com.aowagie.text.pdf

Class PdfDictionary

java.lang.Object

com.aowagie.text.pdf.PdfObject

com.aowagie.text.pdf.PdfDictionary

Direct Known Subclasses:

PdfAcroForm, PdfAction, PdfAnnotation, PdfCollection, PdfFileSpecification, PdfGState, PdfOutline, PdfShadingPattern, PdfSignature, PdfStream, PdfTargetDictionary

public class PdfDictionary
extends PdfObject

PdfDictionary is the Pdf dictionary object.

A dictionary is an associative table containing pairs of objects. The first element of each pair is called the key and the second element is called the value. Unlike dictionaries in the PostScript language, a key must be a PdfName. A value can be any kind of PdfObject, including a dictionary. A dictionary is generally used to collect and tie together the attributes of a complex object, with each key-value pair specifying the name and value of an attribute.
A dictionary is represented by two left angle brackets (<<), followed by a sequence of key-value pairs, followed by two right angle brackets (>>).
This object is described in the 'Portable Document Format Reference Manual version 1.7' section 3.2.6 (page 59-60).

See Also:

PdfObject, PdfName, BadPdfFormatException

Field Summary

Fields

Modifier and Type	Field and Description
protected HashMap<PdfName,PdfObject>	hashMap This is the hashmap that contains all the values and keys of the dictionary

Fields inherited from class com.aowagie.text.pdf.PdfObject

ARRAY, bytes, INDIRECT, STREAM, TEXT_UNICODE, type

Constructor Summary

Constructors

Constructor and Description
PdfDictionary() Constructs an empty PdfDictionary-object.
PdfDictionary(PdfName type) Constructs a PdfDictionary-object of a certain type.

Method Summary

Modifier and Type	Method and Description
PdfObject	get(PdfName key) Returns the PdfObject associated to the specified key.
PdfArray	getAsArray(PdfName key) Returns a PdfObject as a PdfArray, resolving indirect references.
PdfDictionary	getAsDict(PdfName key) Returns a PdfObject as a PdfDictionary, resolving indirect references.
PdfName	getAsName(PdfName key) Returns a PdfObject as a PdfName, resolving indirect references.
PdfNumber	getAsNumber(PdfName key) Returns a PdfObject as a PdfNumber, resolving indirect references.
PdfString	getAsString(PdfName key) Returns a PdfObject as a PdfString, resolving indirect references.
PdfObject	getDirectObject(PdfName key) Returns the PdfObject associated to the specified key, resolving a possible indirect reference to a direct object.
Set<PdfName>	getKeys() Get all keys that are set.
boolean	isCatalog() Checks if a Dictionary is of the type CATALOG.
boolean	isFont() Checks if a Dictionary is of the type FONT.
boolean	isOutlineTree() Checks if a Dictionary is of the type OUTLINES.
boolean	isPage() Checks if a Dictionary is of the type PAGE.
boolean	isPages() Checks if a Dictionary is of the type PAGES.
void	put(PdfName key, PdfObject object) Associates the specified PdfObject as value with the specified PdfName as key in this map.
void	remove(PdfName key) Removes a PdfObject and its key from the PdfDictionary.
int	size() Returns the number of key-value mappings in this PdfDictionary.
void	toPdf(PdfWriter writer, OutputStream os) Writes the PDF representation of this PdfDictionary as an array of byte to the given OutputStream.
String	toString() Returns a string representation of this PdfDictionary.

Methods inherited from class com.aowagie.text.pdf.PdfObject

getBytes, getIndRef, isArray, isBoolean, isDictionary, isIndirect, isName, isNull, isNumber, isStream, isString, setContent, setIndRef, type

Methods inherited from class java.lang.Object

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

Field Detail

hashMap

protected HashMap<PdfName,PdfObject> hashMap

This is the hashmap that contains all the values and keys of the dictionary

Constructor Detail

PdfDictionary

public PdfDictionary()

Constructs an empty PdfDictionary-object.

PdfDictionary

public PdfDictionary(PdfName type)

Constructs a PdfDictionary-object of a certain type.

Parameters:

type - a PdfName

Method Detail

toPdf

public void toPdf(PdfWriter writer,
                  OutputStream os)
           throws IOException

Writes the PDF representation of this PdfDictionary as an array of byte to the given OutputStream.

