org.apache.tools.ant.filters
Class ClassConstants
java.lang.Object
  |
  +--java.io.Reader
        |
        +--java.io.FilterReader
              |
              +--org.apache.tools.ant.filters.BaseFilterReader
                    |
                    +--org.apache.tools.ant.filters.ClassConstants
- All Implemented Interfaces: 
- ChainableReader
- public final class ClassConstants- extends BaseFilterReader- implements ChainableReader
Assembles the constants declared in a Java class in
 key1=value1(line separator)key2=value2
 format.
 Notes:
 
 - This filter uses the BCEL external toolkit.
 
- This assembles only those constants that are not created
 using the syntax new whatever()
- This assembles constants declared using the basic datatypes
 and String only.
- The access modifiers of the declared constants do not matter.
Example:
 <classconstants/>
 Or:
 <filterreader
    classname="org.apache.tools.ant.filters.ClassConstants"/>
 
| Fields inherited from class java.io.FilterReader | 
| in | 
 
| Fields inherited from class java.io.Reader | 
| lock | 
 
 
| Method Summary | 
|  java.io.Reader | chain(java.io.Reader rdr)Creates a new ClassConstants using the passed in
 Reader for instantiation.
 | 
|  int | read()Reads and assembles the constants declared in a class file.
 | 
 
 
| Methods inherited from class java.io.FilterReader | 
| close, mark, markSupported, ready, reset | 
 
| Methods inherited from class java.io.Reader | 
| read | 
 
| Methods inherited from class java.lang.Object | 
| clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait | 
 
ClassConstants
public ClassConstants()
- Constructor for "dummy" instances.
 
- See Also:
- BaseFilterReader.BaseFilterReader()
ClassConstants
public ClassConstants(java.io.Reader in)
- Creates a new filtered reader. The contents of the passed-in reader
 are expected to be the name of the class from which to produce a
 list of constants.
 
- Parameters:
- in- A Reader object providing the underlying stream.
           Must not be- null.
read
public final int read()
               throws java.io.IOException
- Reads and assembles the constants declared in a class file.
 
- 
- Overrides:
- readin class- java.io.FilterReader
 
- 
- Returns:
- the next character in the list of constants, or -1
 if the end of the resulting stream has been reached
- Throws:
- java.io.IOException- if the underlying stream throws an IOException
 during reading, or if the constants for the specified class cannot
 be read (for example due to the class not being found).
 
chain
public final java.io.Reader chain(java.io.Reader rdr)
- Creates a new ClassConstants using the passed in
 Reader for instantiation.
 
- 
- Specified by:
- chainin interface- ChainableReader
 
- 
- Parameters:
- rdr- A Reader object providing the underlying stream.
            Must not be- null.
- Returns:
- a new filter based on this configuration, but filtering
         the specified reader
 
Copyright © 2000-2005 Apache Software Foundation. All Rights Reserved.