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AbstractPolymorphicDomainObjectContainer.java
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AbstractPolymorphicDomainObjectContainer.java
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/*
* Copyright 2010 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.api.internal;
import groovy.lang.Closure;
import org.gradle.api.Action;
import org.gradle.api.NamedDomainObjectProvider;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.NamedDomainObjectContainer;
import org.gradle.api.Namer;
import org.gradle.internal.Cast;
import org.gradle.internal.Transformers;
import org.gradle.internal.metaobject.AbstractDynamicObject;
import org.gradle.internal.metaobject.ConfigureDelegate;
import org.gradle.internal.metaobject.DynamicInvokeResult;
import org.gradle.internal.metaobject.DynamicObject;
import org.gradle.internal.reflect.Instantiator;
import org.gradle.util.ConfigureUtil;
import javax.annotation.Nullable;
import java.util.Map;
public abstract class AbstractPolymorphicDomainObjectContainer<T>
extends AbstractNamedDomainObjectContainer<T> implements PolymorphicDomainObjectContainerInternal<T> {
private final ContainerElementsDynamicObject elementsDynamicObject = new ContainerElementsDynamicObject();
protected AbstractPolymorphicDomainObjectContainer(Class<T> type, Instantiator instantiator, Namer<? super T> namer, CollectionCallbackActionDecorator callbackDecorator) {
super(type, instantiator, namer, callbackDecorator);
}
protected abstract <U extends T> U doCreate(String name, Class<U> type);
@Override
public <U extends T> U create(String name, Class<U> type) {
assertMutable("create(String, Class)");
return create(name, type, null);
}
@Override
public <U extends T> U maybeCreate(String name, Class<U> type) throws InvalidUserDataException {
T item = findByName(name);
if (item != null) {
return Transformers.cast(type).transform(item);
}
return create(name, type);
}
@Override
public <U extends T> U create(String name, Class<U> type, Action<? super U> configuration) {
assertMutable("create(String, Class, Action)");
assertCanAdd(name);
U object = doCreate(name, type);
add(object);
if (configuration != null) {
configuration.execute(object);
}
return object;
}
@Override
public <U extends T> NamedDomainObjectProvider<U> register(String name, Class<U> type) throws InvalidUserDataException {
assertMutable("register(String, Class)");
return createDomainObjectProvider(name, type, null);
}
@Override
public <U extends T> NamedDomainObjectProvider<U> register(String name, Class<U> type, Action<? super U> configurationAction) throws InvalidUserDataException {
assertMutable("register(String, Class, Action)");
return createDomainObjectProvider(name, type, configurationAction);
}
protected <U extends T> NamedDomainObjectProvider<U> createDomainObjectProvider(String name, Class<U> type, @Nullable Action<? super U> configurationAction) {
assertCanAdd(name);
NamedDomainObjectProvider<U> provider = Cast.uncheckedCast(
getInstantiator().newInstance(NamedDomainObjectCreatingProvider.class, AbstractPolymorphicDomainObjectContainer.this, name, type, configurationAction)
);
addLater(provider);
return provider;
}
// Cannot be private due to reflective instantiation
public class NamedDomainObjectCreatingProvider<I extends T> extends AbstractDomainObjectCreatingProvider<I> {
public NamedDomainObjectCreatingProvider(String name, Class<I> type, @Nullable Action<? super I> configureAction) {
super(name, type, configureAction);
}
@Override
protected I createDomainObject() {
return doCreate(getName(), getType());
}
}
@Override
protected DynamicObject getElementsAsDynamicObject() {
return elementsDynamicObject;
}
@Override
protected ConfigureDelegate createConfigureDelegate(Closure configureClosure) {
return new PolymorphicDomainObjectContainerConfigureDelegate(configureClosure, this);
}
private class ContainerElementsDynamicObject extends AbstractDynamicObject {
@Override
public String getDisplayName() {
return AbstractPolymorphicDomainObjectContainer.this.getDisplayName();
}
@Override
public boolean hasProperty(String name) {
return findByName(name) != null;
}
@Override
public DynamicInvokeResult tryGetProperty(String name) {
Object object = findByName(name);
return object == null ? DynamicInvokeResult.notFound() : DynamicInvokeResult.found(object);
}
@Override
public Map<String, T> getProperties() {
return getAsMap();
}
@Override
public boolean hasMethod(String name, Object... arguments) {
return isConfigureMethod(name, arguments);
}
@Override
public DynamicInvokeResult tryInvokeMethod(String name, Object... arguments) {
if (isConfigureMethod(name, arguments)) {
T element = getByName(name);
Object lastArgument = arguments[arguments.length - 1];
if (lastArgument instanceof Closure) {
ConfigureUtil.configure((Closure) lastArgument, element);
}
return DynamicInvokeResult.found(element);
}
return DynamicInvokeResult.notFound();
}
private boolean isConfigureMethod(String name, Object... arguments) {
return (arguments.length == 1 && arguments[0] instanceof Closure
|| arguments.length == 1 && arguments[0] instanceof Class
|| arguments.length == 2 && arguments[0] instanceof Class && arguments[1] instanceof Closure)
&& hasProperty(name);
}
}
@Override
public <U extends T> NamedDomainObjectContainer<U> containerWithType(Class<U> type) {
return getInstantiator().newInstance(TypedDomainObjectContainerWrapper.class, type, this);
}
}