com.wedeploy.api.security.HashEngine Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of Liferay, Inc. nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.wedeploy.api.security;
import java.util.HashMap;
import java.util.Map;
/**
* Main class that performs bindings and holds instances of hash generators.
*/
public class HashEngine {
/**
* Returns singleton instance of the engine.
*/
public static HashEngine instance() {
return instance;
}
public static void setFactory(HashGeneratorFactory factory) {
HashEngine.factory = factory;
}
/**
* Returns te {@link HashGenerator} instance.
*/
public HashGenerator lookup(String algorithm) {
HashGenerator generator = generators.get(algorithm);
if (generator != null) {
return generator;
}
if (factory == null) {
throw new HashEngineException("No hash generator factory set.");
}
generator = factory.create(algorithm);
generators.put(algorithm, generator);
return generator;
}
/**
* Manual registration of engines.
*/
public HashEngine register(String algorithm, HashGenerator generator) {
generators.put(algorithm, generator);
return this;
}
protected HashEngine() {
}
protected void clearEngine() {
factory = null;
generators.clear();
}
private static HashGeneratorFactory factory;
private static final HashEngine instance = new HashEngine();
private Map generators = new HashMap<>();
}