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
020package org.apache.isis.core.progmodel.facets.object.parseable;
021
022import org.apache.isis.applib.adapters.Parser;
023import org.apache.isis.applib.profiles.Localization;
024import org.apache.isis.core.commons.authentication.AuthenticationSessionProvider;
025import org.apache.isis.core.commons.lang.ClassExtensions;
026import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
027import org.apache.isis.core.metamodel.adapter.mgr.AdapterManager;
028import org.apache.isis.core.metamodel.deployment.DeploymentCategory;
029import org.apache.isis.core.metamodel.facetapi.FacetAbstract;
030import org.apache.isis.core.metamodel.facetapi.FacetHolder;
031import org.apache.isis.core.metamodel.facets.object.parseable.ParseableFacet;
032import org.apache.isis.core.metamodel.runtimecontext.ServicesInjector;
033
034public abstract class ParseableFacetAbstract extends FacetAbstract implements ParseableFacet {
035
036    private final Class<?> parserClass;
037
038    // to delegate to
039    private final ParseableFacetUsingParser parseableFacetUsingParser;
040
041    public ParseableFacetAbstract(final String candidateParserName, final Class<?> candidateParserClass, final FacetHolder holder, DeploymentCategory deploymentCategory, final AuthenticationSessionProvider authenticationSessionProvider, final ServicesInjector dependencyInjector, final AdapterManager adapterManager) {
042        super(ParseableFacet.class, holder, Derivation.NOT_DERIVED);
043
044        this.parserClass = ParserUtil.parserOrNull(candidateParserClass, candidateParserName);
045        this.parseableFacetUsingParser = isValid()?
046                createParser(holder, deploymentCategory, authenticationSessionProvider, dependencyInjector, adapterManager):null;
047    }
048
049    private ParseableFacetUsingParser createParser(final FacetHolder holder, DeploymentCategory deploymentCategory, final AuthenticationSessionProvider authenticationSessionProvider, final ServicesInjector dependencyInjector, final AdapterManager adapterManager) {
050        final Parser<?> parser = (Parser<?>) ClassExtensions.newInstance(parserClass, FacetHolder.class, holder);
051        return new ParseableFacetUsingParser(parser, holder, deploymentCategory, authenticationSessionProvider, dependencyInjector, adapterManager);
052    }
053
054    /**
055     * Discover whether either of the candidate parser name or class is valid.
056     */
057    public boolean isValid() {
058        return parserClass != null;
059    }
060
061    /**
062     * Guaranteed to implement the {@link Parser} class, thanks to generics in
063     * the applib.
064     */
065    public Class<?> getParserClass() {
066        return parserClass;
067    }
068
069    @Override
070    protected String toStringValues() {
071        return parserClass.getName();
072    }
073
074    @Override
075    public ObjectAdapter parseTextEntry(final ObjectAdapter original, final String entryText, final Localization localization) {
076        return parseableFacetUsingParser.parseTextEntry(original, entryText, localization);
077    }
078
079    @Override
080    public String parseableTitle(final ObjectAdapter existing) {
081        return parseableFacetUsingParser.parseableTitle(existing);
082    }
083}