Return the serialized value as a byte[] |
| */ |
| @Override |
| public byte[] getSerializedValue() { |
| return value; |
| } |
| |
| @Override |
| public void fillSerializedValue(BytesAndBitsForCompactor wrapper, byte userBits) { |
| wrapper.setData(value, userBits, value.length, |
| false /* Not Reusable as it refers to underlying value */); |
| } |
| |
| |
| /** |
| * Return current value regardless of whether it is serialized or deserialized: if it was |
| * serialized than it is a byte[], otherwise it is not a byte[]. |
| */ |
| @Override |
| public Object getValue() { |
| return value; |
| } |
| |
| @Override |
| public int getSizeInBytes() { |
| return MEM_OVERHEAD + CachedDeserializableFactory.getByteSize(value); |
| } |
| |
| @Override |
| public int getValueSizeInBytes() { |
| return CachedDeserializableFactory.getByteSize(value); |
| } |
| |
| @Override |
| public int getDSFID() { |
| return PREFER_BYTES_CACHED_DESERIALIZABLE; |
| } |
| |
| @Override |
| public void fromData(DataInput in, |
| DeserializationContext context) throws IOException, ClassNotFoundException { |
| value = DataSerializer.readByteArray(in); |
| } |
| |
| @Override |
| public void toData(DataOutput out, |
| SerializationContext context) throws IOException { |
| DataSerializer.writeByteArray(value, out); |
| } |
| |
| String getShortClassName() { |
| String cname = getClass().getName(); |
| return cname.substring(getClass().getPackage().getName().length() + 1); |
| } |
| |
| @Override |
| public String toString() { |
| return getShortClassName() + "@" + hashCode(); |
| } |
| |
| @Override |
| public void writeValueAsByteArray(DataOutput out) throws IOException { |
| toData(out, InternalDataSerializer.createSerializationContext(out)); |
| } |
| |
| @Override |
| public String getStringForm() { |
| try { |
| return StringUtils.forceToString(getDeserializedForReading()); |
| } catch (RuntimeException ex) { |
| return "Could not convert object to string because " + ex; |
| } |
| } |
| |
| @Override |
| public KnownVersion[] getSerializationVersions() { |
| return null; |
| } |
| |
| @Override |
| public boolean isSerialized() { |
| return true; |
| } |
| |
| @Override |
| public boolean usesHeapForStorage() { |
| return true; |
| } |
| |
| } |