org.apache.poi.ooxml

Class POIXMLDocumentPart

java.lang.Object

org.apache.poi.ooxml.POIXMLDocumentPart

Direct Known Subclasses:

CalculationChain, CommentsTable, ExternalLinksTable, MapInfo, POIXMLDocument, SharedStringsTable, SingleXmlCells, StylesTable, ThemesTable, XDDFChart, XDGFXMLDocumentPart, XSLFCommentAuthors, XSLFComments, XSLFDiagramDrawing, XSLFFontData, XSLFObjectData, XSLFPictureData, XSLFSheet, XSLFTableStyles, XSLFTheme, XSSFDrawing, XSSFPictureData, XSSFPivotCache, XSSFPivotCacheDefinition, XSSFPivotCacheRecords, XSSFPivotTable, XSSFSheet, XSSFTable, XSSFVBAPart, XSSFVMLDrawing, XWPFAbstractFootnotesEndnotes, XWPFComments, XWPFHeaderFooter, XWPFNumbering, XWPFPictureData, XWPFSettings, XWPFStyles, XWPFTheme

public class POIXMLDocumentPart
extends Object

Represents an entry of a OOXML package.

Each POIXMLDocumentPart keeps a reference to the underlying a PackagePart.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	POIXMLDocumentPart.RelationPart The RelationPart is a cached relationship between the document, which contains the RelationPart, and one of its referenced child document parts.

Constructor Summary

Constructors

Constructor and Description
POIXMLDocumentPart() Creates new POIXMLDocumentPart - called by client code to create new parts from scratch.
POIXMLDocumentPart(OPCPackage pkg) Construct POIXMLDocumentPart representing a "core document" package part.
POIXMLDocumentPart(OPCPackage pkg, String coreDocumentRel) Construct POIXMLDocumentPart representing a custom "core document" package part.
POIXMLDocumentPart(PackagePart part) Creates an POIXMLDocumentPart representing the given package part and relationship.
POIXMLDocumentPart(POIXMLDocumentPart parent, PackagePart part) Creates an POIXMLDocumentPart representing the given package part, relationship and parent Called by read(POIXMLFactory, Map) when reading in an existing file.

Method Summary

Modifier and Type	Method and Description
static void	_invokeOnDocumentRead(POIXMLDocumentPart part) Deprecated. This method only exists to allow access to protected onDocumentRead() from XWPFDocument without reflection. It should be removed.
POIXMLDocumentPart.RelationPart	addRelation(String relId, POIXMLRelation relationshipType, POIXMLDocumentPart part) Add a new child POIXMLDocumentPart
protected void	commit() Save the content in the underlying package part.
POIXMLDocumentPart	createRelationship(POIXMLRelation descriptor, POIXMLFactory factory) Create a new child POIXMLDocumentPart
POIXMLDocumentPart	createRelationship(POIXMLRelation descriptor, POIXMLFactory factory, int idx) Create a new child POIXMLDocumentPart
POIXMLDocumentPart.RelationPart	createRelationship(POIXMLRelation descriptor, POIXMLFactory factory, int idx, boolean noRelation) Create a new child POIXMLDocumentPart
int	getNextPartNumber(POIXMLRelation descriptor, int minIdx) Identifies the next available part number for a part of the given type, if possible, otherwise -1 if none are available.
PackagePart	getPackagePart() Provides access to the underlying PackagePart
POIXMLDocumentPart	getParent() Returns the parent POIXMLDocumentPart.
POIXMLDocumentPart	getRelationById(String id) Returns the target POIXMLDocumentPart, where a PackageRelationship is set from the PackagePart of this POIXMLDocumentPart to the PackagePart of the target POIXMLDocumentPart with a PackageRelationship.getId() matching the given parameter value.
String	getRelationId(POIXMLDocumentPart part) Returns the first PackageRelationship.getId() of the PackageRelationship, that sources from the PackagePart of this POIXMLDocumentPart to the PackagePart of the given parameter value.
POIXMLDocumentPart.RelationPart	getRelationPartById(String id) Returns the target POIXMLDocumentPart.RelationPart, where a PackageRelationship is set from the PackagePart of this POIXMLDocumentPart to the PackagePart of the target POIXMLDocumentPart with a PackageRelationship.getId() matching the given parameter value.
List<POIXMLDocumentPart.RelationPart>	getRelationParts() Returns the list of child relations for this POIXMLDocumentPart
List<POIXMLDocumentPart>	getRelations() Returns the list of child relations for this POIXMLDocumentPart
protected PackagePart	getTargetPart(PackageRelationship rel) Get the PackagePart that is the target of a relationship from this Part.
boolean	isCommitted() to check whether embedded part is already committed
protected void	onDocumentCreate() Fired when a new package part is created
protected void	onDocumentRead() Fired when a package part is read
protected void	onDocumentRemove() Fired when a package part is about to be removed from the package
protected void	onSave(Set<PackagePart> alreadySaved) Save changes in the underlying OOXML package.
protected void	prepareForCommit() Ensure that a memory based package part does not have lingering data from previous commit() calls.
protected void	read(POIXMLFactory factory, Map<PackagePart,POIXMLDocumentPart> context) Iterate through the underlying PackagePart and create child POIXMLFactory instances using the specified factory
protected void	rebase(OPCPackage pkg) When you open something like a theme, call this to re-base the XML Document onto the core child of the current core document
protected void	removeRelation(POIXMLDocumentPart part) Remove the relation to the specified part in this package and remove the part, if it is no longer needed.
protected boolean	removeRelation(POIXMLDocumentPart part, boolean removeUnusedParts) Remove the relation to the specified part in this package and remove the part, if it is no longer needed and flag is set to true.
protected void	removeRelation(String partId) Remove the relation to the specified part in this package and remove the part, if it is no longer needed.
void	setCommitted(boolean isCommitted) setter method to set embedded part is committed
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

