org.codehaus.swizzle.stream
Class StreamLexer

java.lang.Object
  org.codehaus.swizzle.stream.StreamLexer

public class StreamLexer
extends Object

Version:

$Revision$ $Date$

Constructor Summary

StreamLexer(InputStream delegate)

Method Summary

StreamLexer	mark()
StreamLexer	mark(String limit)
String	peek(String string)
String	peek(String begin, String end)
String	read(String string)
String	read(String begin, String end)
boolean	readAndMark(String begin, String end)
boolean	readAndUnmark()
String	readToken(String string) Seeks in the stream till it finds and has completely read the token, then stops.
String	readToken(String begin, String end) Seeks in the stream till it finds the start token, reads into a buffer till it finds the end token, then returns the token (the buffer) as a String.
String	seek(String string)
String	seek(String begin, String end)
boolean	seekAndMark(String begin, String end)
boolean	seekAndUnmark()
void	unmark()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StreamLexer

public StreamLexer(InputStream delegate)

Method Detail

readToken

public String readToken(String begin,
                        String end)
                 throws Exception

Seeks in the stream till it finds the start token, reads into a buffer till it finds the end token, then returns the token (the buffer) as a String. Given the input stream contained the sequence "123ABC456EFG" InputStream in ... StreamLexer lexer = new StreamLexer(in); String token = lexer.readToken("3","C"); // returns the string "AB" char character = (char)in.read(); // returns the character '4' Does not support regular expression matching.

Parameters:

begin - start token

end - end token

Returns:

the token inbetween the start and end token or null if the end of the stream was reached

Throws:

Exception

readToken

public String readToken(String string)
                 throws Exception

Seeks in the stream till it finds and has completely read the token, then stops. Useful for seeking up to a certain point in the stream. Given the input stream contained the sequence "000[A]111[B]222[C]345[D]" InputStream in ... StreamLexer lexer = new StreamLexer(in); String token = lexer.readToken("222"); // returns the string "222" token = lexer.readToken("[", "]"); // returns the string "C" char character = (char)in.read(); // returns the character '3' Does not support regular expression matching.

Parameters:

string - the token to find in the stream

Returns:

the token if found in the stream or null if the stream was reached (i.e. the token was not found)

Throws:

Exception

read

public String read(String begin,
                   String end)
            throws IOException

Throws:

IOException

read

public String read(String string)
            throws IOException

Throws:

IOException

seek

public String seek(String begin,
                   String end)
            throws IOException

Throws:

IOException

seek

public String seek(String string)
            throws IOException

Throws:

IOException

peek

public String peek(String begin,
                   String end)
            throws IOException

Throws:

IOException

peek

public String peek(String string)
            throws IOException

Throws:

IOException

mark

public StreamLexer mark()
                 throws IOException

Throws:

IOException

unmark

public void unmark()

mark

public StreamLexer mark(String limit)
                 throws IOException

Throws:

IOException

readAndMark

public boolean readAndMark(String begin,
                           String end)
                    throws IOException

Throws:

IOException

seekAndMark

public boolean seekAndMark(String begin,
                           String end)
                    throws IOException

Throws:

IOException

readAndUnmark

public boolean readAndUnmark()
                      throws IOException

Throws:

IOException

seekAndUnmark

public boolean seekAndUnmark()
                      throws IOException

Throws:

IOException