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1   /*
2    * Copyright 2014 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  
17  package org.openehealth.ipf.platform.camel.hl7;
18  
19  import ca.uhn.hl7v2.HL7Exception;
20  import ca.uhn.hl7v2.model.Message;
21  import ca.uhn.hl7v2.util.Terser;
22  import org.apache.camel.Exchange;
23  import org.apache.camel.Expression;
24  import org.openehealth.ipf.modules.hl7.HL7v2Exception;
25  
26  /**
27   *
28   */
29  public class TerserSetExpression implements Expression {
30  
31      private final String spec;
32      private final Expression value;
33  
34      public TerserSetExpression(String spec, Expression value) {
35          super();
36          this.spec = spec;
37          this.value = value;
38      }
39  
40      @Override
41      public <T> T evaluate(Exchange exchange, Class<T> type) {
42          try {
43              Message msg = HL7v2.bodyMessage(exchange);
44              new Terser(msg).set(spec, value.evaluate(exchange, String.class));
45              return (T)msg;
46          } catch (HL7Exception e) {
47              throw new HL7v2Exception(e);
48          }
49      }
50  
51  
52      public String getDescription() {
53          // Terser Expression is equivalent with Location
54          return "";
55      }
56  
57  }