/*
* 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.Optional;
import net.jcip.annotations.ThreadSafe;
import org.gradle.internal.Cast;
import org.gradle.model.internal.core.rule.describe.ModelRuleDescriptor;
import org.gradle.model.internal.type.ModelType;
import static org.gradle.internal.reflect.JavaReflectionUtil.hasDefaultToString;
import static org.gradle.model.internal.manage.schema.extract.PrimitiveTypes.defaultValueOf;
import static org.gradle.model.internal.manage.schema.extract.PrimitiveTypes.isPrimitiveType;
import static org.gradle.model.internal.manage.schema.extract.ScalarTypes.isScalarType;
@ThreadSafe
public class UnmanagedModelProjection<M> extends TypeCompatibilityModelProjectionSupport<M> {
public static <M> ModelProjection of(ModelType<M> type) {
return new UnmanagedModelProjection<M>(type);
}
public static <M> ModelProjection of(Class<M> type) {
return of(ModelType.of(type));
}
public UnmanagedModelProjection(ModelType<M> type) {
super(type);
}
@Override
protected ModelView<M> toView(MutableModelNode modelNode, ModelRuleDescriptor ruleDescriptor, boolean writable) {
M instance = Cast.uncheckedCast(modelNode.getPrivateData());
return InstanceModelView.of(modelNode.getPath(), getType(), instance);
}
@Override
public Optional<String> getValueDescription(MutableModelNode modelNode) {
Object instance = this.asImmutable(ModelType.untyped(), modelNode, null).getInstance();
if (instance == null) {
if (isPrimitiveType(getType())) {
if (getType().equals(ModelType.of(char.class))) {
return Optional.of("");
} else {
return Optional.of(String.valueOf(defaultValueOf(getType())));
}
}
if (isScalarType(getType())) {
return Optional.of("null");
}
return Optional.absent();
}
if (hasDefaultToString(instance)) {
return Optional.absent();
}
return Optional.of(toStringValueDescription(instance));
}
}