/*
* 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.isis.runtimes.dflt.runtime.memento;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.Map;
import org.apache.isis.core.commons.encoding.DataInputExtended;
import org.apache.isis.core.commons.encoding.DataOutputExtended;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.facets.object.encodeable.EncodableFacet;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
import org.apache.isis.runtimes.dflt.runtime.system.context.IsisContext;
public class StandaloneData extends Data {
private static final long serialVersionUID = 1L;
private static enum As {
ENCODED_STRING(0), SERIALIZABLE(1);
static Map<Integer, As> cache = new HashMap<Integer, As>();
static {
for (final As as : values()) {
cache.put(as.idx, as);
}
}
private final int idx;
private As(final int idx) {
this.idx = idx;
}
static As get(final int idx) {
return cache.get(idx);
}
public static As readFrom(final DataInputExtended input) throws IOException {
return get(input.readByte());
}
public void writeTo(final DataOutputExtended output) throws IOException {
output.writeByte(idx);
}
}
private String objectAsEncodedString;
private Serializable objectAsSerializable;
public StandaloneData(final ObjectAdapter adapter) {
super(null, adapter.getResolveState().name(), adapter.getSpecification().getFullIdentifier());
final Object object = adapter.getObject();
if (object instanceof Serializable) {
this.objectAsSerializable = (Serializable) object;
initialized();
return;
}
final EncodableFacet encodeableFacet = adapter.getSpecification().getFacet(EncodableFacet.class);
if (encodeableFacet != null) {
this.objectAsEncodedString = encodeableFacet.toEncodedString(adapter);
initialized();
return;
}
throw new IllegalArgumentException("Object wrapped by standalone adapter is not serializable and its specificatoin does not have an EncodeableFacet");
}
public StandaloneData(final DataInputExtended input) throws IOException {
super(input);
final As as = As.readFrom(input);
if (as == As.SERIALIZABLE) {
this.objectAsSerializable = input.readSerializable(Serializable.class);
} else {
this.objectAsEncodedString = input.readUTF();
}
initialized();
}
@Override
public void encode(final DataOutputExtended output) throws IOException {
super.encode(output);
if (objectAsSerializable != null) {
As.SERIALIZABLE.writeTo(output);
output.writeSerializable(objectAsSerializable);
} else {
As.ENCODED_STRING.writeTo(output);
output.writeUTF(objectAsEncodedString);
}
}
private void initialized() {
// nothing to do
}
// ///////////////////////////////////////////////////////
//
// ///////////////////////////////////////////////////////
public ObjectAdapter getAdapter() {
if (objectAsSerializable != null) {
return IsisContext.getPersistenceSession().getAdapterManager().adapterFor(objectAsSerializable);
} else {
final ObjectSpecification spec = IsisContext.getSpecificationLoader().loadSpecification(getClassName());
final EncodableFacet encodeableFacet = spec.getFacet(EncodableFacet.class);
return encodeableFacet.fromEncodedString(objectAsEncodedString);
}
}
}