/*
* 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.objectvalue.mustsatisfyspec;
import java.util.List;
import org.apache.isis.applib.services.i18n.TranslatableString;
import org.apache.isis.applib.services.i18n.TranslationService;
import org.apache.isis.applib.spec.Specification;
import org.apache.isis.applib.spec.Specification2;
import org.apache.isis.applib.util.ReasonBuffer;
/**
* Encapsulates the algorithm for evaluating {@link Specification}s that might optionally be
* translatable (ie extend {@link Specification2}).
*/
public class SpecificationEvaluator {
private final TranslationService translationService;
private final String translationContext;
public SpecificationEvaluator(
final TranslationService translationService,
final String translationContext) {
this.translationService = translationService;
this.translationContext = translationContext;
}
public Evaluation evaluation() {
return new Evaluation();
}
public class Evaluation {
final ReasonBuffer reasonBuffer = new ReasonBuffer();
public Evaluation evaluate(final List<Specification> specifications, final Object proposedObject) {
for (final Specification specification : specifications) {
evaluate(specification, proposedObject);
}
return this;
}
public Evaluation evaluate(final Specification specification, final Object proposedObject) {
if (specification instanceof Specification2) {
final Specification2 specification2 = (Specification2) specification;
final TranslatableString translatableReason = specification2.satisfiesTranslatable(proposedObject);
if (translatableReason != null) {
final String translatedReason = translatableReason.translate(translationService, translationContext);
reasonBuffer.append(translatedReason);
}
} else {
final String satisfies = specification.satisfies(proposedObject);
reasonBuffer.append(satisfies);
}
return this;
}
public String getReason() {
return reasonBuffer.getReason();
}
}
}