POIXMLDocumentPart

public POIXMLDocumentPart(OPCPackage pkg)

Construct POIXMLDocumentPart representing a "core document" package part.

Parameters:

pkg - the OPCPackage containing this document

POIXMLDocumentPart

public POIXMLDocumentPart(OPCPackage pkg,
                          String coreDocumentRel)

Construct POIXMLDocumentPart representing a custom "core document" package part.

Parameters:

pkg - the OPCPackage containing this document

coreDocumentRel - the relation type of this document

POIXMLDocumentPart

public POIXMLDocumentPart()

Creates new POIXMLDocumentPart - called by client code to create new parts from scratch.

See Also:

createRelationship(POIXMLRelation, POIXMLFactory, int, boolean)

POIXMLDocumentPart

public POIXMLDocumentPart(PackagePart part)

Creates an POIXMLDocumentPart representing the given package part and relationship. Called by read(POIXMLFactory, Map) when reading in an existing file.

Parameters:

part - - The package part that holds xml data representing this sheet.

Since:

POI 3.14-Beta1

See Also:

read(POIXMLFactory, Map)

POIXMLDocumentPart

public POIXMLDocumentPart(POIXMLDocumentPart parent,
                          PackagePart part)

Creates an POIXMLDocumentPart representing the given package part, relationship and parent Called by read(POIXMLFactory, Map) when reading in an existing file.

Parameters:

parent - - Parent part

part - - The package part that holds xml data representing this sheet.

Since:

POI 3.14-Beta1

See Also:

read(POIXMLFactory, Map)

Method Detail

isCommitted

public boolean isCommitted()

to check whether embedded part is already committed

Returns:

return true if embedded part is committed

Since:

4.1.2

setCommitted

public void setCommitted(boolean isCommitted)

setter method to set embedded part is committed

Parameters:

isCommitted - boolean value

rebase

protected final void rebase(OPCPackage pkg)
                     throws InvalidFormatException

When you open something like a theme, call this to re-base the XML Document onto the core child of the current core document

Parameters:

pkg - the package to be rebased

Throws:

InvalidFormatException - if there was an error in the core document relation

IllegalStateException - if there are more than one core document relations

getPackagePart

public final PackagePart getPackagePart()

Provides access to the underlying PackagePart

Returns:

the underlying PackagePart

getRelations

public final List<POIXMLDocumentPart> getRelations()

Returns the list of child relations for this POIXMLDocumentPart

Returns:

child relations

getRelationParts

public final List<POIXMLDocumentPart.RelationPart> getRelationParts()

Returns the list of child relations for this POIXMLDocumentPart

Returns:

child relations

getRelationById

public final POIXMLDocumentPart getRelationById(String id)

Returns the target POIXMLDocumentPart, where a PackageRelationship is set from the PackagePart of this POIXMLDocumentPart to the PackagePart of the target POIXMLDocumentPart with a PackageRelationship.getId() matching the given parameter value.

