1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache License, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17
18 package org.apache.commons.pipeline.stage;
19
20 import java.io.BufferedReader;
21 import java.io.IOException;
22 import java.io.InputStream;
23 import java.io.InputStreamReader;
24 import org.apache.commons.pipeline.stage.BaseStage;
25 import org.apache.commons.pipeline.StageException;
26
27 /**
28 * Breaks up an InputStream by line and exqueues each resulting line.
29 */
30 public class InputStreamLineBreakStage extends BaseStage {
31 /**
32 * Holds value of property ignoringBlankLines.
33 */
34 private boolean ignoringBlankLines = false;
35
36 /** Creates a new instance of InputStreamLineBreakStage */
37 public InputStreamLineBreakStage() {
38 super();
39 }
40
41 /** Creates a new instance of InputStreamLineBreakStage */
42 public InputStreamLineBreakStage(boolean ignoringBlankLines) {
43 this.ignoringBlankLines = ignoringBlankLines;
44 }
45
46 public void process(Object obj) throws org.apache.commons.pipeline.StageException {
47 InputStream is = (InputStream) obj;
48 try {
49 InputStreamReader reader = new InputStreamReader(is);
50 BufferedReader buffered = new BufferedReader(reader);
51 String line = buffered.readLine();
52 while (line != null){
53 if (!(ignoringBlankLines && line.trim().equals(""))) {
54 this.emit(line);
55 }
56 line = buffered.readLine();
57 }
58 } catch (IOException e){
59 throw new StageException(this, e);
60 }
61 }
62
63 /**
64 * Getter for property ignoreBlankLines.
65 * @return Value of property ignoreBlankLines.
66 */
67 public boolean isIgnoringBlankLines() {
68 return this.ignoringBlankLines;
69 }
70
71 /**
72 * Specifies that this stage will not exqueue blank lines.
73 * @param ignoreBlankLines New value of property ignoreBlankLines.
74 */
75 public void setIgnoringBlankLines(boolean ignoringBlankLines) {
76 this.ignoringBlankLines = ignoringBlankLines;
77 }
78 }