Package org.geotools.data.complex

Class XmlMappingFeatureIterator

Object

AbstractMappingFeatureIterator

DataAccessMappingFeatureIterator

XmlMappingFeatureIterator

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<Feature>, IMappingFeatureIterator, FeatureIterator<Feature>

public class XmlMappingFeatureIterator
extends DataAccessMappingFeatureIterator

An implementation of AbstractMappingFeatureIterator to handle XML datasources.

Author:

Russell Petty (GeoScience Victoria), Rini Angreani (CSIRO Earth Science and Resource Engineering)

Field Summary

Fields

Modifier and Type	Field	Description
protected XmlResponse	xmlResponse
static final String	XPATH_SEPARATOR	Constants for manipulating XPath Expressions

Fields inherited from class DataAccessMappingFeatureIterator

curSrcFeature, foreignIds, mappedSource, reprojection, sourceFeatures, targetFeature

Fields inherited from class AbstractMappingFeatureIterator

attf, dataMaxFeatures, featureCounter, filterFac, ftf, GEOMETRY_FACTORY, includeMandatory, LOGGER, mapping, MULTI_VALUE_TYPE, namespaceAwareFilterFactory, namespaces, query, requestMaxFeatures, RESOLVE_TIMEOUT_POLL_INTERVAL, resolveDepth, resolveTimeOut, selectedMapping, selectedProperties, store, transaction, UNBOUNDED_MULTI_VALUE, XLINK_HREF_NAME, xpathAttributeBuilder

Constructor Summary

Constructors

Constructor	Description
XmlMappingFeatureIterator(AppSchemaDataAccess store, FeatureTypeMapping mapping, Query query)
XmlMappingFeatureIterator(AppSchemaDataAccess store, FeatureTypeMapping mapping, Query query, String xpath, String value)

Method Summary

Modifier and Type	Method	Description
protected void	closeSourceFeatures()
protected Feature	computeNext()
static String	createIndexedItemXpathString(XmlFeatureTypeMapping mapping, XmlResponse xmlResponse, int indexCounter)
protected String	extractIdForAttribute(Expression idExpression, Object sourceInstance)	Based on the set of xpath expression/id extracting expression, finds the ID for the attribute idExpression from the source complex attribute.
protected FeatureIterator<? extends Feature>	getSourceFeatureIterator()
protected List<String>	getValue(String expressionValue)
boolean	hasNext()	Return true if there are more features.
protected boolean	isNextSourceFeatureNull()
protected boolean	isSourceFeatureIteratorNull()
protected Feature	populateFeatureData()
protected void	setClientProperties(Attribute target, Object xpathPrefix, Map<Name,Expression> clientProperties)
protected boolean	sourceFeatureIteratorHasNext()
protected boolean	unprocessedFeatureExists()

Methods inherited from class DataAccessMappingFeatureIterator

checkForeignIdValues, checkForeignIdValues, cleanEmptyElements, extractIdForFeature, getForeignIdValues, getIdValues, getMappedSource, getNextFeatureId, getSources, getValue, getValues, initialiseSourceFeatures, isByReference, isReprojectionCrsEqual, isTransactionOwner, peekNextValue, peekValue, populateFeatureData, setAttributeValue, setForeignIds, setListFilter, setNextFeature, setXlinkReference, skip, skipNestedMapping, skipTopElement

Methods inherited from class AbstractMappingFeatureIterator

close, getClientProperties, getTransaction, getUnrolledQuery, isHasNextCalled, next, referenceToIdentifier, remove, setAttributeContent, setGeometryUserData, setHasNextCalled

Methods inherited from class Object

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

Methods inherited from interface Iterator

forEachRemaining

Field Details

XPATH_SEPARATOR

public static final String XPATH_SEPARATOR

Constants for manipulating XPath Expressions

See Also:

• Constant Field Values

xmlResponse

protected XmlResponse xmlResponse

Constructor Details

XmlMappingFeatureIterator

public XmlMappingFeatureIterator(AppSchemaDataAccess store,
 FeatureTypeMapping mapping,
 Query query)
                          throws IOException

Parameters:

mapping - place holder for the target type, the surrogate FeatureSource and the mappings between them.

query - the query over the target feature type, that is to be unpacked to its equivalent over the surrogate feature type.

Throws:

IOException

XmlMappingFeatureIterator

public XmlMappingFeatureIterator(AppSchemaDataAccess store,
 FeatureTypeMapping mapping,
 Query query,
 String xpath,
 String value)
                          throws IOException

Throws:

IOException

Method Details

getSourceFeatureIterator

protected FeatureIterator<? extends Feature> getSourceFeatureIterator()

Overrides:

getSourceFeatureIterator in class DataAccessMappingFeatureIterator

isSourceFeatureIteratorNull

protected boolean isSourceFeatureIteratorNull()

Overrides:

isSourceFeatureIteratorNull in class DataAccessMappingFeatureIterator

extractIdForAttribute

protected String extractIdForAttribute(Expression idExpression,
 Object sourceInstance)

Description copied from class: AbstractMappingFeatureIterator

Based on the set of xpath expression/id extracting expression, finds the ID for the attribute idExpression from the source complex attribute.

Overrides:

extractIdForAttribute in class DataAccessMappingFeatureIterator

Parameters:

idExpression - the location path of the attribute to be created, for which to obtain the id by evaluating the corresponding org.geotools.filter.Expression from sourceInstance.

sourceInstance - a complex attribute which is the source of the mapping.

Returns:

the ID to be applied to a new attribute instance addressed by attributeXPath , or null if there is no an id mapping for that attribute.

createIndexedItemXpathString

public static String createIndexedItemXpathString(XmlFeatureTypeMapping mapping,
 XmlResponse xmlResponse,
 int indexCounter)

populateFeatureData

protected Feature populateFeatureData()
                               throws IOException

Throws:

IOException

setClientProperties

protected void setClientProperties(Attribute target,
 Object xpathPrefix,
 Map<Name,Expression> clientProperties)

Overrides:

setClientProperties in class AbstractMappingFeatureIterator

unprocessedFeatureExists

protected boolean unprocessedFeatureExists()

Overrides:

unprocessedFeatureExists in class DataAccessMappingFeatureIterator

sourceFeatureIteratorHasNext

protected boolean sourceFeatureIteratorHasNext()

Overrides:

sourceFeatureIteratorHasNext in class DataAccessMappingFeatureIterator

isNextSourceFeatureNull

protected boolean isNextSourceFeatureNull()

Overrides:

isNextSourceFeatureNull in class DataAccessMappingFeatureIterator

getValue

protected List<String> getValue(String expressionValue)

closeSourceFeatures

protected void closeSourceFeatures()

Overrides:

closeSourceFeatures in class DataAccessMappingFeatureIterator

hasNext

public boolean hasNext()

Return true if there are more features.

Specified by:

hasNext in interface FeatureIterator<Feature>

Specified by:

hasNext in interface Iterator<Feature>

Overrides:

hasNext in class DataAccessMappingFeatureIterator

Returns:

true if more Features exist, false otherwise.

See Also:

• Iterator.hasNext()

computeNext

protected Feature computeNext()
                       throws IOException

Overrides:

computeNext in class DataAccessMappingFeatureIterator

Throws:

IOException