org.jdom2.filter

Class ContentFilter

java.lang.Object

org.jdom2.filter.AbstractFilter<Content>

org.jdom2.filter.ContentFilter

All Implemented Interfaces:

java.io.Serializable, Filter<Content>

public class ContentFilter
extends AbstractFilter<Content>

A general purpose Filter able to represent all legal JDOM objects or a specific subset. Filtering is accomplished by way of a filtering mask in which each bit represents whether a JDOM object is visible or not. For example to view all Text and CDATA nodes in the content of element x.

      Filter filter = new ContentFilter(ContentFilter.TEXT |
                                        ContentFilter.CDATA);
      List content = x.getContent(filter);
 

For those who don't like bit-masking, set methods are provided as an alternative. For example to allow everything except Comment nodes.

      Filter filter =  new ContentFilter();
      filter.setCommentVisible(false);
      List content = x.getContent(filter);
 

The default is to allow all valid JDOM objects.

Author:

Bradley S. Huffman

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	CDATA Mask for JDOM CDATA objects
static int	COMMENT Mask for JDOM Comment objects
static int	DOCTYPE Mask for JDOM DocType object
static int	DOCUMENT Mask for JDOM Document object
static int	ELEMENT Mask for JDOM Element objects
static int	ENTITYREF Mask for JDOM EntityRef objects
static int	PI Mask for JDOM ProcessingInstruction objects
static int	TEXT Mask for JDOM Text objects

Constructor Summary

Constructors

Constructor and Description
ContentFilter() Default constructor that allows any legal JDOM objects.
ContentFilter(boolean allVisible) Set whether all JDOM objects are visible or not.
ContentFilter(int mask) Filter out JDOM objects according to a filtering mask.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj) Returns whether the two filters are equivalent (i.e. the matching mask values are identical).
Content	filter(java.lang.Object obj) Check to see if the object matches according to the filter mask.
int	getFilterMask() Return current filtering mask.
int	hashCode()
void	setCDATAVisible(boolean visible) Set visibility of CDATA objects.
void	setCommentVisible(boolean visible) Set visibility of Comment objects.
void	setDefaultMask() Set this filter to allow all legal JDOM objects.
void	setDocTypeVisible(boolean visible) Set visibility of DocType objects.
void	setDocumentContent() Set filter to match only JDOM objects that are legal document content.
void	setElementContent() Set filter to match only JDOM objects that are legal element content.
void	setElementVisible(boolean visible) Set visibility of Element objects.
void	setEntityRefVisible(boolean visible) Set visibility of EntityRef objects.
void	setFilterMask(int mask) Set filtering mask.
void	setPIVisible(boolean visible) Set visibility of ProcessingInstruction objects.
void	setTextVisible(boolean visible) Set visibility of Text objects.

Methods inherited from class org.jdom2.filter.AbstractFilter

and, filter, matches, negate, or, refine

Methods inherited from class java.lang.Object

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

Field Detail

ELEMENT

public static final int ELEMENT

Mask for JDOM Element objects

See Also:

Constant Field Values

CDATA

public static final int CDATA

Mask for JDOM CDATA objects

See Also:

Constant Field Values

TEXT

public static final int TEXT

Mask for JDOM Text objects

See Also:

Constant Field Values

COMMENT

public static final int COMMENT

Mask for JDOM Comment objects

See Also:

Constant Field Values

PI

public static final int PI

Mask for JDOM ProcessingInstruction objects

See Also:

Constant Field Values

ENTITYREF

public static final int ENTITYREF

Mask for JDOM EntityRef objects

See Also:

Constant Field Values

DOCUMENT

public static final int DOCUMENT

Mask for JDOM Document object

See Also:

Constant Field Values

DOCTYPE

public static final int DOCTYPE

Mask for JDOM DocType object

See Also:

Constant Field Values

Constructor Detail

ContentFilter

public ContentFilter()

Default constructor that allows any legal JDOM objects.

ContentFilter

public ContentFilter(boolean allVisible)

Set whether all JDOM objects are visible or not.

Parameters:

allVisible - true all JDOM objects are visible, false all JDOM objects are hidden.

ContentFilter

public ContentFilter(int mask)

Filter out JDOM objects according to a filtering mask.

Parameters:

mask - Mask of JDOM objects to allow.

Method Detail

getFilterMask

public int getFilterMask()

Return current filtering mask.

Returns:

the current filtering mask

setFilterMask

public void setFilterMask(int mask)

Set filtering mask.

Parameters:

mask - the new filtering mask

setDefaultMask

public void setDefaultMask()

Set this filter to allow all legal JDOM objects.

setDocumentContent

public void setDocumentContent()

Set filter to match only JDOM objects that are legal document content.

setElementContent

public void setElementContent()

Set filter to match only JDOM objects that are legal element content.

setElementVisible

public void setElementVisible(boolean visible)

Set visibility of Element objects.

Parameters:

visible - whether Elements are visible, true if yes, false if not

setCDATAVisible

public void setCDATAVisible(boolean visible)

Set visibility of CDATA objects.

Parameters:

visible - whether CDATA nodes are visible, true if yes, false if not

setTextVisible

public void setTextVisible(boolean visible)

Set visibility of Text objects.

Parameters:

visible - whether Text nodes are visible, true if yes, false if not

setCommentVisible

public void setCommentVisible(boolean visible)

Set visibility of Comment objects.

Parameters:

visible - whether Comments are visible, true if yes, false if not

setPIVisible

public void setPIVisible(boolean visible)

Set visibility of ProcessingInstruction objects.

Parameters:

visible - whether ProcessingInstructions are visible, true if yes, false if not

setEntityRefVisible

public void setEntityRefVisible(boolean visible)

Set visibility of EntityRef objects.

Parameters:

visible - whether EntityRefs are visible, true if yes, false if not

setDocTypeVisible

public void setDocTypeVisible(boolean visible)

Set visibility of DocType objects.

Parameters:

visible - whether the DocType is visible, true if yes, false if not

filter

public Content filter(java.lang.Object obj)

Check to see if the object matches according to the filter mask.

Parameters:

obj - The object to verify.

Returns:

true if the objected matched a predfined set of rules.

equals

public boolean equals(java.lang.Object obj)

Returns whether the two filters are equivalent (i.e. the matching mask values are identical).

Overrides:

equals in class java.lang.Object

Parameters:

obj - the object to compare against

Returns:

whether the two filters are equal

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object