/*
* Copyright 2014 NAVER Corp.
*
* 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.navercorp.pinpoint.profiler.objectfactory;
// TODO move package
public abstract class Option {
public abstract Object getValue();
public abstract boolean hasValue();
public static Option withValue(Object value) {
return new WithValue(value);
}
@SuppressWarnings("unchecked")
public static Option empty() {
return (Option)EMPTY;
}
private static final class WithValue extends Option {
private final Object value;
private WithValue(Object value) {
this.value = value;
}
@Override
public Object getValue() {
return value;
}
@Override
public boolean hasValue() {
return true;
}
}
private static final Option EMPTY = new Option() {
@Override
public Object getValue() {
return null;
}
@Override
public boolean hasValue() {
return false;
}
};
}