ClassReader (JAXRPC API) - JBoss 4.0.1 sp1 jaxrpc API Documentation 英文版文档

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org.apache.axis.utils.bytecode
Class ClassReader

java.lang.Object
  java.io.InputStream
      java.io.ByteArrayInputStream
          org.apache.axis.utils.bytecode.ClassReader

Direct Known Subclasses:: ParamReader

public class ClassReader
extends ByteArrayInputStream

This is the class file reader for obtaining the parameter names for declared methods in a class. The class must have debugging attributes for us to obtain this information.

This does not work for inherited methods. To obtain parameter names for inherited methods, you must use a paramReader for the class that originally declared the method.

don't get tricky, it's the bare minimum. Instances of this class are not threadsafe -- don't share them.

Author:: Edwin Smith, Macromedia

Field Summary

Fields inherited from class java.io.ByteArrayInputStream

buf, count, mark, pos

Constructor Summary

protected ClassReader(byte[] buf, Map attrMethods)


Method Summary

protected static Map findAttributeReaders(Class c)


protected static byte[] getBytes(Class c)
          load the bytecode for a given class, by using the class's defining classloader and assuming that for a class named P.C, the bytecodes are in a resource named /P/C.class.

protected static String getSignature(Member method, Class[] paramTypes)


protected void readAttributes()
          read an attributes array.

void readCode()
          read a code attribute

protected void readCpool()


protected int readInt()


protected int readShort()


protected Class resolveClass(int i)


protected Field resolveField(int i)


protected Member resolveMethod(int index)


protected org.apache.axis.utils.bytecode.ClassReader.NameAndType resolveNameAndType(int i)


protected String resolveUtf8(int i)


protected void skipAttributes()


protected void skipFully(int n)
          skip n bytes in the input stream.

Methods inherited from class java.io.ByteArrayInputStream

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

Methods inherited from class java.io.InputStream

read

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassReader

protected ClassReader(byte[] buf,
                      Map attrMethods)

Method Detail

getBytes

protected static byte[] getBytes(Class c)
                          throws IOException

load the bytecode for a given class, by using the class's defining classloader and assuming that for a class named P.C, the bytecodes are in a resource named /P/C.class.

Parameters:: c - the class of interest
Returns:: a byte array containing the bytecode
Throws:: IOException

findAttributeReaders

protected static Map findAttributeReaders(Class c)

getSignature

protected static String getSignature(Member method,
                                     Class[] paramTypes)

readShort

protected final int readShort()

Returns:: the next unsigned 16 bit value

readInt

protected final int readInt()

Returns:: the next signed 32 bit value

skipFully

protected void skipFully(int n)
                  throws IOException

skip n bytes in the input stream.

Throws:: IOException

resolveMethod

protected final Member resolveMethod(int index)
                              throws IOException,
                                     ClassNotFoundException,
                                     NoSuchMethodException

Throws:: IOException; ClassNotFoundException; NoSuchMethodException

resolveField

protected final Field resolveField(int i)
                            throws IOException,
                                   ClassNotFoundException,
                                   NoSuchFieldException

Throws:: IOException; ClassNotFoundException; NoSuchFieldException

resolveNameAndType

protected final org.apache.axis.utils.bytecode.ClassReader.NameAndType resolveNameAndType(int i)
                                                                                   throws IOException

Throws:: IOException

resolveClass

protected final Class resolveClass(int i)
                            throws IOException,
                                   ClassNotFoundException

Throws:: IOException; ClassNotFoundException

resolveUtf8

protected final String resolveUtf8(int i)
                            throws IOException

Throws:: IOException

readCpool

protected final void readCpool()
                        throws IOException

Throws:: IOException

skipAttributes

protected final void skipAttributes()
                             throws IOException

Throws:: IOException

readAttributes

protected final void readAttributes()
                             throws IOException

read an attributes array. the elements of a class file that can contain attributes are: fields, methods, the class itself, and some other types of attributes.

Throws:: IOException

readCode

public void readCode()
              throws IOException

read a code attribute

Throws:: IOException