001    /*
002     * Sonar, open source software quality management tool.
003     * Copyright (C) 2008-2012 SonarSource
004     * mailto:contact AT sonarsource DOT com
005     *
006     * Sonar is free software; you can redistribute it and/or
007     * modify it under the terms of the GNU Lesser General Public
008     * License as published by the Free Software Foundation; either
009     * version 3 of the License, or (at your option) any later version.
010     *
011     * Sonar is distributed in the hope that it will be useful,
012     * but WITHOUT ANY WARRANTY; without even the implied warranty of
013     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014     * Lesser General Public License for more details.
015     *
016     * You should have received a copy of the GNU Lesser General Public
017     * License along with Sonar; if not, write to the Free Software
018     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
019     */
020    
021    package org.sonar.squid.text;
022    
023    import java.io.IOException;
024    import java.io.Reader;
025    import java.io.StringReader;
026    
027    public class StringArrayReader extends Reader {
028    
029      private final StringReader stringReader;
030    
031      enum EndOfLineDelimiter {
032        LF, CR_PLUS_LF, CR
033      }
034    
035      public StringArrayReader(String[] lines) {
036        this(lines, EndOfLineDelimiter.LF);
037      }
038    
039      public StringArrayReader(String[] lines, EndOfLineDelimiter endOfLineDelimiter) {
040        if (lines == null) {
041          throw new IllegalStateException("lines object can't be null.");
042        }
043        String content = convertArrayToStringAndAppendEndOfLine(lines, endOfLineDelimiter);
044        stringReader = new StringReader(content);
045      }
046    
047      private String convertArrayToStringAndAppendEndOfLine(String[] lines, EndOfLineDelimiter endOfLineDelimiter) {
048        StringBuilder content = new StringBuilder();
049        for (int i = 0; i < lines.length; i++) {
050          content.append(lines[i]);
051          if (i != (lines.length - 1)) {
052            switch (endOfLineDelimiter) {
053              case LF:
054                content.append('\n');
055                break;
056              case CR:
057                content.append('\r');
058                break;
059              case CR_PLUS_LF:
060                content.append("\r\n");
061                break;
062              default:
063                throw new IllegalStateException(); // should never happen
064            }
065          }
066        }
067        return content.toString();
068      }
069    
070      @Override
071      public void close() throws IOException {
072        stringReader.close();
073      }
074    
075      @Override
076      public boolean ready() throws IOException {
077        return stringReader.ready();
078      }
079    
080      @Override
081      public boolean markSupported() {
082        return stringReader.markSupported();
083      }
084    
085      @Override
086      public void mark(int readAheadLimit) throws IOException {
087        stringReader.mark(readAheadLimit);
088      }
089    
090      @Override
091      public void reset() throws IOException {
092        stringReader.reset();
093      }
094    
095      @Override
096      public int read(char[] cbuf, int off, int len) throws IOException {
097        return stringReader.read(cbuf, off, len);
098      }
099    }