/*
* Copyright 2010 LinkedIn, 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 azkaban.serialization.de;
import azkaban.common.utils.Props;
import azkaban.flow.FlowExecutionHolder;
import azkaban.serialization.Verifier;
import com.google.common.base.Function;
import java.util.Map;
/**
* Deserializes a "flow execution" object. I.e., one of the JSONObjects
* in the json files in the execution history directory.
*
*/
public class FlowExecutionDeserializer implements Function<Map<String, Object>, FlowExecutionHolder>
{
private final ExecutableFlowDeserializer flowDeserializer;
public FlowExecutionDeserializer(
ExecutableFlowDeserializer flowDeserializer
)
{
this.flowDeserializer = flowDeserializer;
}
@Override
public FlowExecutionHolder apply(Map<String, Object> descriptor) {
final FlowExecutionHolder retVal;
// Maintain backwards compatibility, check if it's really a holder
final Object type = descriptor.get("type");
if (type != null && "FlowExecutionHolder".equals(type.toString())) {
retVal = new FlowExecutionHolder(
flowDeserializer.apply(Verifier.getVerifiedObject(descriptor, "flow", Map.class)),
new Props(new Props(), Verifier.getVerifiedObject(descriptor, "parentProps", Map.class))
);
}
else {
retVal = new FlowExecutionHolder(
flowDeserializer.apply(descriptor),
new Props()
);
}
return retVal;
}
}