1 /*
2 * Copyright 1999-2004 The Apache Software Foundation.
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 package org.apache.struts.flow.sugar;
17
18 import org.mozilla.javascript.*;
19
20 import java.io.*;
21 import java.util.*;
22
23 /***
24 * Adds various functions to java.io.InputStream
25 * @targetClass java.io.InputStream
26 */
27 public class InputStreamExtensions {
28
29
30 /***
31 * Gets the contents of the stream as a String.
32 *
33 * @funcParams
34 * @funcReturn String
35 * @example text = inStream.getText()
36 */
37 public static ExtensionFunction getText(final InputStream in) {
38 return new ExtensionFunction() {
39 public Object execute(Context cx, Scriptable scope, Scriptable thisObj, java.lang.Object[] args)
40 throws IOException {
41
42 BufferedReader reader = new BufferedReader(new InputStreamReader(in));
43 StringBuffer answer = new StringBuffer();
44 // reading the content of the file within a char buffer allow to keep the correct line endings
45 char[] charBuffer = new char[4096];
46 int nbCharRead = 0;
47 while ((nbCharRead = reader.read(charBuffer)) != -1) {
48 // appends buffer
49 answer.append(charBuffer, 0, nbCharRead);
50 }
51 reader.close();
52 return answer.toString();
53 }
54 };
55 }
56 }