/*
* 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.ImmutableSet;
import org.gradle.api.specs.Spec;
import org.gradle.internal.Cast;
import org.gradle.model.internal.core.NodeInitializer;
import org.gradle.model.internal.core.NodeInitializerContext;
import org.gradle.model.internal.inspect.FactoryBasedStructNodeInitializer;
import org.gradle.model.internal.manage.binding.StructBindings;
import org.gradle.model.internal.manage.binding.StructBindingsStore;
import org.gradle.model.internal.manage.schema.ManagedImplSchema;
import org.gradle.model.internal.manage.schema.ModelSchema;
import org.gradle.model.internal.manage.schema.StructSchema;
import org.gradle.model.internal.type.ModelType;
import org.gradle.model.internal.typeregistration.InstanceFactory;
import java.util.Set;
public class FactoryBasedStructNodeInitializerExtractionStrategy<T> implements NodeInitializerExtractionStrategy {
private final InstanceFactory<T> instanceFactory;
private final StructBindingsStore bindingsStore;
public FactoryBasedStructNodeInitializerExtractionStrategy(InstanceFactory<T> instanceFactory, StructBindingsStore bindingsStore) {
this.instanceFactory = instanceFactory;
this.bindingsStore = bindingsStore;
}
@Override
public <S> NodeInitializer extractNodeInitializer(ModelSchema<S> schema, NodeInitializerContext<S> context) {
if (!instanceFactory.getBaseInterface().isAssignableFrom(schema.getType())) {
return null;
}
NodeInitializer nodeInitializer = getNodeInitializer(Cast.<ModelSchema<? extends T>>uncheckedCast(schema));
if (nodeInitializer == null) {
throw new IllegalArgumentException(String.format("Cannot create an instance of type '%s' as this type is not known. Known types: %s.", schema.getType(), formatKnownTypes(context.getConstraints(), instanceFactory.getSupportedTypes())));
}
return nodeInitializer;
}
private String formatKnownTypes(Spec<ModelType<?>> constraints, Set<? extends ModelType<?>> supportedTypes) {
StringBuilder builder = new StringBuilder();
for (ModelType<?> supportedType : supportedTypes) {
if (constraints.isSatisfiedBy(supportedType)) {
if (builder.length() > 0) {
builder.append(", ");
}
builder.append(supportedType);
}
}
if (builder.length() == 0) {
return "(none)";
}
return builder.toString();
}
private <S extends T> NodeInitializer getNodeInitializer(final ModelSchema<S> schema) {
StructSchema<S> publicSchema = Cast.uncheckedCast(schema);
InstanceFactory.ImplementationInfo implementationInfo = getImplementationInfo(publicSchema);
if (implementationInfo == null) {
return null;
}
Set<ModelType<?>> internalViews = implementationInfo.getInternalViews();
ModelType<?> delegateType = implementationInfo.getDelegateType();
StructBindings<S> bindings = bindingsStore.getBindings(publicSchema.getType(), internalViews, delegateType);
return new FactoryBasedStructNodeInitializer<T, S>(bindings, implementationInfo);
}
private <S extends T> InstanceFactory.ImplementationInfo getImplementationInfo(StructSchema<S> schema) {
ModelType<S> publicType = schema.getType();
return schema instanceof ManagedImplSchema
? instanceFactory.getManagedSubtypeImplementationInfo(publicType)
: instanceFactory.getImplementationInfo(publicType);
}
@Override
public Iterable<ModelType<?>> supportedTypes() {
return ImmutableSet.<ModelType<?>>copyOf(instanceFactory.getSupportedTypes());
}
}