org.ccil.cowan.tagsoup

Class AttributesImpl

public class AttributesImpl extends Object implements Attributes

Default implementation of the Attributes interface.
This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY. See http://www.saxproject.org for further information.

This class provides a default implementation of the SAX2 org.xml.sax.Attributes Attributes 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 a org.xml.sax.ContentHandler#startElement startElement event; or
  2. to construct or modify an Attributes object in a SAX2 driver or filter.

This class replaces the now-deprecated SAX1 org.xml.sax.helpers.AttributeListImpl AttributeListImpl class; in addition to supporting the updated Attributes interface rather than the deprecated org.xml.sax.AttributeList AttributeList interface, it also includes a much more efficient implementation using a single array rather than a set of Vectors.

Since: SAX 2.0

Version: 2.0.1 (sax2r2)

Author: David Megginson

Constructor Summary
AttributesImpl()
Construct a new, empty AttributesImpl object.
AttributesImpl(Attributes atts)
Copy an existing Attributes object.
Method Summary
voidaddAttribute(String uri, String localName, String qName, String type, String value)
Add an attribute to the end of the list.
voidclear()
Clear the attribute list for reuse.
intgetIndex(String uri, String localName)
Look up an attribute's index by Namespace name.
intgetIndex(String qName)
Look up an attribute's index by qualified (prefixed) name.
intgetLength()
Return the number of attributes in the list.
StringgetLocalName(int index)
Return an attribute's local name.
StringgetQName(int index)
Return an attribute's qualified (prefixed) name.
StringgetType(int index)
Return an attribute's type by index.
StringgetType(String uri, String localName)
Look up an attribute's type by Namespace-qualified name.
StringgetType(String qName)
Look up an attribute's type by qualified (prefixed) name.
StringgetURI(int index)
Return an attribute's Namespace URI.
StringgetValue(int index)
Return an attribute's value by index.
StringgetValue(String uri, String localName)
Look up an attribute's value by Namespace-qualified name.
StringgetValue(String qName)
Look up an attribute's value by qualified (prefixed) name.
voidremoveAttribute(int index)
Remove an attribute from the list.
voidsetAttribute(int index, String uri, String localName, String qName, String type, String value)
Set an attribute in the list.
voidsetAttributes(Attributes atts)
Copy an entire Attributes object.
voidsetLocalName(int index, String localName)
Set the local name of a specific attribute.
voidsetQName(int index, String qName)
Set the qualified name of a specific attribute.
voidsetType(int index, String type)
Set the type of a specific attribute.
voidsetURI(int index, String uri)
Set the Namespace URI of a specific attribute.
voidsetValue(int index, String value)
Set the value of a specific attribute.

Constructor Detail

AttributesImpl

public AttributesImpl()
Construct a new, empty AttributesImpl object.

AttributesImpl

public AttributesImpl(Attributes atts)
Copy an existing Attributes object.

This constructor is especially useful inside a org.xml.sax.ContentHandler#startElement startElement event.

Parameters: atts The existing Attributes object.

Method Detail

addAttribute

public void addAttribute(String uri, String localName, String qName, String type, 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.

clear

public void clear()
Clear the attribute list for reuse.

Note that little memory is freed by this call: the current array is kept so it can be reused.

getIndex

public int getIndex(String uri, 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.

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: org.xml.sax.Attributes#getIndex(java.lang.String,java.lang.String)

getIndex

public int getIndex(String qName)
Look up an attribute's index by qualified (prefixed) name.

Parameters: qName The qualified name.

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

See Also: org.xml.sax.Attributes#getIndex(java.lang.String)

getLength

public int getLength()
Return the number of attributes in the list.

Returns: The number of attributes in the list.

See Also: org.xml.sax.Attributes#getLength

getLocalName

public String getLocalName(int index)
Return an attribute's local name.

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: org.xml.sax.Attributes#getLocalName

getQName

public String getQName(int index)
Return an attribute's qualified (prefixed) name.

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: org.xml.sax.Attributes#getQName

getType

public String getType(int index)
Return an attribute's type by index.

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: org.xml.sax.Attributes#getType(int)

getType

public String getType(String uri, String localName)
Look up an attribute's type by Namespace-qualified name.

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: org.xml.sax.Attributes#getType(java.lang.String,java.lang.String)

getType

public String getType(String qName)
Look up an attribute's type by qualified (prefixed) name.

Parameters: qName The qualified name.

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

See Also: org.xml.sax.Attributes#getType(java.lang.String)

getURI

public String getURI(int index)
Return an attribute's Namespace URI.

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: org.xml.sax.Attributes#getURI

getValue

public String getValue(int index)
Return an attribute's value by index.

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

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

See Also: org.xml.sax.Attributes#getValue(int)

getValue

public String getValue(String uri, String localName)
Look up an attribute's value by Namespace-qualified name.

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: org.xml.sax.Attributes#getValue(java.lang.String,java.lang.String)

getValue

public String getValue(String qName)
Look up an attribute's value by qualified (prefixed) name.

Parameters: qName The qualified name.

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

See Also: org.xml.sax.Attributes#getValue(java.lang.String)

removeAttribute

public void removeAttribute(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.

setAttribute

public void setAttribute(int index, String uri, String localName, String qName, String type, 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.

setAttributes

public void setAttributes(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.

setLocalName

public void setLocalName(int index, 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 void setQName(int index, 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 void setType(int index, 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.

setURI

public void setURI(int index, 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.

setValue

public void setValue(int index, 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.

Licence: Academic Free License 3.0 and/or GPL 2.0