/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ambari.view.hive20.internal;
import com.google.common.base.Supplier;
/**
* Create instances of classes
* for which no constructors have been specified
* @param <T>
*/
public class DefaultSupplier<T> implements Supplier<T>{
private Class<T> clazz;
T instance;
public DefaultSupplier(T instance) {
this.instance = instance;
}
public DefaultSupplier(Class<T> clazz) throws IllegalAccessException, InstantiationException {
this.clazz = clazz;
}
/**
* Get the instance
* @return
*/
@Override
public T get() {
if(clazz != null){
try {
return clazz.newInstance();
} catch (InstantiationException e) {
e.printStackTrace();
return null;
} catch (IllegalAccessException e) {
return null;
}
} else {
return instance;
}
}
}