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Class AttributesImpl

java.lang.Object  |  +--org.xml.sax.helpers.AttributesImpl

All Implemented Interfaces:

Attributes

public classAttributesImpl

extends java.lang.Object

implementsAttributes

Default implementation of the Attributes interface.

This module, both source code and documentation, is in the Public Domain, and comes withNO WARRANTY.

This class provides a default implementation of the SAX2Attributes interface, with the addition of manipulators so that the list can be modified or reused.

There are two typical uses of this class:

1. to take a persistent snapshot of an Attributes object in astartElement event; or
2. to construct or modify an Attributes object in a SAX2 driver or filter.

This class replaces the now-deprecated SAX1AttributeListImpl class; in addition to supporting the updated Attributes interface rather than the deprecatedAttributeList interface, it also includes a much more efficient implementation using a single array rather than a set of Vectors.

Since:

SAX 2.0

AttributesImpl

publicAttributesImpl()

Construct a new, empty AttributesImpl object.

AttributesImpl

publicAttributesImpl(Attributes atts)

Copy an existing Attributes object.

This constructor is especially useful inside astartElement event.

Parameters:

atts - The existing Attributes object.

getLength

public intgetLength()

Return the number of attributes in the list.

Specified by:

getLength in interfaceAttributes

Returns:

The number of attributes in the list.

See Also:

Attributes.getLength()

getURI

public java.lang.StringgetURI(int index)

Return an attribute's Namespace URI.

Specified by:

getURI in interfaceAttributes

Parameters:

index - The attribute's index (zero-based).

Returns:

The Namespace URI, the empty string if none is available, or null if the index is out of range.

See Also:

Attributes.getURI(int)

getLocalName

public java.lang.StringgetLocalName(int index)

Return an attribute's local name.

Specified by:

getLocalName in interfaceAttributes

Parameters:

index - The attribute's index (zero-based).

Returns:

The attribute's local name, the empty string if none is available, or null if the index if out of range.

See Also:

Attributes.getLocalName(int)

getQName

public java.lang.StringgetQName(int index)

Return an attribute's qualified (prefixed) name.

Specified by:

getQName in interfaceAttributes

Parameters:

index - The attribute's index (zero-based).

Returns:

The attribute's qualified name, the empty string if none is available, or null if the index is out of bounds.

See Also:

Attributes.getQName(int)

getType

public java.lang.StringgetType(int index)

Return an attribute's type by index.

Specified by:

getType in interfaceAttributes

Parameters:

index - The attribute's index (zero-based).

Returns:

The attribute's type, "CDATA" if the type is unknown, or null if the index is out of bounds.

See Also:

Attributes.getType(int)

getValue

public java.lang.StringgetValue(int index)

Return an attribute's value by index.

Specified by:

getValue in interfaceAttributes

Parameters:

index - The attribute's index (zero-based).

Returns:

The attribute's value or null if the index is out of bounds.

See Also:

Attributes.getValue(int)

getIndex

public intgetIndex(java.lang.String uri,                    java.lang.String localName)

Look up an attribute's index by Namespace name.

In many cases, it will be more efficient to look up the name once and use the index query methods rather than using the name query methods repeatedly.

Specified by:

getIndex in interfaceAttributes

Parameters:

uri - The attribute's Namespace URI, or the empty string if none is available.

localName - The attribute's local name.

Returns:

The attribute's index, or -1 if none matches.

See Also:

Attributes.getIndex(java.lang.String,java.lang.String)

getIndex

public intgetIndex(java.lang.String qName)

Look up an attribute's index by qualified (prefixed) name.

Specified by:

getIndex in interfaceAttributes

Parameters:

qName - The qualified name.

Returns:

The attribute's index, or -1 if none matches.

See Also:

Attributes.getIndex(java.lang.String)

getType

public java.lang.StringgetType(java.lang.String uri,                                java.lang.String localName)

Look up an attribute's type by Namespace-qualified name.

Specified by:

getType in interfaceAttributes

Parameters:

uri - The Namespace URI, or the empty string for a name with no explicit Namespace URI.

localName - The local name.

