/*
* Copyright 2011 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.tasks.execution;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.internal.TaskInternal;
import org.gradle.api.internal.tasks.TaskExecuter;
import org.gradle.api.internal.tasks.TaskExecutionContext;
import org.gradle.api.internal.tasks.TaskStateInternal;
import org.gradle.api.tasks.TaskValidationException;
import java.util.ArrayList;
import java.util.List;
/**
* A {@link TaskExecuter} which performs validation before executing the task.
*/
public class ValidatingTaskExecuter implements TaskExecuter {
private final TaskExecuter executer;
public ValidatingTaskExecuter(TaskExecuter executer) {
this.executer = executer;
}
public void execute(TaskInternal task, TaskStateInternal state, TaskExecutionContext context) {
List<String> messages = new ArrayList<String>();
for (TaskValidator validator : task.getValidators()) {
validator.validate(task, messages);
}
if (!messages.isEmpty()) {
List<InvalidUserDataException> causes = new ArrayList<InvalidUserDataException>();
messages = messages.subList(0, Math.min(5, messages.size()));
for (String message : messages) {
causes.add(new InvalidUserDataException(message));
}
String errorMessage;
if (messages.size() == 1) {
errorMessage = String.format("A problem was found with the configuration of %s.", task);
} else {
errorMessage = String.format("Some problems were found with the configuration of %s.", task);
}
state.executed(new TaskValidationException(errorMessage, causes));
return;
}
executer.execute(task, state, context);
}
}