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/* |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 2003 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if |
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* any, must include the following acknowlegement: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowlegement may appear in the software itself, |
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* if and wherever such third-party acknowlegements normally appear. |
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* |
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* 4. The names "Ant" and "Apache Software |
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* Foundation" must not be used to endorse or promote products derived |
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* from this software without prior written permission. For written |
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* permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache" |
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* nor may "Apache" appear in their names without prior written |
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* permission of the Apache Group. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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package org.apache.tools.ant.util; |
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import java.io.Reader; |
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import java.io.IOException; |
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import org.apache.tools.ant.ProjectComponent; |
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/** |
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* class to tokenize the input as lines seperated |
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* by \r (mac style), \r\n (dos/windows style) or \n (unix style) |
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* @author Peter Reilly |
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* @since Ant 1.6 |
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*/ |
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public class LineTokenizer extends ProjectComponent |
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implements Tokenizer { |
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private String lineEnd = ""; |
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private int pushed = -2; |
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private boolean includeDelims = false; |
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/** |
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* attribute includedelims - whether to include |
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* the line ending with the line, or to return |
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* it in the posttoken |
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* default false |
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* @param includeDelims if true include /r and /n in the line |
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*/ |
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public void setIncludeDelims(boolean includeDelims) { |
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this.includeDelims = includeDelims; |
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} |
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/** |
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* get the next line from the input |
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* |
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* @param in the input reader |
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* @return the line excluding /r or /n, unless includedelims is set |
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* @exception IOException if an error occurs reading |
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*/ |
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public String getToken(Reader in) throws IOException { |
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int ch = -1; |
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if (pushed != -2) { |
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ch = pushed; |
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pushed = -2; |
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} else { |
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ch = in.read(); |
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} |
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if (ch == -1) { |
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return null; |
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} |
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lineEnd = ""; |
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StringBuffer line = new StringBuffer(); |
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int state = 0; |
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while (ch != -1) { |
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if (state == 0) { |
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if (ch == '\r') { |
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state = 1; |
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} else if (ch == '\n') { |
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lineEnd = "\n"; |
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break; |
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} else { |
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line.append((char) ch); |
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} |
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} else { |
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state = 0; |
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if (ch == '\n') { |
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lineEnd = "\r\n"; |
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} else { |
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pushed = ch; |
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lineEnd = "\r"; |
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} |
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break; |
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} |
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ch = in.read(); |
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} |
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if (ch == -1 && state == 1) { |
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lineEnd = "\r"; |
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} |
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if (includeDelims) { |
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line.append(lineEnd); |
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} |
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return line.toString(); |
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} |
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/** |
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* @return the line ending character(s) for the current line |
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*/ |
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public String getPostToken() { |
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if (includeDelims) { |
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return ""; |
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} |
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return lineEnd; |
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} |
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} |
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Peter Reilly