org.deegree.ogcwebservices.wfs.operation
Class GetFeature

java.lang.Object
  org.deegree.ogcwebservices.AbstractOGCWebServiceRequest
      org.deegree.ogcwebservices.wfs.operation.AbstractWFSRequest
          org.deegree.ogcwebservices.wfs.operation.GetFeature

All Implemented Interfaces:

Serializable, OGCWebServiceRequest

Direct Known Subclasses:

AugmentableGetFeature, GetFeatureWithLock

public class GetFeature
extends AbstractWFSRequest

Represents a GetFeature request to a web feature service.

The GetFeature operation allows the retrieval of features from a web feature service. A GetFeature request is processed by a WFS and when the value of the outputFormat attribute is set to text/gml; subtype=gml/3.1.1, a GML instance document, containing the result set, is returned to the client.

Version:

$Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Andreas Poth , Markus Schneider, last edited by: $Author: mschneider $

See Also:

Serialized Form

Nested Class Summary

static class

GetFeature.RESULT_TYPE Known result types.

Field Summary

static String	FORMAT_FEATURECOLLECTION Serialized java object format (deegree specific extension) *
protected int	maxFeatures
protected String	outputFormat
protected List<Query>	queries
protected GetFeature.RESULT_TYPE	resultType
protected int	startPosition

Fields inherited from class org.deegree.ogcwebservices.wfs.operation.AbstractWFSRequest

FORMAT_GML2, FORMAT_GML2_WFS100, FORMAT_GML3, FORMAT_XML

Constructor Summary

protected	GetFeature() Creates an uninitialized GetFeature instance.
(package private)	GetFeature(String version, String id, String handle, GetFeature.RESULT_TYPE resultType, String outputFormat, int maxFeatures, int startPosition, int traverseXLinkDepth, int traverseXLinkExpiry, Query[] queries, Map<String,String> vendorSpecificParam) Creates a new GetFeature instance.

Method Summary

static GetFeature	create(Map<String,String> kvp) Creates a new GetFeature request from the given map.
static GetFeature	create(String id, Element root) Creates a new GetFeature instance from a document that contains the DOM representation of the request.
static GetFeature	create(String id, String request) Creates a new GetFeature instance from the given key-value pair encoded request.
static GetFeature	create(String version, String id, GetFeature.RESULT_TYPE resultType, String outputFormat, String handle, int maxFeatures, int startPosition, int traverseXLinkDepth, int traverseXLinkExpiry, Query[] queries) Creates a new GetFeature instance from the given parameters.
protected static Map<QualifiedName,PropertyPath[]>	extractPropNames(Map<String,String> kvp, QualifiedName[] typeNames) Extracts the PROPERTYNAME parameter and assigns them to the requested type names.
int	getMaxFeatures() The optional maxFeatures attribute can be used to limit the number of features that a GetFeature request retrieves.
String	getOutputFormat() Returns the output format.
Query[]	getQuery() The query defines which feature type to query, what properties to retrieve and what constraints (spatial and non-spatial) to apply to those properties.
GetFeature.RESULT_TYPE	getResultType() Returns the desired result type of the GetFeature operation.
int	getStartPosition() The startPosition parameter identifies the first result set entry to be returned specified the default is the first record.
int	getTraverseXLinkDepth() The optional traverseXLinkDepth attribute indicates the depth to which nested property XLink linking element locator attribute (href) XLinks in all properties of the selected feature(s) are traversed and resolved if possible.
int	getTraverseXLinkExpiry() The traverseXLinkExpiry attribute is specified in minutes.
void	guessAllMissingNamespaces(WFService wfs) Adds missing namespaces to requested feature type names, property names, filter properties and sort properties.
void	guessMissingTypeNameNamespaces(WFService wfs) Adds missing namespaces in the names of requested feature types.
void	setMaxFeatures(int max)
void	setQueries(Query[] query) sets the
String	toString()

Methods inherited from class org.deegree.ogcwebservices.wfs.operation.AbstractWFSRequest

checkServiceParameter, checkVersionParameter, extractBBOXFilter, extractFilters, extractNamespaceParameter, extractTypeNames, getHandle, getServiceName

Methods inherited from class org.deegree.ogcwebservices.AbstractOGCWebServiceRequest

getId, getParam, getParamAsInt, getParamValues, getRequestParameter, getRequiredParam, getVendorSpecificParameter, getVendorSpecificParameters, getVersion

Methods inherited from class java.lang.Object

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

Field Detail

FORMAT_FEATURECOLLECTION

public static final String FORMAT_FEATURECOLLECTION

Serialized java object format (deegree specific extension) *

See Also:

Constant Field Values

resultType

protected GetFeature.RESULT_TYPE resultType

outputFormat

protected String outputFormat

maxFeatures

protected int maxFeatures

queries

protected List<Query> queries

startPosition

protected int startPosition

Constructor Detail

GetFeature

GetFeature(String version,
           String id,
           String handle,
           GetFeature.RESULT_TYPE resultType,
           String outputFormat,
           int maxFeatures,
           int startPosition,
           int traverseXLinkDepth,
           int traverseXLinkExpiry,
           Query[] queries,
           Map<String,String> vendorSpecificParam)

Creates a new GetFeature instance.

Parameters:

version - request version

id - id of the request

handle -

resultType - desired result type (results | hits)

outputFormat - requested result format

maxFeatures -

startPosition - deegree specific parameter defining where to start considering features

traverseXLinkDepth - indicates the depth to which nested property XLink linking element locator attribute (href) XLinks are traversed and resolved if possible (not implemented yet, use -1 as default)

traverseXLinkExpiry - indicates how long a Web Feature Service should wait to receive a response to a nested GetGmlObject request (not implemented yet, use 0 as default)

queries -

vendorSpecificParam -

GetFeature

protected GetFeature()

Creates an uninitialized GetFeature instance.

