AttributesImpl

public class AttributesImpl extends Object
implements Attributes
Known Direct Subclasses

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 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 startElement event; or
  2. to construct or modify an Attributes object in a SAX2 driver or filter.

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

Public Constructor Summary

AttributesImpl()
Construct a new, empty AttributesImpl object.
AttributesImpl(Attributes atts)
Copy an existing Attributes object.

Public Method Summary

void
addAttribute(String uri, String localName, String qName, String type, String value)
Add an attribute to the end of the list.
void
clear()
Clear the attribute list for reuse.
int
getIndex(String qName)
Look up an attribute's index by qualified (prefixed) name.
int
getIndex(String uri, String localName)
Look up an attribute's index by Namespace name.
int
getLength()
Return the number of attributes in the list.
String
getLocalName(int index)
Return an attribute's local name.
String
getQName(int index)
Return an attribute's qualified (prefixed) name.
String
getType(String qName)
Look up an attribute's type by qualified (prefixed) name.
String
getType(int index)
Return an attribute's type by index.
String
getType(String uri, String localName)
Look up an attribute's type by Namespace-qualified name.
String
getURI(int index)
Return an attribute's Namespace URI.
String
getValue(String qName)
Look up an attribute's value by qualified (prefixed) name.
String
getValue(String uri, String localName)
Look up an attribute's value by Namespace-qualified name.
String
getValue(int index)
Return an attribute's value by index.
void
removeAttribute(int index)
Remove an attribute from the list.
void
setAttribute(int index, String uri, String localName, String qName, String type, String value)
Set an attribute in the list.
void
setAttributes(Attributes atts)
Copy an entire Attributes object.
void
setLocalName(int index, String localName)
Set the local name of a specific attribute.
void
setQName(int index, String qName)
Set the qualified name of a specific attribute.
void
setType(int index, String type)
Set the type of a specific attribute.
void
setURI(int index, String uri)
Set the Namespace URI of a specific attribute.
void
setValue(int index, String value)
Set the value of a specific attribute.

Inherited Method Summary

Public Constructors

public AttributesImpl ()

Construct a new, empty AttributesImpl object.

public AttributesImpl (Attributes atts)

Copy an existing Attributes object.

This constructor is especially useful inside a startElement event.

Parameters
atts The existing Attributes object.

Public Methods

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.

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.

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.

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.

public int getLength ()

Return the number of attributes in the list.

Returns
  • The number of attributes in the list.
See Also

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.

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

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.

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

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.

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

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.

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.

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

public void removeAttribute (int index)

Remove an attribute from the list.

Parameters
index The index of the attribute (zero-based).
Throws
ArrayIndexOutOfBoundsException When the supplied index does not point to an attribute in the list.

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

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.

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

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

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

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

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