Parameters:

id - The relation id to look for

Returns:

the target part of the relation, or null, if none exists

getRelationPartById

public final POIXMLDocumentPart.RelationPart getRelationPartById(String id)

Returns the target POIXMLDocumentPart.RelationPart, where a PackageRelationship is set from the PackagePart of this POIXMLDocumentPart to the PackagePart of the target POIXMLDocumentPart with a PackageRelationship.getId() matching the given parameter value.

Parameters:

id - The relation id to look for

Returns:

the target relation part, or null, if none exists

Since:

4.0.0

getRelationId

public final String getRelationId(POIXMLDocumentPart part)

Returns the first PackageRelationship.getId() of the PackageRelationship, that sources from the PackagePart of this POIXMLDocumentPart to the PackagePart of the given parameter value.

There can be multiple references to the given POIXMLDocumentPart and only the first in the order of creation is returned.

Parameters:

part - The POIXMLDocumentPart for which the according relation-id shall be found.

Returns:

The value of the PackageRelationship.getId() or null, if parts are not related.

addRelation

public final POIXMLDocumentPart.RelationPart addRelation(String relId,
                                                         POIXMLRelation relationshipType,
                                                         POIXMLDocumentPart part)

Add a new child POIXMLDocumentPart

Parameters:

relId - the preferred relation id, when null the next free relation id will be used

relationshipType - the package relationship type

part - the child to add

Returns:

the new RelationPart

Since:

3.14-Beta1

removeRelation

protected final void removeRelation(POIXMLDocumentPart part)

Remove the relation to the specified part in this package and remove the part, if it is no longer needed.

If there are multiple relationships to the same part, this will only remove the first relationship in the order of creation. The removal via the part id (removeRelation(String) is preferred.

Parameters:

part - the part which relation is to be removed from this document

removeRelation

protected final boolean removeRelation(POIXMLDocumentPart part,
                                       boolean removeUnusedParts)

Remove the relation to the specified part in this package and remove the part, if it is no longer needed and flag is set to true.

If there are multiple relationships to the same part, this will only remove the first relationship in the order of creation. The removal via the part id (removeRelation(String, boolean) is preferred.

Parameters:

part - The related part, to which the relation shall be removed.

removeUnusedParts - true, if the part shall be removed from the package if not needed any longer.

Returns:

true, if the relation was removed

removeRelation

protected final void removeRelation(String partId)

Remove the relation to the specified part in this package and remove the part, if it is no longer needed.

If there are multiple relationships to the same part, this will only remove the first relationship in the order of creation. The removal via the part id (removeRelation(POIXMLDocumentPart) is preferred.

Parameters:

partId - the part id which relation is to be removed from this document

Since:

4.0.0

getParent

public final POIXMLDocumentPart getParent()

Returns the parent POIXMLDocumentPart. All parts except root have not-null parent.

Returns:

the parent POIXMLDocumentPart or null for the root element.

toString

public String toString()

Overrides:

toString in class Object

commit

protected void commit()
               throws IOException

Save the content in the underlying package part. Default implementation is empty meaning that the package part is left unmodified.

Sub-classes should override and add logic to marshal the "model" into Ooxml4J.

For example, the code saving a generic XML entry may look as follows:

 protected void commit() throws IOException {
   PackagePart part = getPackagePart();
   try (OutputStream out = part.getOutputStream()) {
     XmlObject bean = getXmlBean(); //the "model" which holds changes in memory
     bean.save(out, DEFAULT_XML_OPTIONS);
   }
 }
 

Throws:

IOException - a subclass may throw an IOException if the changes can't be committed

onSave

protected final void onSave(Set<PackagePart> alreadySaved)
                     throws IOException

Save changes in the underlying OOXML package. Recursively fires commit() for each package part

Parameters:

alreadySaved - context set containing already visited nodes

Throws:

IOException - a related part may throw an IOException if the changes can't be saved

prepareForCommit

protected void prepareForCommit()

Ensure that a memory based package part does not have lingering data from previous commit() calls.

