net.sf.saxon.tree.util
Class NamespaceDeclarationsImpl

java.lang.Object
  net.sf.saxon.tree.util.NamespaceDeclarationsImpl

All Implemented Interfaces:

NamespaceDeclarations

public class NamespaceDeclarationsImpl
extends Object
implements NamespaceDeclarations

An implementation of the NamespaceDeclarations interface, based on encapsulating an array of namespace codes.

Constructor Summary

NamespaceDeclarationsImpl()
Create an uninitialized instance

NamespaceDeclarationsImpl(NamePool pool, int[] codes)
Construct a set of namespace declarations

Method Summary

int	getNamespaceCode(int index) Get the n'th declaration in the list in the form of a namespace code.
int[]	getNamespaceCodes(int[] buffer) Get all the namespace codes, as an array.
int	getNumberOfNamespaces() Get the number of declarations (and undeclarations) in this list.
String	getPrefix(int index) Get the prefix of the n'th declaration (or undeclaration) in the list, counting from zero.
String	getURI(int index) Get the namespace URI of the n'th declaration (or undeclaration) in the list, counting from zero.
void	setNamePool(NamePool pool) Set the name pool
void	setNamespaceCodes(int[] codes) Set the namespace codes.

Methods inherited from class java.lang.Object

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

Constructor Detail

NamespaceDeclarationsImpl

public NamespaceDeclarationsImpl()

Create an uninitialized instance

NamespaceDeclarationsImpl

public NamespaceDeclarationsImpl(NamePool pool,
                                 int[] codes)

Construct a set of namespace declarations

Parameters:

pool - the name pool

codes - an integer array holding the namespace codes. These codes are allocated by the name pool, and can be used to look up a prefix and uri in the name pool. If the array contains the integer -1, this acts as a terminator for the list. This is the format returned by the method NodeInfo.getDeclaredNamespaces(int[]). A value of null is equivalent to supplying an empty array.

Method Detail

setNamePool

public void setNamePool(NamePool pool)

Set the name pool

Parameters:

pool - the NamePool

setNamespaceCodes

public void setNamespaceCodes(int[] codes)

Set the namespace codes.

Parameters:

codes - an integer array holding the namespace codes. These codes are allocated by the name pool, and can be used to look up a prefix and uri in the name pool. If the array contains the integer -1, this acts as a terminator for the list. This is the format returned by the method NodeInfo.getDeclaredNamespaces(int[]). A value of null is equivalent to supplying an empty array.

getNamespaceCodes

public int[] getNamespaceCodes(int[] buffer)

Get all the namespace codes, as an array.

Specified by:

getNamespaceCodes in interface NamespaceDeclarations

Parameters:

buffer - a sacrificial array that the method is free to use to contain the result. May be null.

Returns:

an integer array containing namespace codes. The array may be filled completely with namespace codes, or it may be incompletely filled, in which case a -1 integer acts as a terminator.

getNumberOfNamespaces

public int getNumberOfNamespaces()

Get the number of declarations (and undeclarations) in this list.

Specified by:

getNumberOfNamespaces in interface NamespaceDeclarations

getPrefix

public String getPrefix(int index)

Get the prefix of the n'th declaration (or undeclaration) in the list, counting from zero.

Specified by:

getPrefix in interface NamespaceDeclarations

Parameters:

index - the index identifying which declaration is required.

Returns:

the namespace prefix. For a declaration or undeclaration of the default namespace, this is the zero-length string.

Throws:

IndexOutOfBoundsException - if the index is out of range.

getURI

public String getURI(int index)

Get the namespace URI of the n'th declaration (or undeclaration) in the list, counting from zero.

Specified by:

getURI in interface NamespaceDeclarations

Parameters:

index - the index identifying which declaration is required.

Returns:

the namespace URI. For a namespace undeclaration, this is the zero-length string.

Throws:

IndexOutOfBoundsException - if the index is out of range.

getNamespaceCode

public int getNamespaceCode(int index)

Get the n'th declaration in the list in the form of a namespace code. Namespace codes can be translated into a prefix and URI by means of methods in the NamePool

Specified by:

getNamespaceCode in interface NamespaceDeclarations

Parameters:

index - the index identifying which declaration is required.

Returns:

the namespace code. This is an integer whose upper half indicates the prefix (0 represents the default namespace), and whose lower half indicates the URI (0 represents an undeclaration).

Throws:

IndexOutOfBoundsException - if the index is out of range.

See Also:

NamePool.getPrefixFromNamespaceCode(int), NamePool.getURIFromNamespaceCode(int)