com.esri.gpt.server.csw.provider.local
Class QueryFilterParser

java.lang.Object
  com.esri.gpt.server.csw.provider.local.DiscoveryAdapter
      com.esri.gpt.server.csw.provider.local.QueryFilterParser

All Implemented Interfaces:

IFilterParser

public class QueryFilterParser
extends DiscoveryAdapter
implements IFilterParser

Parses the ogc:Filter portion of a CSW query request (GetRecords).

Constructor Summary

QueryFilterParser(OperationContext context)
Default constructor

Method Summary

void	parseFilter(OperationContext context, Node filterNode, XPath xpath) Parses the ogc:Filter node for an XML based request.
protected void	parseLogicalClause(Node parent, XPath xpath, LogicalClause logicalClause) Parses a parent node for logical, property comparison and spatial sub-clauses.
protected void	parsePropertyClause(Node parent, XPath xpath, LogicalClause logicalClause, PropertyClause propertyClause) Parses the property and literal elements underlying a comparison operator.
protected void	parseSpatialClause(Node parent, XPath xpath, LogicalClause logicalClause, SpatialClause spatialClause) Parses the spatial operand underlying a spatial operator.

Methods inherited from class com.esri.gpt.server.csw.provider.local.DiscoveryAdapter

getDiscoveryContext, parsePropertyName

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryFilterParser

public QueryFilterParser(OperationContext context)

Default constructor

Method Detail

parseFilter

public void parseFilter(OperationContext context,
                        Node filterNode,
                        XPath xpath)
                 throws OwsException,
                        XPathExpressionException

Parses the ogc:Filter node for an XML based request.

Specified by:

parseFilter in interface IFilterParser

Parameters:

context - the operation context

filterNode - the ogc:Filter node

xpath - an XPath to enable queries (properly configured with name spaces)

Throws:

OwsException - if validation fails

XPathExpressionException - if an XPath related exception occurs

parseLogicalClause

protected void parseLogicalClause(Node parent,
                                  XPath xpath,
                                  LogicalClause logicalClause)
                           throws OwsException,
                                  XPathExpressionException

Parses a parent node for logical, property comparison and spatial sub-clauses.
Any logical clauses encountered will be recursively parsed.

Parameters:

parent - the parent node from which sub-clauses will read

xpath - an XPath to enable queries (properly configured with name spaces)

logicalClause - the active logical clause to which sub-clauses will be added

Throws:

OwsException - if validation fails

XPathExpressionException - if an XPath related exception occurs

parsePropertyClause

protected void parsePropertyClause(Node parent,
                                   XPath xpath,
                                   LogicalClause logicalClause,
                                   PropertyClause propertyClause)
                            throws OwsException,
                                   XPathExpressionException

Parses the property and literal elements underlying a comparison operator.
If the resulting property clause is valid, it will be added to the clause collection of the supplied logical clause.

Parameters:

parent - the parent node (the node of the property operator)

xpath - an XPath to enable queries (properly configured with name spaces)

logicalClause - the logical clause which will contain the comparison clause

propertyClause - the populate

Throws:

OwsException - OwsException if validation fails

XPathExpressionException - if an XPath related exception occurs

parseSpatialClause

protected void parseSpatialClause(Node parent,
                                  XPath xpath,
                                  LogicalClause logicalClause,
                                  SpatialClause spatialClause)
                           throws OwsException,
                                  XPathExpressionException

Parses the spatial operand underlying a spatial operator.
The spatial operand is used to populate the bounding envelope associated with the supplied spatial clause.
If the envelope is valid, the spatial clause will be added to the clause collection of the supplied logical clause.

Parameters:

parent - the parent node (specifies the spatial operator)

xpath - an XPath to enable queries (properly configured with namespaces)

logicalClause - the logical clause which will contain the spatial clause

spatialClause - the spatial clause to populate

Throws:

OwsException - OwsException if validation fails

XPathExpressionException - if an XPath related exception occurs