/*
* Copyright 2014 the original author or authors.
*
* Licensed 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.gradle.model.internal.core;
import com.google.common.base.Function;
import com.google.common.base.Optional;
import com.google.common.collect.Iterables;
import org.gradle.api.Nullable;
import org.gradle.model.internal.core.rule.describe.ModelRuleDescriptor;
import org.gradle.model.internal.type.ModelType;
public class ChainingModelProjection implements ModelProjection {
private final Iterable<? extends ModelProjection> projections;
public ChainingModelProjection(Iterable<? extends ModelProjection> projections) {
this.projections = projections;
}
@Override
public <T> boolean canBeViewedAs(ModelType<T> type) {
for (ModelProjection projection : projections) {
if (projection.canBeViewedAs(type)) {
return true;
}
}
return false;
}
@Override
public Iterable<String> getTypeDescriptions(final MutableModelNode node) {
return Iterables.concat(Iterables.transform(projections, new Function<ModelProjection, Iterable<String>>() {
public Iterable<String> apply(ModelProjection projection) {
return projection.getTypeDescriptions(node);
}
}));
}
@Override
@Nullable
public <T> ModelView<? extends T> asImmutable(ModelType<T> type, MutableModelNode node, ModelRuleDescriptor ruleDescriptor) {
for (ModelProjection projection : projections) {
ModelView<? extends T> view = projection.asImmutable(type, node, ruleDescriptor);
if (view != null) {
return view;
}
}
return null;
}
@Nullable
@Override
public <T> ModelView<? extends T> asMutable(ModelType<T> type, MutableModelNode node, ModelRuleDescriptor ruleDescriptor) {
for (ModelProjection projection : projections) {
ModelView<? extends T> view = projection.asMutable(type, node, ruleDescriptor);
if (view != null) {
return view;
}
}
return null;
}
@Override
public Optional<String> getValueDescription(MutableModelNode modelNodeInternal) {
for (ModelProjection projection : projections) {
Optional<String> projectionValueDescription = projection.getValueDescription(modelNodeInternal);
if (projectionValueDescription.isPresent()) {
return projectionValueDescription;
}
}
return Optional.absent();
}
@Override
public String toString() {
return "ChainingModelProjection{projections=" + projections + '}';
}
}