1 /*
2  * Copyright (C) 2010 Google Inc.
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 com.google.clearsilver.jsilver.functions.string;
18 
19 import com.google.clearsilver.jsilver.functions.NonEscapingFunction;
20 import com.google.clearsilver.jsilver.values.Value;
21 import static com.google.clearsilver.jsilver.values.Value.literalConstant;
22 
23 /**
24  * Returns the numeric position of the substring in the string (if found), otherwise returns -1
25  * similar to the Python string.find method.
26  */
27 public class FindFunction extends NonEscapingFunction {
28 
29   /**
30    * @param args 2 string expressions (full string and substring)
31    * @return Position of the start of substring (or -1 if not found) as number value
32    */
execute(Value... args)33   public Value execute(Value... args) {
34     Value fullStringValue = args[0];
35     Value subStringValue = args[1];
36     return literalConstant(fullStringValue.asString().indexOf(subStringValue.asString()),
37         fullStringValue, subStringValue);
38   }
39 }
40