com.vnomicscorp.spring.security.cas.authentication.redis.DefaultCasAuthenticationTokenSerializer.java Source code

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Here is the source code for com.vnomicscorp.spring.security.cas.authentication.redis.DefaultCasAuthenticationTokenSerializer.java

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/**
 * Copyright 2015 Vnomics 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.vnomicscorp.spring.security.cas.authentication.redis;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.charset.Charset;

import org.springframework.security.cas.authentication.CasAuthenticationToken;
import org.springframework.security.crypto.codec.Base64;

/**
 * Default implementation of {@link CasAuthenticationTokenSerializer} that uses
 * Java serialization
 * 
 * @author Samuel Nelson
 *
 */
public class DefaultCasAuthenticationTokenSerializer implements CasAuthenticationTokenSerializer {

    private Charset charset = Charset.forName("UTF-8");

    @Override
    public String serialize(CasAuthenticationToken token) throws CasAuthenticationTokenSerializerException {
        if (token == null) {
            throw new NullPointerException("Expected given token to be non-null");
        }
        try {
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(baos);
            oos.writeObject(token);
            oos.flush();
            return new String(Base64.encode(baos.toByteArray()), charset);
        } catch (IOException e) {
            throw new CasAuthenticationTokenSerializerException(e);
        }
    }

    @Override
    public CasAuthenticationToken deserialize(String serialized) throws CasAuthenticationTokenSerializerException {
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(Base64.decode(serialized.getBytes(charset)));
            ObjectInputStream oos = new ObjectInputStream(bais);
            return (CasAuthenticationToken) oos.readObject();
        } catch (IOException e) {
            throw new CasAuthenticationTokenSerializerException(e);
        } catch (ClassNotFoundException e) {
            throw new CasAuthenticationTokenSerializerException(e);
        }
    }

    /**
     * Gets the charset that will be used to encode and decode strings to bytes
     * and vice versa
     * 
     * @return The charset that will be used to encode and decode strings to
     *         bytes and vice versa
     */
    public Charset getCharset() {
        return charset;
    }

    /**
     * Sets the charset that will be used to encode and decode strings to bytes
     * and vice versa
     * 
     * @param charset
     *            The charset that will be used to encode and decode strings to
     *            bytes and vice versa
     */
    public void setCharset(Charset charset) {
        this.charset = charset;
    }
}