/*
* 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.inspect;
import com.google.common.collect.ImmutableList;
import net.jcip.annotations.ThreadSafe;
import org.gradle.api.specs.Spec;
import org.gradle.model.Path;
import org.gradle.model.internal.core.ModelPath;
import org.gradle.model.internal.core.ModelReference;
import org.gradle.model.internal.core.ModelType;
import org.gradle.model.internal.core.rule.describe.MethodModelRuleDescriptor;
import org.gradle.model.internal.core.rule.describe.ModelRuleDescriptor;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.util.List;
import static org.gradle.util.CollectionUtils.findFirst;
@ThreadSafe
public class DefaultMethodRuleDefinition<T, R> implements MethodRuleDefinition<R> {
private final Method method;
private final ModelType<T> instanceType;
private final ModelType<R> returnType;
private DefaultMethodRuleDefinition(Method method, ModelType<T> instanceType, ModelType<R> returnType) {
this.method = method;
this.instanceType = instanceType;
this.returnType = returnType;
}
public static <T, R> MethodRuleDefinition<R> create(Class<T> source, Method method) {
@SuppressWarnings("unchecked") ModelType<R> returnType = (ModelType<R>) ModelType.of(method.getGenericReturnType());
return new DefaultMethodRuleDefinition<T, R>(method, ModelType.of(source), returnType);
}
public String getMethodName() {
return method.getName();
}
public ModelType<R> getReturnType() {
return returnType;
}
public <A extends Annotation> A getAnnotation(Class<A> annotationType) {
return method.getAnnotation(annotationType);
}
public ModelRuleDescriptor getDescriptor() {
return new MethodModelRuleDescriptor(method);
}
public ModelRuleInvoker<R> getRuleInvoker() {
return new DefaultModelRuleInvoker<T, R>(method, instanceType, returnType);
}
public List<ModelReference<?>> getReferences() {
Type[] types = method.getGenericParameterTypes();
ImmutableList.Builder<ModelReference<?>> inputBindingBuilder = ImmutableList.builder();
for (int i = 0; i < types.length; i++) {
Type paramType = types[i];
Annotation[] paramAnnotations = method.getParameterAnnotations()[i];
inputBindingBuilder.add(reference(paramType, paramAnnotations, i));
}
return inputBindingBuilder.build();
}
private ModelReference<?> reference(Type type, Annotation[] annotations, int i) {
Path pathAnnotation = (Path) findFirst(annotations, new Spec<Annotation>() {
public boolean isSatisfiedBy(Annotation element) {
return element.annotationType().equals(Path.class);
}
});
String path = pathAnnotation == null ? null : pathAnnotation.value();
ModelType<?> cast = ModelType.of(type);
return ModelReference.of(path == null ? null : ModelPath.path(path), cast, String.format("parameter %s", i + 1));
}
}