de.intarsys.pdf.font
Class CMap

java.lang.Object
  de.intarsys.pdf.cos.COSBasedObject
      de.intarsys.pdf.font.CMap

All Implemented Interfaces:

ICOSObjectListener, de.intarsys.tools.attribute.IAttributeSupport

Direct Known Subclasses:

IdentityCMap, StreamBasedCMap

public abstract class CMap
extends COSBasedObject

A character map. This object can map from codepoints to CID's which can be used to select glyphs in a CID keyed font object.

Nested Class Summary

static class

CMap.MetaClass The meta class implementation

Field Summary

static CMap.MetaClass

META The meta class instance

Method Summary

abstract char[]	getChars(int codepoint) Get the char[] for the codepoint or null if not available.
abstract int	getDecoded(int codepoint) Get the character for the codepoint or -1 if not available.
abstract int	getEncoded(int character) Get the codepoint for the the character or -1 if invalid.
abstract int	getNextDecoded(InputStream is) Get the next decoded character from the input stream.
abstract int	getNextEncoded(InputStream is) The next codepoint from the input stream.
abstract void	putNextDecoded(OutputStream os, int character) Put the next character onto the input stream after encoding.
abstract void	putNextEncoded(OutputStream os, int codepoint) Put the next codepoint onto the input stream.
static int	toInt(byte[] bytes)
static int	toInt(byte[] bytes, int offset, int length)

Methods inherited from class de.intarsys.pdf.cos.COSBasedObject

changed, cosGetArray, cosGetDict, cosGetDoc, cosGetField, cosGetObject, cosGetStream, cosHasField, cosRemoveField, cosSetField, getAttribute, getFieldBoolean, getFieldDate, getFieldFixed, getFieldFixedArray, getFieldInt, getFieldMLString, getFieldString, invalidateCaches, removeAttribute, setAttribute, setFieldBoolean, setFieldFixed, setFieldInt, setFieldMLString, setFieldName, setFieldObject, setFieldString, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

META

public static final CMap.MetaClass META

The meta class instance

Method Detail

toInt

public static int toInt(byte[] bytes)

toInt

public static int toInt(byte[] bytes,
                        int offset,
                        int length)

getChars

public abstract char[] getChars(int codepoint)

Get the char[] for the codepoint or null if not available. This is used in /ToUnicode mappings where a codepoint may map to a string (as for example in ligatures).

Parameters:

codepoint - The codepoint

Returns:

The corresponding char[] for the codepoint.

getDecoded

public abstract int getDecoded(int codepoint)

Get the character for the codepoint or -1 if not available.

Parameters:

codepoint - The codepoint

Returns:

Get the character for the codepoint or -1 if not available.

getEncoded

public abstract int getEncoded(int character)

Get the codepoint for the the character or -1 if invalid.

Parameters:

character - The character to look up.

Returns:

Get the codepoint for the the character or -1 if invalid.

getNextDecoded

public abstract int getNextDecoded(InputStream is)
                            throws IOException

Get the next decoded character from the input stream. This method reads as much bytes as needed by the encoding and returns the decoded character.

Parameters:

is - The input stream with encoded data.

Returns:

The next decoded character from the input stream.

Throws:

IOException

getNextEncoded

public abstract int getNextEncoded(InputStream is)
                            throws IOException

The next codepoint from the input stream. This method reads as much bytes as needed by the encoding and returns the complete multibyte codepoint.

Parameters:

is - The input stream with encoded data.

Returns:

The next codepoint from the input stream.

Throws:

IOException

putNextDecoded

public abstract void putNextDecoded(OutputStream os,
                                    int character)
                             throws IOException

Put the next character onto the input stream after encoding. This method writes as much bytes as needed by the encoding.

Parameters:

os - The stream to write the bytes.

character - The character to be encoded.

Throws:

IOException

putNextEncoded

public abstract void putNextEncoded(OutputStream os,
                                    int codepoint)
                             throws IOException

Put the next codepoint onto the input stream. This method writes as much bytes as needed by the encoding.

Parameters:

os - The stream to write the bytes.

codepoint - The codepoint.

Throws:

IOException