com.shigengyu.hyperion.core.WorkflowContextBinarySerializer.java Source code

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Here is the source code for com.shigengyu.hyperion.core.WorkflowContextBinarySerializer.java

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/*******************************************************************************
 * Copyright 2013-2014 Gengyu Shi
 *
 * 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.shigengyu.hyperion.core;

import org.apache.commons.codec.binary.Base64;
import org.apache.commons.lang.SerializationUtils;

public class WorkflowContextBinarySerializer implements WorkflowContextSerializer {

    @Override
    public <T extends WorkflowContext> T deserialize(final Class<T> clazz, String input) {
        Object workflowContext = null;
        try {
            workflowContext = SerializationUtils.deserialize(Base64.decodeBase64(input));
            if (workflowContext == null) {
                return null;
            }
            return clazz.cast(workflowContext);
        } catch (ClassCastException e) {
            if (workflowContext != null) {
                throw new WorkflowContextException("Unable to cast workflow context of type ["
                        + workflowContext.getClass().getName() + "] to [" + clazz.getName() + "]");
            } else {
                throw new WorkflowContextException(e);
            }
        }
    }

    @Override
    public WorkflowContextSerializer getCloned() {
        return new WorkflowContextBinarySerializer();
    }

    @Override
    public String serialize(WorkflowContext workflowContext) {
        return Base64.encodeBase64String(SerializationUtils.serialize(workflowContext));
    }
}