Docjar: com/sitemesh/parser/AbstractPageParser.java

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Source code: com/sitemesh/parser/AbstractPageParser.java

1   package com.sitemesh.parser;
2   
3   import com.sitemesh.Page;
4   import com.sitemesh.PageParser;
5   import java.io.*;
6   import org.xml.sax.InputSource;
7   
8   /**
9    * Abstract implementation of {@link com.sitemesh.PageParser}.
10   * All methods convert input into <code>byte[]</code>, meaning only that
11   * method need be implemented.
12   *
13   * @author <a href="joe@truemesh.com">Joe Walnes</a>
14   * @version $Revision: 1.5 $
15   *
16   * @see com.sitemesh.PageParser
17   */
18  public abstract class AbstractPageParser implements PageParser {
19  
20    /**
21     * Method to be implemented by sub-classes.
22     *
23     * @see com.sitemesh.PageParser
24     */
25    public abstract Page parse( byte[] data ) throws IOException;
26  
27    public Page parse( InputStream in ) throws IOException {
28      ByteArrayOutputStream data = new ByteArrayOutputStream();
29      while ( true ) {
30        int i = in.read();
31        if ( i == -1 ) break;
32        data.write( i );
33      }
34      return parse( data.toByteArray() ); // byte[]
35    }
36  
37    public Page parse( Reader in ) throws IOException {
38      CharArrayWriter data = new CharArrayWriter();
39      while ( true ) {
40        int i = in.read();
41        if ( i == -1 ) break;
42        data.write( i );
43      }
44      return parse( data.toCharArray() ); // char[]
45    }
46  
47    public Page parse( InputSource in ) throws IOException {
48      if ( in.getCharacterStream() != null ) {
49        return parse( in.getCharacterStream() ); // Reader
50      }
51      else if ( in.getByteStream() != null ) {
52        return parse( in.getByteStream() ); // InputStream
53      }
54      else {
55        throw new IllegalStateException( "InputSource must contain Character-Stream or Byte-Stream" );
56      }
57    }
58  
59    public Page parse( char[] data ) throws IOException {
60      ByteArrayOutputStream bytes = new ByteArrayOutputStream();
61      new OutputStreamWriter( bytes ).write( data );
62      return parse( bytes.toByteArray() ); // byte[]
63    }
64  
65  }