org.apache.derby.iapi.services.classfile

Class ClassFormatOutput

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

java.io.DataOutputStream

org.apache.derby.iapi.services.classfile.ClassFormatOutput

All Implemented Interfaces:

java.io.Closeable, java.io.DataOutput, java.io.Flushable, java.lang.AutoCloseable

public final class ClassFormatOutput
extends java.io.DataOutputStream

A wrapper around DataOutputStream to provide input functions in terms of the types defined on pages 83 of the Java Virtual Machine spec. For this types use these methods of DataOutputStream

• float - writeFloat
• long - writeLong
• double - writeDouble
• UTF/String - writeUTF
• U1Array - write(byte[])

Field Summary

Fields inherited from class java.io.DataOutputStream

written

Fields inherited from class java.io.FilterOutputStream

out

Constructor Summary

Constructors

Constructor and Description
ClassFormatOutput()
ClassFormatOutput(int size)
ClassFormatOutput(java.io.OutputStream stream)

Method Summary

Modifier and Type	Method and Description
byte[]	getData() Get a reference to the data array the class data is being built in.
(package private) static void	limit(java.lang.String name, int limit, int value) Throw an ClassFormatError if a limit of the Java class file format is reached.
void	putU1(int i)
void	putU2(int i)
void	putU2(java.lang.String limit, int i)
void	putU4(int i)
void	writeTo(java.io.OutputStream outTo)

Methods inherited from class java.io.DataOutputStream

flush, size, write, write, writeBoolean, writeByte, writeBytes, writeChar, writeChars, writeDouble, writeFloat, writeInt, writeLong, writeShort, writeUTF

Methods inherited from class java.io.FilterOutputStream

close, write

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.DataOutput

write

Constructor Detail

ClassFormatOutput

public ClassFormatOutput()

ClassFormatOutput

public ClassFormatOutput(int size)

ClassFormatOutput

public ClassFormatOutput(java.io.OutputStream stream)

Method Detail

putU1

public void putU1(int i)
           throws java.io.IOException

Throws:

java.io.IOException

putU2

public void putU2(int i)
           throws java.io.IOException

Throws:

java.io.IOException

putU2

public void putU2(java.lang.String limit,
                  int i)
           throws java.io.IOException

Throws:

java.io.IOException

putU4

public void putU4(int i)
           throws java.io.IOException

Throws:

java.io.IOException

writeTo

public void writeTo(java.io.OutputStream outTo)
             throws java.io.IOException

Throws:

java.io.IOException

getData

public byte[] getData()

Get a reference to the data array the class data is being built in. No copy is made.

limit

static void limit(java.lang.String name,
                  int limit,
                  int value)
           throws java.io.IOException

Throw an ClassFormatError if a limit of the Java class file format is reached.

Parameters:

name - Terse limit description from JVM spec.

limit - What the limit is.

value - What the value for the current class is

Throws:

java.io.IOException - Thrown when limit is exceeded.