org.apache.poi
Class POIXMLDocumentPart

java.lang.Object
  org.apache.poi.POIXMLDocumentPart

Direct Known Subclasses:

CalculationChain, CommentsTable, ExternalLinksTable, MapInfo, POIXMLDocument, SharedStringsTable, SingleXmlCells, StylesTable, ThemesTable, XDGFXMLDocumentPart, XSLFChart, XSLFCommentAuthors, XSLFComments, XSLFPictureData, XSLFSheet, XSLFTableStyles, XSLFTheme, XSSFChart, XSSFDrawing, XSSFPictureData, XSSFPivotCache, XSSFPivotCacheDefinition, XSSFPivotCacheRecords, XSSFPivotTable, XSSFSheet, XSSFTable, XSSFVBAPart, XSSFVMLDrawing, XWPFFootnotes, XWPFHeaderFooter, XWPFNumbering, XWPFPictureData, XWPFSettings, XWPFStyles

public class POIXMLDocumentPart
extends java.lang.Object

Represents an entry of a OOXML package.

Each POIXMLDocumentPart keeps a reference to the underlying a PackagePart.

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,
                          java.lang.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, java.util.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, java.util.Map)

POIXMLDocumentPart

public POIXMLDocumentPart(POIXMLDocumentPart parent,
                          PackagePart part)

Creates an POIXMLDocumentPart representing the given package part, relationship and parent Called by read(POIXMLFactory, java.util.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, java.util.Map)

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

java.lang.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 java.util.List<POIXMLDocumentPart> getRelations()

Returns the list of child relations for this POIXMLDocumentPart

Returns:

child relations

getRelationParts

public final java.util.List<POIXMLDocumentPart.RelationPart> getRelationParts()

Returns the list of child relations for this POIXMLDocumentPart

Returns:

child relations

getRelationById

public final POIXMLDocumentPart getRelationById(java.lang.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

getRelationId

public final java.lang.String getRelationId(POIXMLDocumentPart part)

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

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(java.lang.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.

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.

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

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 java.lang.String toString()

Overrides:

toString in class java.lang.Object

commit

protected void commit()
               throws java.io.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();
   OutputStream out = part.getOutputStream();
   XmlObject bean = getXmlBean(); //the "model" which holds changes in memory
   bean.save(out, DEFAULT_XML_OPTIONS);
   out.close();
 }
 

Throws:

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

onSave

protected final void onSave(java.util.Set<PackagePart> alreadySaved)
                     throws java.io.IOException

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

Parameters:

alreadySaved - context set containing already visited nodes

Throws:

java.io.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

protected 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

createRelationship

protected 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,
                    java.util.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 java.io.IOException

Fired when a new package part is created

Throws:

java.io.IOException - a subclass may throw an IOException on document creation

onDocumentRead

protected void onDocumentRead()
                       throws java.io.IOException

Fired when a package part is read

Throws:

java.io.IOException - a subclass may throw an IOException when a document is read

onDocumentRemove

protected void onDocumentRemove()
                         throws java.io.IOException

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

Throws:

java.io.IOException - a subclass may throw an IOException when a document is removed

_invokeOnDocumentRead

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

Deprecated. 

Internal method, do not use!

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

Parameters:

part - the part which is to be read

Throws:

java.io.IOException - if the part can't be read