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
17package com.google.clearsilver.jsilver.functions.string;
18
19import com.google.clearsilver.jsilver.functions.NonEscapingFunction;
20import com.google.clearsilver.jsilver.values.Value;
21import 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 */
27public 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   */
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