Class ClassConstants

All Implemented Interfaces:
Closeable, AutoCloseable, Readable, 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.


  1. This filter uses the BCEL external toolkit.
  2. This assembles only those constants that are not created using the syntax new whatever()
  3. This assembles constants declared using the basic datatypes and String only.
  4. The access modifiers of the declared constants do not matter.


  • Constructor Details

    • ClassConstants

      public ClassConstants()
      Constructor for "dummy" instances.
      See Also:
    • ClassConstants

      public ClassConstants(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.
      in - A Reader object providing the underlying stream. Must not be null.
  • Method Details

    • read

      public int read() throws IOException
      Reads and assembles the constants declared in a class file.
      read in class FilterReader
      the next character in the list of constants, or -1 if the end of the resulting stream has been reached
      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 Reader chain(Reader rdr)
      Creates a new ClassConstants using the passed in Reader for instantiation.
      Specified by:
      chain in interface ChainableReader
      rdr - A Reader object providing the underlying stream. Must not be null.
      a new filter based on this configuration, but filtering the specified reader