org.gradle.model.internal.manage.schema.extract.ModelSetNodeInitializerExtractionStrategy Maven / Gradle / Ivy

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/*
 * Copyright 2015 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.manage.schema.extract;

import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSetMultimap;
import com.google.common.collect.Multimap;
import org.gradle.internal.BiAction;
import org.gradle.internal.Cast;
import org.gradle.model.ModelSet;
import org.gradle.model.internal.core.*;
import org.gradle.model.internal.core.rule.describe.ModelRuleDescriptor;
import org.gradle.model.internal.inspect.ManagedChildNodeCreatorStrategy;
import org.gradle.model.internal.manage.schema.CollectionSchema;
import org.gradle.model.internal.type.ModelType;
import org.gradle.model.internal.type.ModelTypes;

public class ModelSetNodeInitializerExtractionStrategy extends CollectionNodeInitializerExtractionSupport {
    private static final ModelType> MODEL_SET_MODEL_TYPE = new ModelType>() {
    };

    @Override
    protected  NodeInitializer extractNodeInitializer(CollectionSchema schema, NodeInitializerContext context) {
        if (MODEL_SET_MODEL_TYPE.isAssignableFrom(schema.getType())) {
            return new ModelSetNodeInitializer(schema);
        }
        return null;
    }

    @Override
    public Iterable> supportedTypes() {
        return ImmutableList.>of(MODEL_SET_MODEL_TYPE);
    }

    private static class ModelSetModelViewFactory implements ModelViewFactory> {
        private final ModelType elementType;

        public ModelSetModelViewFactory(ModelType elementType) {
            this.elementType = elementType;
        }

        @Override
        public ModelView> toView(MutableModelNode modelNode, ModelRuleDescriptor ruleDescriptor, boolean mutable) {
            ModelType> setType = ModelTypes.modelSet(elementType);
            DefaultModelViewState state = new DefaultModelViewState(modelNode.getPath(), setType, ruleDescriptor, mutable, !mutable);
            ChildNodeInitializerStrategy childStrategy = Cast.uncheckedCast(modelNode.getPrivateData(ChildNodeInitializerStrategy.class));
            NodeBackedModelSet set = new NodeBackedModelSet(setType, elementType, ruleDescriptor, modelNode, state, childStrategy);
            return InstanceModelView.of(modelNode.getPath(), setType, set, state.closer());
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) {
                return true;
            }
            if (o == null || getClass() != o.getClass()) {
                return false;
            }

            ModelSetModelViewFactory that = (ModelSetModelViewFactory) o;
            return elementType.equals(that.elementType);

        }

        @Override
        public int hashCode() {
            return elementType.hashCode();
        }
    }

    private static class ModelSetNodeInitializer implements NodeInitializer {
        private final CollectionSchema schema;

        public ModelSetNodeInitializer(CollectionSchema schema) {
            this.schema = schema;
        }

        @Override
        public Multimap getActions(ModelReference subject, ModelRuleDescriptor descriptor) {
            return ImmutableSetMultimap.builder()
                .put(ModelActionRole.Discover, AddProjectionsAction.of(subject, descriptor,
                    TypedModelProjection.of(
                        ModelTypes.modelSet(schema.getElementType()),
                        new ModelSetModelViewFactory(schema.getElementType())
                    )
                ))
                .put(ModelActionRole.Create, DirectNodeInputUsingModelAction.of(subject, descriptor,
                    ModelReference.of(NodeInitializerRegistry.class),
                    new BiAction() {
                        @Override
                        public void execute(MutableModelNode modelNode, NodeInitializerRegistry nodeInitializerRegistry) {
                            ChildNodeInitializerStrategy childStrategy = new ManagedChildNodeCreatorStrategy(nodeInitializerRegistry);
                            modelNode.setPrivateData(ChildNodeInitializerStrategy.class, childStrategy);
                        }
                    }
                ))
                .build();
        }
    }
}