org.oclc.da.gdfr.registryprototype.pvt.dbxml
Class XPathEvaluator

java.lang.Object
  org.oclc.da.gdfr.registryprototype.pvt.dbxml.XPathEvaluator

public class XPathEvaluator
extends java.lang.Object

Constructor Summary

XPathEvaluator(java.lang.String xml)

Method Summary

java.lang.String	addComplexValueToContent(java.lang.String content, java.lang.String path, java.lang.String value) Appends a new complex value to the node at the given path
void	addNamespaces(java.lang.String xml) Adds any new namespaces found in the given xml to this objects properties
java.lang.String	addSimpleValueToContent(java.lang.String content, java.lang.String path, java.lang.String value) Appends a simple value to the given XML
java.lang.String	addTextValueToContent(java.lang.String content, java.lang.String path, java.lang.String value) Adds/Updates a text node with the given value at the given path
com.sleepycat.dbxml.XmlQueryContext	createQueryContext(com.sleepycat.dbxml.XmlQueryContext qContext) Puts all known namespace prefix/uri pairs into an XmlQueryContext Object
java.lang.String[]	findValueInContent(java.lang.String content, java.lang.String path) Finds a value in an Xml String and returns it
java.lang.String	getNamespaceFromPrefix(java.lang.String prefix) Returns the namespace URI for the given Prefix
java.lang.String	removeValueFromContent(java.lang.String content, java.lang.String path, boolean removeElem) Removes a text value from the given content

Methods inherited from class java.lang.Object

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

Constructor Detail

XPathEvaluator

public XPathEvaluator(java.lang.String xml)

Method Detail

addNamespaces

public void addNamespaces(java.lang.String xml)

Adds any new namespaces found in the given xml to this objects properties

Parameters:

xml -

addComplexValueToContent

public java.lang.String addComplexValueToContent(java.lang.String content,
                                                 java.lang.String path,
                                                 java.lang.String value)

Appends a new complex value to the node at the given path

Parameters:

content - The original XML document

path - The XPath to follow

value - The new value to add.

Returns:

String representing the new XML with value added at path

Throws:

RegistryException

addSimpleValueToContent

public java.lang.String addSimpleValueToContent(java.lang.String content,
                                                java.lang.String path,
                                                java.lang.String value)

Appends a simple value to the given XML

Parameters:

content - The XML to add to. Note, this MUST contain the node that is addressed by the XPath provided

path - The XPath to reach the element

value - The value to assign. This should NOT contain the element that is directly referred to by the XPath

Returns:

The updated XML

addTextValueToContent

public java.lang.String addTextValueToContent(java.lang.String content,
                                              java.lang.String path,
                                              java.lang.String value)

Adds/Updates a text node with the given value at the given path

Parameters:

content - String representing the XML document

path - The XPath leading to the simple element containing the text node

value - The text value to add

createQueryContext

public com.sleepycat.dbxml.XmlQueryContext createQueryContext(com.sleepycat.dbxml.XmlQueryContext qContext)

Puts all known namespace prefix/uri pairs into an XmlQueryContext Object

Parameters:

qContext -

Returns:

XmlQueryContext poplulated with all known namespace prefix/uri pairs

findValueInContent

public java.lang.String[] findValueInContent(java.lang.String content,
                                             java.lang.String path)

Finds a value in an Xml String and returns it

Parameters:

content - The Xml String to look at

path - The XPath expression to the location of the value

Returns:

The value found by the given path in the given content

Throws:

javax.xml.xpath.XPathExpressionException - If the XPath is invalid

getNamespaceFromPrefix

public java.lang.String getNamespaceFromPrefix(java.lang.String prefix)

Returns the namespace URI for the given Prefix

Parameters:

prefix -

Returns:

removeValueFromContent

public java.lang.String removeValueFromContent(java.lang.String content,
                                               java.lang.String path,
                                               boolean removeElem)

Removes a text value from the given content

Parameters:

content - The XML document to use

path - The XPath to reach the text to remove

removeElem - If true, element and contents are removed. If false, only contents are erased.

Returns:

The XML document with specified text element removed