/*
* Copyright 2012 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 com.google.common.base.Objects;
import groovy.lang.Closure;
import org.gradle.api.Action;
import org.gradle.api.InvalidActionClosureException;
import org.gradle.util.Configurable;
public class ClosureBackedAction<T> implements Action<T> {
private final Closure closure;
private final boolean configureableAware;
private final int resolveStrategy;
public static <T> ClosureBackedAction<T> of(Closure<?> closure) {
return new ClosureBackedAction<T>(closure);
}
public ClosureBackedAction(Closure closure) {
this(closure, Closure.DELEGATE_FIRST, true);
}
public ClosureBackedAction(Closure closure, int resolveStrategy) {
this(closure, resolveStrategy, false);
}
public ClosureBackedAction(Closure closure, int resolveStrategy, boolean configureableAware) {
this.closure = closure;
this.configureableAware = configureableAware;
this.resolveStrategy = resolveStrategy;
}
public static <T> void execute(T delegate, Closure<?> closure) {
new ClosureBackedAction<T>(closure).execute(delegate);
}
public void execute(T delegate) {
if (closure == null) {
return;
}
try {
if (configureableAware && delegate instanceof Configurable) {
((Configurable) delegate).configure(closure);
} else {
Closure copy = (Closure) closure.clone();
copy.setResolveStrategy(resolveStrategy);
copy.setDelegate(delegate);
if (copy.getMaximumNumberOfParameters() == 0) {
copy.call();
} else {
copy.call(delegate);
}
}
} catch (groovy.lang.MissingMethodException e) {
if (Objects.equal(e.getType(), closure.getClass()) && Objects.equal(e.getMethod(), "doCall")) {
throw new InvalidActionClosureException(closure, delegate);
}
throw e;
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
ClosureBackedAction that = (ClosureBackedAction) o;
if (configureableAware != that.configureableAware) {
return false;
}
if (resolveStrategy != that.resolveStrategy) {
return false;
}
if (!closure.equals(that.closure)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = closure.hashCode();
result = 31 * result + (configureableAware ? 1 : 0);
result = 31 * result + resolveStrategy;
return result;
}
}