Note: This is overwritten for some objects, as *PictureData seem to store the actual content in the part directly without keeping a copy like all others therefore we need to handle them differently.

createRelationship

public final POIXMLDocumentPart createRelationship(POIXMLRelation descriptor,
                                                   POIXMLFactory factory)

Create a new child POIXMLDocumentPart

Parameters:

descriptor - the part descriptor

factory - the factory that will create an instance of the requested relation

Returns:

the created child POIXMLDocumentPart

Throws:

PartAlreadyExistsException - If rule M1.12 is not verified : Packages shall not contain equivalent part names and package implementers shall neither create nor recognize packages with equivalent part names.

createRelationship

public final POIXMLDocumentPart createRelationship(POIXMLRelation descriptor,
                                                   POIXMLFactory factory,
                                                   int idx)

Create a new child POIXMLDocumentPart

Parameters:

descriptor - the part descriptor

factory - the factory that will create an instance of the requested relation

idx - part number

Returns:

the created child POIXMLDocumentPart

Throws:

PartAlreadyExistsException - If rule M1.12 is not verified : Packages shall not contain equivalent part names and package implementers shall neither create nor recognize packages with equivalent part names.

getNextPartNumber

@Internal
public final int getNextPartNumber(POIXMLRelation descriptor,
                                             int minIdx)

Identifies the next available part number for a part of the given type, if possible, otherwise -1 if none are available. The found (valid) index can then be safely given to createRelationship(POIXMLRelation, POIXMLFactory, int) or createRelationship(POIXMLRelation, POIXMLFactory, int, boolean) without naming clashes. If parts with other types are already claiming a name for this relationship type (eg a XSSFRelation.CHART using the drawing part namespace normally used by XSSFRelation.DRAWINGS), those will be considered when finding the next spare number.

Parameters:

descriptor - The relationship type to find the part number for

minIdx - The minimum free index to assign, use -1 for any

Returns:

The next free part number, or -1 if none available

Throws:

POIXMLException - if the format is invalid

createRelationship

public final POIXMLDocumentPart.RelationPart createRelationship(POIXMLRelation descriptor,
                                                                POIXMLFactory factory,
                                                                int idx,
                                                                boolean noRelation)

Create a new child POIXMLDocumentPart

Parameters:

descriptor - the part descriptor

factory - the factory that will create an instance of the requested relation

idx - part number

noRelation - if true, then no relationship is added.

Returns:

the created child POIXMLDocumentPart

Throws:

PartAlreadyExistsException - If rule M1.12 is not verified : Packages shall not contain equivalent part names and package implementers shall neither create nor recognize packages with equivalent part names.

read

protected void read(POIXMLFactory factory,
                    Map<PackagePart,POIXMLDocumentPart> context)
             throws OpenXML4JException

Iterate through the underlying PackagePart and create child POIXMLFactory instances using the specified factory

Parameters:

factory - the factory object that creates POIXMLFactory instances

context - context map containing already visited noted keyed by targetURI

Throws:

OpenXML4JException - thrown when a related part can't be read

getTargetPart

protected PackagePart getTargetPart(PackageRelationship rel)
                             throws InvalidFormatException

Get the PackagePart that is the target of a relationship from this Part.

Parameters:

rel - The relationship

Returns:

The target part

Throws:

InvalidFormatException - thrown if the related part has is erroneous

onDocumentCreate

protected void onDocumentCreate()
                         throws IOException

Fired when a new package part is created

Throws:

IOException - a subclass may throw an IOException on document creation

onDocumentRead

protected void onDocumentRead()
                       throws IOException

Fired when a package part is read

Throws:

IOException - a subclass may throw an IOException when a document is read

onDocumentRemove

protected void onDocumentRemove()
                         throws IOException

Fired when a package part is about to be removed from the package

Throws:

IOException - a subclass may throw an IOException when a document is removed

_invokeOnDocumentRead

@Internal
 @Deprecated
public static void _invokeOnDocumentRead(POIXMLDocumentPart part)
                                                         throws IOException

Deprecated. This method only exists to allow access to protected onDocumentRead() from XWPFDocument without reflection. It should be removed.

Internal method, do not use!

Parameters:

part - the part which is to be read

Throws:

IOException - if the part can't be read