/**
* Copyright (C) 2006 Google Inc.
*
* 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.opensymphony.xwork2.inject;
/**
* Dependency mapping key. Uniquely identified by the required type and name.
*
* @author crazybob@google.com (Bob Lee)
*/
class Key<T> {
final Class<T> type;
final String name;
final int hashCode;
private Key(Class<T> type, String name) {
if (type == null) {
throw new NullPointerException("Type is null.");
}
if (name == null) {
throw new NullPointerException("Name is null.");
}
this.type = type;
this.name = name;
hashCode = type.hashCode() * 31 + name.hashCode();
}
Class<T> getType() {
return type;
}
String getName() {
return name;
}
@Override
public int hashCode() {
return hashCode;
}
@Override
public boolean equals(Object o) {
if (!(o instanceof Key)) {
return false;
}
if (o == this) {
return true;
}
Key other = (Key) o;
return name.equals(other.name) && type.equals(other.type);
}
@Override
public String toString() {
return "[type=" + type.getName() + ", name='" + name + "']";
}
static <T> Key<T> newInstance(Class<T> type, String name) {
return new Key<T>(type, name);
}
}