/*
* 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.progmodel.facets.object.title.annotation;
import java.lang.reflect.Method;
import java.util.List;
import com.google.common.base.Function;
import com.google.common.base.Strings;
import org.apache.log4j.Logger;
import org.apache.isis.applib.annotation.Title;
import org.apache.isis.applib.profiles.Localization;
import org.apache.isis.core.metamodel.adapter.LocalizationProvider;
import org.apache.isis.core.metamodel.adapter.ObjectAdapter;
import org.apache.isis.core.metamodel.adapter.map.AdapterMap;
import org.apache.isis.core.metamodel.adapter.util.AdapterInvokeUtils;
import org.apache.isis.core.metamodel.facetapi.FacetHolder;
import org.apache.isis.core.metamodel.facets.object.title.TitleFacet;
import org.apache.isis.core.metamodel.facets.object.title.TitleFacetAbstract;
import org.apache.isis.core.metamodel.spec.ObjectSpecification;
public class TitleFacetViaTitleAnnotation extends TitleFacetAbstract {
private static final Logger LOG = Logger.getLogger(TitleFacetViaTitleAnnotation.class);
private final List<TitleComponent> components;
private final AdapterMap adapterMap;
private final LocalizationProvider localizationProvider;
public static class TitleComponent {
public static final Function<? super Method, ? extends TitleComponent> FROM_METHOD = new Function<Method, TitleComponent>() {
@Override
public TitleComponent apply(final Method input) {
return TitleComponent.of(input);
}
};
private final String prepend;
private final String append;
private final Method method;
private final int abbreviateTo;
private TitleComponent(final String prepend, final String append, final Method method, final int abbreviateTo) {
super();
this.prepend = prepend;
this.append = append;
this.method = method;
this.abbreviateTo = abbreviateTo;
}
public String getPrepend() {
return prepend;
}
public String getAppend() {
return append;
}
public Method getMethod() {
return method;
}
public static TitleComponent of(final Method method) {
final Title annotation = method.getAnnotation(Title.class);
final String prepend = annotation != null ? annotation.prepend() : " ";
final String append = annotation != null ? annotation.append() : "";
final int abbreviateTo = annotation != null ? annotation.abbreviatedTo() : Integer.MAX_VALUE;
return new TitleComponent(prepend, append, method, abbreviateTo);
}
}
public TitleFacetViaTitleAnnotation(final List<TitleComponent> components, final FacetHolder holder, final AdapterMap adapterMap, final LocalizationProvider localizationProvider) {
super(holder);
this.components = components;
this.adapterMap = adapterMap;
this.localizationProvider = localizationProvider;
}
@Override
public String title(final ObjectAdapter owningAdapter, final Localization localization) {
final StringBuilder stringBuilder = new StringBuilder();
try {
for (final TitleComponent component : this.components) {
String title = null;
final Object titlePart = AdapterInvokeUtils.invoke(component.getMethod(), owningAdapter);
if (titlePart != null) {
// use either titleFacet...
title = titleOf(titlePart);
if (Strings.isNullOrEmpty(title)) {
// or the toString() otherwise
title = titlePart.toString().trim();
}
}
if (Strings.isNullOrEmpty(title)) {
continue;
}
if (stringBuilder.length() > 0) {
stringBuilder.append(component.getPrepend());
}
stringBuilder.append(abbreviated(title, component.abbreviateTo));
stringBuilder.append(component.getAppend());
}
return stringBuilder.toString().trim();
} catch (final RuntimeException ex) {
LOG.warn("Title failure", ex);
return "Failed Title";
}
}
private String titleOf(final Object domainObject) {
final ObjectAdapter adapter = adapterMap.getAdapterFor(domainObject);
if (adapter == null) {
return null;
}
final ObjectSpecification returnSpec = adapter.getSpecification();
if (!returnSpec.containsFacet(TitleFacet.class)) {
return null;
}
return returnSpec.getTitle(adapter, localizationProvider.getLocalization());
}
public List<TitleComponent> getComponents() {
return components;
}
private static String abbreviated(final String str, final int maxLength) {
return str.length() < maxLength ? str : str.substring(0, maxLength - 3) + "...";
}
}