java/compiler/impl/src/com/intellij/compiler/CompileTaskBean.java

/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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 com.intellij.compiler;

import com.intellij.openapi.compiler.CompileTask;
import com.intellij.openapi.extensions.AbstractExtensionPointBean;
import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.AtomicNotNullLazyValue;
import com.intellij.util.xmlb.annotations.Attribute;
import org.jetbrains.annotations.NotNull;

/**
 * @author nik
 */
public class CompileTaskBean extends AbstractExtensionPointBean {
  public static final ExtensionPointName<CompileTaskBean> EP_NAME = ExtensionPointName.create("com.intellij.compiler.task");
  public enum CompileTaskExecutionPhase { BEFORE, AFTER }
  
  private final Project myProject;

  public CompileTaskBean(Project project) {
    myProject = project;
  }

  @Attribute("execute")
  public CompileTaskExecutionPhase myExecutionPhase = CompileTaskExecutionPhase.BEFORE;
  
  @Attribute("implementation")
  public String myImplementation;
  
  private final AtomicNotNullLazyValue<CompileTask> myInstanceHolder = new AtomicNotNullLazyValue<CompileTask>() {
    @NotNull
    @Override
    protected CompileTask compute() {
      try {
        return instantiate(myImplementation, myProject.getPicoContainer());
      }
      catch (ClassNotFoundException e) {
        throw new RuntimeException(e);
      }
    }
  };

  public CompileTask getTaskInstance() {
    return myInstanceHolder.getValue();
  }
}