/*
* 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.core.metamodel.facets.object.encodeable.encoder;
import org.apache.isis.applib.adapters.EncoderDecoder;
import org.apache.isis.core.commons.ensure.Assert;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.object.encodeable.EncodableFacet;
import org.apache.isis.core.metamodel.services.ServicesInjector;
public class EncodableFacetUsingEncoderDecoder extends FacetAbstract implements EncodableFacet {
private final EncoderDecoder<?> encoderDecoder;
private final ServicesInjector dependencyInjector;
private final AdapterManager adapterManager;
public EncodableFacetUsingEncoderDecoder(final EncoderDecoder<?> encoderDecoder, final FacetHolder holder, final AdapterManager adapterManager, final ServicesInjector dependencyInjector) {
super(EncodableFacet.class, holder, Derivation.NOT_DERIVED);
this.encoderDecoder = encoderDecoder;
this.dependencyInjector = dependencyInjector;
this.adapterManager = adapterManager;
}
// TODO: is this safe? really?
public static String ENCODED_NULL = "NULL";
@Override
protected String toStringValues() {
getDependencyInjector().injectServicesInto(encoderDecoder);
return encoderDecoder.toString();
}
@Override
public ObjectAdapter fromEncodedString(final String encodedData) {
Assert.assertNotNull(encodedData);
if (ENCODED_NULL.equals(encodedData)) {
return null;
} else {
getDependencyInjector().injectServicesInto(encoderDecoder);
final Object decodedObject = encoderDecoder.fromEncodedString(encodedData);
return getAdapterManager().adapterFor(decodedObject);
}
}
@Override
public String toEncodedString(final ObjectAdapter adapter) {
getDependencyInjector().injectServicesInto(encoderDecoder);
return adapter == null ? ENCODED_NULL: encode(encoderDecoder, adapter.getObject());
}
private static <T> String encode(final EncoderDecoder<T> encoderDecoder, final Object pojo) {
@SuppressWarnings("unchecked")
T pojoAsT = (T) pojo;
return encoderDecoder.toEncodedString(pojoAsT);
}
// //////////////////////////////////////////////////////
// Dependencies (from constructor)
// //////////////////////////////////////////////////////
public ServicesInjector getDependencyInjector() {
return dependencyInjector;
}
public AdapterManager getAdapterManager() {
return adapterManager;
}
}