Returns:

The attribute's type, or null if there is no matching attribute.

See Also:

Attributes.getType(java.lang.String,java.lang.String)

getType

public java.lang.StringgetType(java.lang.String qName)

Look up an attribute's type by qualified (prefixed) name.

Specified by:

getType in interfaceAttributes

Parameters:

qName - The qualified name.

Returns:

The attribute's type, or null if there is no matching attribute.

See Also:

Attributes.getType(java.lang.String)

getValue

public java.lang.StringgetValue(java.lang.String uri,                                 java.lang.String localName)

Look up an attribute's value by Namespace-qualified name.

Specified by:

getValue in interfaceAttributes

Parameters:

uri - The Namespace URI, or the empty string for a name with no explicit Namespace URI.

localName - The local name.

Returns:

The attribute's value, or null if there is no matching attribute.

See Also:

Attributes.getValue(java.lang.String,java.lang.String)

getValue

public java.lang.StringgetValue(java.lang.String qName)

Look up an attribute's value by qualified (prefixed) name.

Specified by:

getValue in interfaceAttributes

Parameters:

qName - The qualified name.

Returns:

The attribute's value, or null if there is no matching attribute.

See Also:

Attributes.getValue(java.lang.String)

clear

public voidclear()

Clear the attribute list for reuse.

Note that no memory is actually freed by this call: the current arrays are kept so that they can be reused.

setAttributes

public voidsetAttributes(Attributes atts)

Copy an entire Attributes object.

It may be more efficient to reuse an existing object rather than constantly allocating new ones.

Parameters:

atts - The attributes to copy.

addAttribute

public voidaddAttribute(java.lang.String uri,                         java.lang.String localName,                         java.lang.String qName,                         java.lang.String type,                         java.lang.String value)

Add an attribute to the end of the list.

For the sake of speed, this method does no checking to see if the attribute is already in the list: that is the responsibility of the application.

Parameters:

uri - The Namespace URI, or the empty string if none is available or Namespace processing is not being performed.

localName - The local name, or the empty string if Namespace processing is not being performed.

qName - The qualified (prefixed) name, or the empty string if qualified names are not available.

type - The attribute type as a string.

value - The attribute value.

setAttribute

public voidsetAttribute(int index,                         java.lang.String uri,                         java.lang.String localName,                         java.lang.String qName,                         java.lang.String type,                         java.lang.String value)

Set an attribute in the list.

For the sake of speed, this method does no checking for name conflicts or well-formedness: such checks are the responsibility of the application.

Parameters:

index - The index of the attribute (zero-based).

uri - The Namespace URI, or the empty string if none is available or Namespace processing is not being performed.

localName - The local name, or the empty string if Namespace processing is not being performed.

qName - The qualified name, or the empty string if qualified names are not available.

type - The attribute type as a string.

value - The attribute value.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

removeAttribute

public voidremoveAttribute(int index)

Remove an attribute from the list.

Parameters:

index - The index of the attribute (zero-based).

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

setURI

public voidsetURI(int index,                   java.lang.String uri)

Set the Namespace URI of a specific attribute.

Parameters:

index - The index of the attribute (zero-based).

uri - The attribute's Namespace URI, or the empty string for none.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

setLocalName

public voidsetLocalName(int index,                         java.lang.String localName)

Set the local name of a specific attribute.

Parameters:

index - The index of the attribute (zero-based).

localName - The attribute's local name, or the empty string for none.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

setQName

public voidsetQName(int index,                     java.lang.String qName)

Set the qualified name of a specific attribute.

Parameters:

index - The index of the attribute (zero-based).

qName - The attribute's qualified name, or the empty string for none.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

setType

public voidsetType(int index,                    java.lang.String type)

Set the type of a specific attribute.

Parameters:

index - The index of the attribute (zero-based).

type - The attribute's type.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.

setValue

public voidsetValue(int index,                     java.lang.String value)

Set the value of a specific attribute.

Parameters:

index - The index of the attribute (zero-based).

value - The attribute's value.

Throws:

java.lang.ArrayIndexOutOfBoundsException - When the supplied index does not point to an attribute in the list.