org.plasma.sdo.xpath
Class DataGraphNavigator

java.lang.Object
  org.jaxen.DefaultNavigator
      org.plasma.sdo.xpath.DataGraphNavigator

All Implemented Interfaces:

Serializable, org.jaxen.NamedAccessNavigator, org.jaxen.Navigator

public class DataGraphNavigator
extends org.jaxen.DefaultNavigator
implements org.jaxen.NamedAccessNavigator

Supports navigation of an SDO data graph by the Jaxen XPATH engine.

This class is not intended for direct usage, but is used by the Jaxen engine during evaluation. Use DataGraphXPath to parse an XPath against a data graph.

See Also:

XPath, DataGraph, Serialized Form

Constructor Summary

DataGraphNavigator()

Method Summary

Iterator	getAttributeAxisIterator(Object contextNode)
Iterator	getAttributeAxisIterator(Object contextNode, String localName, String namespacePrefix, String namespaceURI) Retrieves an Iterator over the attribute elements that match the supplied name.
String	getAttributeName(Object obj)
String	getAttributeNamespaceUri(Object obj)
String	getAttributeQName(Object obj)
String	getAttributeStringValue(Object obj)
Iterator	getChildAxisIterator(Object contextNode) Where the given context node is a SDO Property, gets the actual value of the property wrapped in a CoreXPathValue and Iterator.
Iterator	getChildAxisIterator(Object contextNode, String localName, String namespacePrefix, String namespaceURI) Retrieves an Iterator over the child elements that match the supplied local name and namespace URI.
String	getCommentStringValue(Object obj)
Object	getDocument(String url)
Object	getDocumentNode(Object contextNode)
String	getElementName(Object obj)
String	getElementNamespaceUri(Object obj)
String	getElementQName(Object obj)
String	getElementStringValue(Object obj)
Iterator	getNamespaceAxisIterator(Object contextNode)
String	getNamespacePrefix(Object obj)
String	getNamespaceStringValue(Object obj)
Iterator	getParentAxisIterator(Object contextNode)
String	getProcessingInstructionData(Object obj)
String	getProcessingInstructionTarget(Object obj)
String	getTextStringValue(Object obj)
boolean	isAttribute(Object obj)
boolean	isComment(Object obj)
boolean	isDocument(Object obj)
boolean	isElement(Object obj)
boolean	isNamespace(Object obj)
boolean	isProcessingInstruction(Object obj)
boolean	isText(Object obj)
org.jaxen.XPath	parseXPath(String xpath) Returns a parsed form of the given XPath string, which will be suitable for queries on Data Graph documents.
String	translateNamespacePrefixToUri(String prefix, Object context)

Methods inherited from class org.jaxen.DefaultNavigator

getAncestorAxisIterator, getAncestorOrSelfAxisIterator, getDescendantAxisIterator, getDescendantOrSelfAxisIterator, getElementById, getFollowingAxisIterator, getFollowingSiblingAxisIterator, getNodeType, getParentNode, getPrecedingAxisIterator, getPrecedingSiblingAxisIterator, getSelfAxisIterator

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jaxen.Navigator

getAncestorAxisIterator, getAncestorOrSelfAxisIterator, getDescendantAxisIterator, getDescendantOrSelfAxisIterator, getElementById, getFollowingAxisIterator, getFollowingSiblingAxisIterator, getNodeType, getParentNode, getPrecedingAxisIterator, getPrecedingSiblingAxisIterator, getSelfAxisIterator

Constructor Detail

DataGraphNavigator

public DataGraphNavigator()

Method Detail

isElement

public boolean isElement(Object obj)

Specified by:

isElement in interface org.jaxen.Navigator

isComment

public boolean isComment(Object obj)

Specified by:

isComment in interface org.jaxen.Navigator

isText

public boolean isText(Object obj)

Specified by:

isText in interface org.jaxen.Navigator

isAttribute

public boolean isAttribute(Object obj)

Specified by:

isAttribute in interface org.jaxen.Navigator

isProcessingInstruction

public boolean isProcessingInstruction(Object obj)

Specified by:

isProcessingInstruction in interface org.jaxen.Navigator

isDocument

public boolean isDocument(Object obj)

Specified by:

isDocument in interface org.jaxen.Navigator

isNamespace

public boolean isNamespace(Object obj)

Specified by:

isNamespace in interface org.jaxen.Navigator

getElementName

public String getElementName(Object obj)

Specified by:

getElementName in interface org.jaxen.Navigator

getElementNamespaceUri

public String getElementNamespaceUri(Object obj)

Specified by:

getElementNamespaceUri in interface org.jaxen.Navigator

getAttributeName

public String getAttributeName(Object obj)

Specified by:

getAttributeName in interface org.jaxen.Navigator

getAttributeNamespaceUri

public String getAttributeNamespaceUri(Object obj)

Specified by:

getAttributeNamespaceUri in interface org.jaxen.Navigator

getChildAxisIterator

public Iterator getChildAxisIterator(Object contextNode)

Where the given context node is a SDO Property, gets the actual value of the property wrapped in a CoreXPathValue and Iterator. This wrapper approach supports subsequent navigator tests for isText() where we want any Data Object value to be thought of as XML text and be returned. In particular we want null values to be returned so that clients can at least detect if the XPath was navigated successfully.