Method Detail

create

public static GetFeature create(String version,
                                String id,
                                GetFeature.RESULT_TYPE resultType,
                                String outputFormat,
                                String handle,
                                int maxFeatures,
                                int startPosition,
                                int traverseXLinkDepth,
                                int traverseXLinkExpiry,
                                Query[] queries)

Creates a new GetFeature instance from the given parameters.

Parameters:

version - request version

id - id of the request

resultType - desired result type (results | hits)

outputFormat - requested result format

handle -

maxFeatures - default = -1 (all features)

startPosition - default = 0 (starting at the first feature)

traverseXLinkDepth -

traverseXLinkExpiry -

queries - a set of Query objects that describes the query to perform

Returns:

new GetFeature request

create

public static GetFeature create(String id,
                                Element root)
                         throws OGCWebServiceException

Creates a new GetFeature instance from a document that contains the DOM representation of the request.

Parameters:

id - of the request

root - element that contains the DOM representation of the request

Returns:

new GetFeature request

Throws:

OGCWebServiceException

create

public static GetFeature create(String id,
                                String request)
                         throws InconsistentRequestException,
                                InvalidParameterValueException,
                                MissingParameterValueException

Creates a new GetFeature instance from the given key-value pair encoded request.

Parameters:

id - request identifier

request -

Returns:

new GetFeature request

Throws:

InvalidParameterValueException

InconsistentRequestException

MissingParameterValueException

create

public static GetFeature create(Map<String,String> kvp)
                         throws InconsistentRequestException,
                                InvalidParameterValueException,
                                MissingParameterValueException

Creates a new GetFeature request from the given map.

Parameters:

kvp - key-value pairs, keys have to be uppercase

Returns:

new GetFeature request

Throws:

InvalidParameterValueException

InconsistentRequestException

MissingParameterValueException

extractPropNames

protected static Map<QualifiedName,PropertyPath[]> extractPropNames(Map<String,String> kvp,
                                                                    QualifiedName[] typeNames)
                                                             throws InvalidParameterValueException

Extracts the PROPERTYNAME parameter and assigns them to the requested type names.

Parameters:

kvp -

typeNames -

Returns:

map with the assignments of type names to property names

Throws:

InvalidParameterValueException

getOutputFormat

public String getOutputFormat()

Returns the output format.

The outputFormat attribute defines the format to use to generate the result set. Vendor specific formats, declared in the capabilities document are possible. The WFS-specs implies GML as default output format.

Returns:

the output format.

getQuery

public Query[] getQuery()

The query defines which feature type to query, what properties to retrieve and what constraints (spatial and non-spatial) to apply to those properties.

only used for xml-coded requests

Returns:

contained queries

setQueries

public void setQueries(Query[] query)

sets the

Parameters:

query -

getMaxFeatures

public int getMaxFeatures()

The optional maxFeatures attribute can be used to limit the number of features that a GetFeature request retrieves. Once the maxFeatures limit is reached, the result set is truncated at that point. If not limit is set -1 will be returned.

Returns:

number of feature to fetch, -1 if no limit is set

setMaxFeatures

public void setMaxFeatures(int max)

Parameters:

max -

See Also:

getMaxFeatures()

getStartPosition

public int getStartPosition()

The startPosition parameter identifies the first result set entry to be returned specified the default is the first record. If not startposition is set 0 will be returned

Returns:

the first result set entry to be returned

getResultType

public GetFeature.RESULT_TYPE getResultType()

Returns the desired result type of the GetFeature operation. Possible values are 'results' and 'hits'.

Returns:

the desired result type

getTraverseXLinkDepth

public int getTraverseXLinkDepth()

The optional traverseXLinkDepth attribute indicates the depth to which nested property XLink linking element locator attribute (href) XLinks in all properties of the selected feature(s) are traversed and resolved if possible. A value of "1" indicates that one linking element locator attribute (href) XLink will be traversed and the referenced element returned if possible, but nested property XLink linking element locator attribute (href) XLinks in the returned element are not traversed. A value of "*" indicates that all nested property XLink linking element locator attribute (href) XLinks will be traversed and the referenced elements returned if possible. The range of valid values for this attribute consists of positive integers plus "*".

Returns:

the depth to which nested property XLinks are traversed and resolved

getTraverseXLinkExpiry

public int getTraverseXLinkExpiry()

The traverseXLinkExpiry attribute is specified in minutes. It indicates how long a Web Feature Service should wait to receive a response to a nested GetGmlObject request. If no traverseXLinkExpiry attribute is present for a GetGmlObject request, the WFS wait time is implementation dependent.

Returns:

how long to wait to receive a response to a nested GetGmlObject request

guessMissingTypeNameNamespaces

public void guessMissingTypeNameNamespaces(WFService wfs)

Adds missing namespaces in the names of requested feature types.

If the QualifiedName of a requested type has a null namespace, the first qualified feature type name of the given WFService with the same local name is used instead.

Note: The method changes this request (the feature type names) and should only be called by the WFSHandler class.

Parameters:

wfs - WFService instance that is used for the lookup of proper (qualified) feature type names

guessAllMissingNamespaces

public void guessAllMissingNamespaces(WFService wfs)

Adds missing namespaces to requested feature type names, property names, filter properties and sort properties.

Note: The method changes the request and should only be called by the WFSHandler class.

Parameters:

wfs - WFService instance that is used for the lookup of proper (qualified) feature and property names

toString

public String toString()

Overrides:

toString in class AbstractOGCWebServiceRequest