Package com.alu.e3.gateway.common.camel.processor

Source Code of com.alu.e3.gateway.common.camel.processor.PropertyExtractionProcessor

/**
* Copyright © 2012 Alcatel-Lucent.
*
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership.
* Licensed to you 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.alu.e3.gateway.common.camel.processor;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import org.apache.camel.Exchange;
import org.apache.camel.Processor;

import com.alu.e3.common.camel.AuthIdentity;
import com.alu.e3.common.camel.ExchangeConstantKeys;
import com.alu.e3.data.model.CallDescriptor;
import com.alu.e3.data.model.Policy;

/**
* This processor is meant to go through all of the applicable model to extract
* the properties for use by Header Transformations, TDRs, etc.
*
*/
public class PropertyExtractionProcessor implements Processor {

  @Override
  public void process(Exchange exchange) throws Exception {
    AuthIdentity identity = (AuthIdentity) exchange.getProperty(ExchangeConstantKeys.E3_AUTH_IDENTITY.toString());
    Map<String, String> props = resolveProperties(identity);

    exchange.setProperty(ExchangeConstantKeys.E3_MODEL_PROPERTIES.toString(), props);
  }

  /**
   * Inner function to help do the work of merging all of the property maps
   * By design we have decided that properties that have naming conflicts will be resolved by the following rules
   *
   * auth > policy > api
   * conflicts between policies will be resolved in an undefined way.
   *
   * @param identity
   * @return
   */
  private Map<String, String> resolveProperties(AuthIdentity identity){
    Map<String, String> props = new HashMap<String,String>();

    props.putAll(identity.getApi().getProperties());
    Iterator<CallDescriptor> it = identity.getCallDescriptors().iterator();
    while(it.hasNext()){
      CallDescriptor cd = it.next();
      Policy policy = cd.getPolicy();
      if(policy != null){
        props.putAll(policy.getProperties());
      }
    }

    if(identity.getAuth() != null)
      props.putAll(identity.getAuth().getProperties());


    return props;
  }

}
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