org.cdlib.xtf.util

Class DocTypeDeclRemover

Object

InputStream

FilterInputStream

BufferedInputStream

DocTypeDeclRemover

All Implemented Interfaces:

Closeable, AutoCloseable

public class DocTypeDeclRemover
extends BufferedInputStream

The parser that comes with the JDK always tries to resolve DOCTYPE declarations in an XML file, but will barf if it can't. We want to be able to work with such documents regardless of whether the DOCTYPE is resolvable or not. Hence this class, which filters out DOCTYPE declarations entirely.

Field Summary

Fields

Modifier and Type	Field and Description
private static int	BLOCK_SIZE How many bytes to scan before giving up
private boolean	firstTime Marks whether we've scanned the initial block for a DOCTYPE decl

Fields inherited from class BufferedInputStream

buf, count, marklimit, markpos, pos

Fields inherited from class FilterInputStream

in

Constructor Summary

Constructors

Constructor and Description
DocTypeDeclRemover(InputStream in) Default constructor: records the input stream to filter.

Method Summary

Modifier and Type	Method and Description
private int	findEnd(String s, int start)
int	read() See the general contract of the read method of InputStream.
int	read(byte[] b, int off, int len) Read a block of bytes.

Methods inherited from class BufferedInputStream

available, close, mark, markSupported, reset, skip

Methods inherited from class FilterInputStream

read

Methods inherited from class Object

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

Field Detail

firstTime

private boolean firstTime

Marks whether we've scanned the initial block for a DOCTYPE decl

BLOCK_SIZE

private static final int BLOCK_SIZE

How many bytes to scan before giving up

See Also:

Constant Field Values

Constructor Detail

DocTypeDeclRemover

public DocTypeDeclRemover(InputStream in)

Default constructor: records the input stream to filter.

Method Detail

read

public int read()
         throws IOException

See the general contract of the read method of InputStream.

Overrides:

read in class BufferedInputStream

Returns:

the next byte of data, or -1 if the end of the stream is reached.

Throws:

IOException - if an I/O error occurs.

See Also:

FilterInputStream.in

read

public int read(byte[] b,
                int off,
                int len)
         throws IOException

Read a block of bytes. The first BLOCK_SIZE bytes will be scanned for a DOCTYPE declaration, and if one is found it will be converted to an XML comment.

Overrides:

read in class BufferedInputStream

Parameters:

b - Buffer to read into

off - Byte offset to read into

len - Number of bytes to read

Returns:

Number of bytes read, or -1 if the end of the stream has been reached.

Throws:

IOException - if an I/O error occurs.

findEnd

private int findEnd(String s,
                    int start)