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/*
* 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.util;
import com.intellij.diagnostic.PluginException;
import com.intellij.openapi.extensions.AbstractExtensionPointBean;
import com.intellij.openapi.util.LazyInstance;
import com.intellij.openapi.util.NotNullLazyValue;
import com.intellij.util.xmlb.annotations.Attribute;
import org.jetbrains.annotations.NotNull;
/**
* @author yole
*/
public class MixinEP<T> extends AbstractExtensionPointBean {
// these must be public for scrambling compatibility
@Attribute("key")
public String key;
@Attribute("implementationClass")
public String implementationClass;
private final NotNullLazyValue<Class> myKey = new NotNullLazyValue<Class>() {
@NotNull
protected Class compute() {
if (key == null) {
String error = "No key specified for mixin with implementation class " + implementationClass;
if (myPluginDescriptor != null) {
throw new PluginException(error, myPluginDescriptor.getPluginId());
}
throw new IllegalArgumentException(error);
}
try {
return findClass(key);
}
catch (ClassNotFoundException e) {
throw new RuntimeException(e);
}
}
};
private final LazyInstance<T> myHandler = new LazyInstance<T>() {
protected Class<T> getInstanceClass() throws ClassNotFoundException {
return findClass(implementationClass);
}
};
public Class getKey() {
return myKey.getValue();
}
public T getInstance() {
return myHandler.getValue();
}
}
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