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1   package ca.uhn.fhir.fluentpath;
2   
3   /*
4    * #%L
5    * HAPI FHIR - Core Library
6    * %%
7    * Copyright (C) 2014 - 2019 University Health Network
8    * %%
9    * Licensed under the Apache License, Version 2.0 (the "License");
10   * you may not use this file except in compliance with the License.
11   * You may obtain a copy of the License at
12   * 
13   *      http://www.apache.org/licenses/LICENSE-2.0
14   * 
15   * Unless required by applicable law or agreed to in writing, software
16   * distributed under the License is distributed on an "AS IS" BASIS,
17   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
18   * See the License for the specific language governing permissions and
19   * limitations under the License.
20   * #L%
21   */
22  
23  import java.util.List;
24  import java.util.Optional;
25  
26  import org.hl7.fhir.instance.model.api.IBase;
27  
28  public interface IFluentPath {
29  
30  	/**
31  	 * Apply the given FluentPath expression against the given input and return
32  	 * all results in a list
33  	 * 
34  	 * @param theInput The input object (generally a resource or datatype)
35  	 * @param thePath The fluent path expression
36  	 * @param theReturnType The type to return (in order to avoid casting)
37  	 */
38  	<T extends IBase> List<T> evaluate(IBase theInput, String thePath, Class<T> theReturnType);
39  
40  	/**
41  	 * Apply the given FluentPath expression against the given input and return
42  	 * the first match (if any)
43  	 *
44  	 * @param theInput The input object (generally a resource or datatype)
45  	 * @param thePath The fluent path expression
46  	 * @param theReturnType The type to return (in order to avoid casting)
47  	 */
48  	<T extends IBase> Optional<T> evaluateFirst(IBase theInput, String thePath, Class<T> theReturnType);
49  
50  	
51  }