org.freehep.util.io
Class ConditionalInputStream

java.lang.Object
  java.io.InputStream
      org.freehep.util.io.DecodingInputStream
          org.freehep.util.io.ConditionalInputStream

All Implemented Interfaces:

Closeable

public class ConditionalInputStream
extends DecodingInputStream

The ConditionalInputStream reads a stream and filters certain parts depending of properties and statements in the input.

The following statements, all start with the &at;-sign, are allowed:

• @ifdef property, reads everything up to the next

  if the property is defined.

• @ifndef property, reads everything up to the next

  if the property is not defined.

• @else, corresponding else statement
• @endif, corresponging endif statement

The &at;-sign itself must be escaped by a backslash, if used in the text followed by any of the keywords described above and no action should be taken.

Author:

Mark Donszelmann

Constructor Summary

ConditionalInputStream(InputStream input, Properties defines)
Creates a Conditional Input Stream from given stream.

Method Summary

int

read()

Methods inherited from class org.freehep.util.io.DecodingInputStream

read

Methods inherited from class java.io.InputStream

available, close, mark, markSupported, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

ConditionalInputStream

public ConditionalInputStream(InputStream input,
                              Properties defines)

Creates a Conditional Input Stream from given stream.

Parameters:

input - stream to read from

defines - set of properties to be used in ifdefs

Method Detail

read

public int read()
         throws IOException

Specified by:

read in class InputStream

Throws:

IOException