Overrides:

toPdf in class PdfObject

Parameters:

writer - for backwards compatibility

os - the OutputStream to write the bytes to.

Throws:

IOException - Exception with a I/O error

toString

public String toString()

Returns a string representation of this PdfDictionary. The string doesn't contain any of the content of this dictionary. Rather the string "dictionary" is returned, possibly followed by the type of this PdfDictionary, if set.

Overrides:

toString in class PdfObject

Returns:

the string representation of this PdfDictionary

See Also:

PdfObject.toString()

put

public void put(PdfName key,
                PdfObject object)

Associates the specified PdfObject as value with the specified PdfName as key in this map. If the map previously contained a mapping for this key, the old value is replaced. If the value is null or PdfNull the key is deleted.

Parameters:

key - a PdfName

object - the PdfObject to be associated with the key

remove

public void remove(PdfName key)

Removes a PdfObject and its key from the PdfDictionary.

Parameters:

key - a PdfName

get

public PdfObject get(PdfName key)

Returns the PdfObject associated to the specified key.

Parameters:

key - a PdfName

Returns:

the PdfObject previously associated to the key

getDirectObject

public PdfObject getDirectObject(PdfName key)

Returns the PdfObject associated to the specified key, resolving a possible indirect reference to a direct object. This method will never return a PdfIndirectReference object.

Parameters:

key - A key for the PdfObject to be returned

Returns:

A direct PdfObject or null

getKeys

public Set<PdfName> getKeys()

Get all keys that are set.

Returns:

true if it is, otherwise false.

size

public int size()

Returns the number of key-value mappings in this PdfDictionary.

Returns:

the number of key-value mappings in this PdfDictionary.

isFont

public boolean isFont()

Checks if a Dictionary is of the type FONT.

Returns:

true if it is, otherwise false.

isPage

public boolean isPage()

Checks if a Dictionary is of the type PAGE.

Returns:

true if it is, otherwise false.

isPages

public boolean isPages()

Checks if a Dictionary is of the type PAGES.

Returns:

true if it is, otherwise false.

isCatalog

public boolean isCatalog()

Checks if a Dictionary is of the type CATALOG.

Returns:

true if it is, otherwise false.

isOutlineTree

public boolean isOutlineTree()

Checks if a Dictionary is of the type OUTLINES.

Returns:

true if it is, otherwise false.

getAsDict

public PdfDictionary getAsDict(PdfName key)

Returns a PdfObject as a PdfDictionary, resolving indirect references. The object associated with the PdfName given is retrieved and resolved to a direct object. If it is a PdfDictionary, it is cast down and returned as such. Otherwise null is returned.

Parameters:

key - A PdfName

Returns:

the associated PdfDictionary object, or null

getAsArray

public PdfArray getAsArray(PdfName key)

Returns a PdfObject as a PdfArray, resolving indirect references. The object associated with the PdfName given is retrieved and resolved to a direct object. If it is a PdfArray, it is cast down and returned as such. Otherwise null is returned.

Parameters:

key - A PdfName

Returns:

the associated PdfArray object, or null

getAsString

public PdfString getAsString(PdfName key)

Returns a PdfObject as a PdfString, resolving indirect references. The object associated with the PdfName given is retrieved and resolved to a direct object. If it is a PdfString, it is cast down and returned as such. Otherwise null is returned.

Parameters:

key - A PdfName

Returns:

the associated PdfString object, or null

getAsNumber

public PdfNumber getAsNumber(PdfName key)

Returns a PdfObject as a PdfNumber, resolving indirect references. The object associated with the PdfName given is retrieved and resolved to a direct object. If it is a PdfNumber, it is cast down and returned as such. Otherwise null is returned.

Parameters:

key - A PdfName

Returns:

the associated PdfNumber object, or null

getAsName

public PdfName getAsName(PdfName key)

Returns a PdfObject as a PdfName, resolving indirect references. The object associated with the PdfName given is retrieved and resolved to a direct object. If it is a PdfName, it is cast down and returned as such. Otherwise null is returned.

Parameters:

key - A PdfName

Returns:

the associated PdfName object, or null