Specified by:

getChildAxisIterator in interface org.jaxen.Navigator

Overrides:

getChildAxisIterator in class org.jaxen.DefaultNavigator

Parameters:

contextNode - the context node

See Also:

CoreXPathResult, DefaultNavigator.getChildAxisIterator(java.lang.Object)

getChildAxisIterator

public Iterator getChildAxisIterator(Object contextNode,
                                     String localName,
                                     String namespacePrefix,
                                     String namespaceURI)

Retrieves an Iterator over the child elements that match the supplied local name and namespace URI.

Specified by:

getChildAxisIterator in interface org.jaxen.NamedAccessNavigator

Parameters:

contextNode - the origin context node

localName - the local name of the children to return, always present

namespacePrefix - ignored; prefixes are not used when matching in XPath

namespaceURI - the URI of the namespace of the children to return

Returns:

an Iterator that traverses the named children, or null if none

getNamespaceAxisIterator

public Iterator getNamespaceAxisIterator(Object contextNode)

Specified by:

getNamespaceAxisIterator in interface org.jaxen.Navigator

Overrides:

getNamespaceAxisIterator in class org.jaxen.DefaultNavigator

getParentAxisIterator

public Iterator getParentAxisIterator(Object contextNode)

Specified by:

getParentAxisIterator in interface org.jaxen.Navigator

Overrides:

getParentAxisIterator in class org.jaxen.DefaultNavigator

getAttributeAxisIterator

public Iterator getAttributeAxisIterator(Object contextNode)

Specified by:

getAttributeAxisIterator in interface org.jaxen.Navigator

Overrides:

getAttributeAxisIterator in class org.jaxen.DefaultNavigator

getAttributeAxisIterator

public Iterator getAttributeAxisIterator(Object contextNode,
                                         String localName,
                                         String namespacePrefix,
                                         String namespaceURI)

Retrieves an Iterator over the attribute elements that match the supplied name.

Specified by:

getAttributeAxisIterator in interface org.jaxen.NamedAccessNavigator

Parameters:

contextNode - the origin context node

localName - the local name of the attributes to return, always present

namespacePrefix - the prefix of the namespace of the attributes to return

namespaceURI - the URI of the namespace of the attributes to return

Returns:

an Iterator that traverses the named attributes, not null

parseXPath

public org.jaxen.XPath parseXPath(String xpath)
                           throws org.jaxen.saxpath.SAXPathException

Returns a parsed form of the given XPath string, which will be suitable for queries on Data Graph documents.

Specified by:

parseXPath in interface org.jaxen.Navigator

Throws:

org.jaxen.saxpath.SAXPathException

getDocumentNode

public Object getDocumentNode(Object contextNode)

Specified by:

getDocumentNode in interface org.jaxen.Navigator

Overrides:

getDocumentNode in class org.jaxen.DefaultNavigator

getElementQName

public String getElementQName(Object obj)

Specified by:

getElementQName in interface org.jaxen.Navigator

getAttributeQName

public String getAttributeQName(Object obj)

Specified by:

getAttributeQName in interface org.jaxen.Navigator

getNamespaceStringValue

public String getNamespaceStringValue(Object obj)

Specified by:

getNamespaceStringValue in interface org.jaxen.Navigator

getNamespacePrefix

public String getNamespacePrefix(Object obj)

Specified by:

getNamespacePrefix in interface org.jaxen.Navigator

getTextStringValue

public String getTextStringValue(Object obj)

Specified by:

getTextStringValue in interface org.jaxen.Navigator

getAttributeStringValue

public String getAttributeStringValue(Object obj)

Specified by:

getAttributeStringValue in interface org.jaxen.Navigator

getElementStringValue

public String getElementStringValue(Object obj)

Specified by:

getElementStringValue in interface org.jaxen.Navigator

getProcessingInstructionTarget

public String getProcessingInstructionTarget(Object obj)

Specified by:

getProcessingInstructionTarget in interface org.jaxen.Navigator

Overrides:

getProcessingInstructionTarget in class org.jaxen.DefaultNavigator

getProcessingInstructionData

public String getProcessingInstructionData(Object obj)

Specified by:

getProcessingInstructionData in interface org.jaxen.Navigator

Overrides:

getProcessingInstructionData in class org.jaxen.DefaultNavigator

getCommentStringValue

public String getCommentStringValue(Object obj)

Specified by:

getCommentStringValue in interface org.jaxen.Navigator

translateNamespacePrefixToUri

public String translateNamespacePrefixToUri(String prefix,
                                            Object context)

Specified by:

translateNamespacePrefixToUri in interface org.jaxen.Navigator

Overrides:

translateNamespacePrefixToUri in class org.jaxen.DefaultNavigator

getDocument

public Object getDocument(String url)
                   throws org.jaxen.FunctionCallException

Specified by:

getDocument in interface org.jaxen.Navigator

Overrides:

getDocument in class org.jaxen.DefaultNavigator

Throws:

org.jaxen.FunctionCallException