001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements. See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership. The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License. You may obtain a copy of the License at
009 *
010 * http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied. See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019
020 package org.apache.isis.core.progmodel.facets.object.encodeable;
021
022 import org.apache.isis.applib.adapters.EncoderDecoder;
023 import org.apache.isis.core.commons.ensure.Assert;
024 import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
025 import org.apache.isis.core.metamodel.adapter.map.AdapterMap;
026 import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
027 import org.apache.isis.core.metamodel.facetapi.FacetHolder;
028 import org.apache.isis.core.metamodel.facets.object.encodeable.EncodableFacet;
029 import org.apache.isis.core.metamodel.runtimecontext.DependencyInjector;
030
031 public class EncodableFacetUsingEncoderDecoder extends FacetAbstract implements EncodableFacet {
032
033 private final EncoderDecoder encoderDecoder;
034 private final DependencyInjector dependencyInjector;
035 private final AdapterMap adapterManager;
036
037 public EncodableFacetUsingEncoderDecoder(final EncoderDecoder encoderDecoder, final FacetHolder holder,
038 final AdapterMap adapterManager, final DependencyInjector dependencyInjector) {
039 super(EncodableFacet.class, holder, false);
040 this.encoderDecoder = encoderDecoder;
041 this.dependencyInjector = dependencyInjector;
042 this.adapterManager = adapterManager;
043 }
044
045 // TODO: is this safe? really?
046 public static String ENCODED_NULL = "NULL";
047
048 @Override
049 protected String toStringValues() {
050 getDependencyInjector().injectDependenciesInto(encoderDecoder);
051 return encoderDecoder.toString();
052 }
053
054 @Override
055 public ObjectAdapter fromEncodedString(final String encodedData) {
056 Assert.assertNotNull(encodedData);
057 if (ENCODED_NULL.equals(encodedData)) {
058 return null;
059 } else {
060 getDependencyInjector().injectDependenciesInto(encoderDecoder);
061 final Object decodedObject = encoderDecoder.fromEncodedString(encodedData);
062 return getAdapterManager().adapterFor(decodedObject);
063 }
064
065 }
066
067 @Override
068 public String toEncodedString(final ObjectAdapter object) {
069 getDependencyInjector().injectDependenciesInto(encoderDecoder);
070 return object == null ? ENCODED_NULL : encoderDecoder.toEncodedString(object.getObject());
071 }
072
073 // //////////////////////////////////////////////////////
074 // Dependencies (from constructor)
075 // //////////////////////////////////////////////////////
076
077 public DependencyInjector getDependencyInjector() {
078 return dependencyInjector;
079 }
080
081 public AdapterMap getAdapterManager() {
082 return adapterManager;
083 }
084
085 }