plugins/ant/src/com/intellij/lang/ant/config/impl/ClassLoaderHolder.java

/*
 * Copyright 2000-2009 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.lang.ant.config.impl;

import com.intellij.util.config.AbstractProperty;
import org.jetbrains.annotations.NotNull;

/**
 * @author Eugene Zhuravlev
 *         Date: Mar 26, 2007
 */
public abstract class ClassLoaderHolder {
  protected final AbstractProperty.AbstractPropertyContainer myOptions;
  private ClassLoader myLoader;

  public ClassLoaderHolder(AbstractProperty.AbstractPropertyContainer options) {
    myOptions = options;
  }

  @NotNull
  public ClassLoader getClassloader() {
    if (myLoader == null) {
      myLoader = buildClasspath();
    }
    return myLoader;
  }

  public void updateClasspath() {
    myLoader = null;
  }
    
  protected abstract ClassLoader buildClasspath();
}