Direct Known Subclasses:

JoiningQuery
```
public class Query
extends Object
```
Encapsulates a request for data, typically as:
```
 Query query = ...
 myFeatureSource.getFeatures(query);
 
```
The query class is based on the Web Feature Server specification and offers a few interesting capabilities such as the ability to sort results and use a filter (similar to the WHERE clause in SQL).
Additional capabilities:
- setMaxFeatures(int) and setStartIndex(Integer) can be used implement 'paging' through the data source's content. This is useful if, for example, the FeatureSource has an upper limit on the number of features it can return in a single request or you are working with limited memory.
- setHandle(String) can be used to give the query a mnemonic name which will appear in error reporing and logs.
- setCoordinateSystem(CoordinateReferenceSystem) is used to to specify the coordinate system that retrieved features will be "forced" into. This is often used to correct a feature source when the application and the data format have different ideas about the coordinate system (for example, the "axis order" issue).
- setCoordinateSystemReproject(CoordinateReferenceSystem) is used to ask for the retrieved features to be reproejcted.
Vendor specific:
- setHints(org.geotools.util.factory.Hints) is used to specify venfor specific capabilities provided by a feature source implementation.
Joins:
The Query class supports the concepts of joins in that a query can result in a join of the feature type to other feature types in the same datastore. For example, the following would be a spatial join that selected the country that contain a particular city.
```
 Query query = new Query("countries");
 Join join = new Join("cities", CQL.toFilter("CONTAINS(geometry, b.geometry)"));
 join.setAlias("b");
 join.setFilter(CQL.toFilter("CITY_NAME = 'Canmore'"))
 query.getJoins().add(join);
 
```
Example:
```
 Filter filter = CQL.toFilter("NAME like '%land'");
 Query query = new Query( "countries", filter );

 FeatureCollection features = featureSource.getFeatures( query );
 
```
Author:

Chris Holmes

Field Summary

Fields
Modifier and Type	Field	Description
`protected String`	`alias`	The optional alias for type name
`static Query`	`ALL`	Implements a query that will fetch all features from a datasource.
`static String[]`	`ALL_NAMES`	A constant (value `null`) that can be used with setPropertyNames(String[]) to indicate that all properties are to be retrieved.
`static List<PropertyName>`	`ALL_PROPERTIES`	A constant (value `null`) that can be used with setProperties(java.util.List<org.geotools.api.filter.expression.PropertyName>) to indicate that all properties are to be retrieved.
`protected CoordinateReferenceSystem`	`coordinateSystem`	Coordinate System associated with this query
`protected CoordinateReferenceSystem`	`coordinateSystemReproject`	Reprojection associated associated with this query
`static int`	`DEFAULT_MAX`	So getMaxFeatures does not return null we use a very large number.
`static Query`	`FIDS`	Implements a query that will fetch all the FeatureIDs from a datasource.
`protected Filter`	`filter`	The filter to constrain the request.
`protected String`	`handle`	The handle associated with this query.
`protected Hints`	`hints`	The hints to be used during query execution
`static Hints.Key`	`INCLUDE_MANDATORY_PROPS`	When specifying properties to select, setting this hint flag true tells the datastore to include mandatory properties (i.e. properties with minOccurs >= 1) in the end result, irrespective of whether they are not included in the list of properties.
`protected List<Join>`	`joins`	join clauses for this query
`protected int`	`maxFeatures`	The maximum numbers of features to fetch
`protected URI`	`namespace`	The namespace to get
`static String[]`	`NO_NAMES`	A constant (empty String array) that can be used with setPropertyNames(String[]) to indicate that no properties are to be retrieved.
`static URI`	`NO_NAMESPACE`	Constant (actually null) used to represent no namespace restrictions on the returned result, should be considered ANY_URI
`static List<PropertyName>`	`NO_PROPERTIES`	A constant (empty String array) that can be used with setProperties(java.util.List<org.geotools.api.filter.expression.PropertyName>) to indicate that no properties are to be retrieved.
`protected List<PropertyName>`	`properties`	The properties to fetch
`protected SortBy[]`	`sortBy`	Sorting for the query
`protected Integer`	`startIndex`	The index of the first feature to process
`protected String`	`typeName`	The typeName to get
`protected String`	`version`	The version according to WFS 1.0 and 1.1 specs

Constructor Summary

Constructors
Constructor	Description
`Query()`	Default constructor.
`Query(String typeName)`	Constructor.
`Query(String typeName, URI namespace, Filter filter, int maxFeatures, String[] propNames, String handle)`	Constructor.
`Query(String typeName, URI namespace, Filter filter, int maxFeatures, List<PropertyName> properties, String handle)`	Constructor.
`Query(String typeName, Filter filter)`	Constructor.
`Query(String typeName, Filter filter, int maxFeatures, String[] propNames, String handle)`	Constructor.
`Query(String typeName, Filter filter, int maxFeatures, List<PropertyName> properties, String handle)`	Constructor.
`Query(String typeName, Filter filter, String... properties)`	Constructor.
`Query(String typeName, Filter filter, List<PropertyName> properties)`	Constructor.
`Query(Query query)`	Copy contructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	Equality based on all query parameters other than the handle.
`String`	`getAlias()`	An alias substitutable for `getTypeName()`.
`CoordinateReferenceSystem`	`getCoordinateSystem()`	Get the coordinate system to use as an override for features retrieved by this Query.
`CoordinateReferenceSystem`	`getCoordinateSystemReproject()`	If reprojection has been requested, this returns the coordinate system that features retrieved by this Query will be reprojected into.
`Filter`	`getFilter()`	Gets the filter used to define constraints on the features that will be retrieved by this Query.
`String`	`getHandle()`	Get the handle (mnemonic name) that will be associated with this Query.
`Hints`	`getHints()`	Get hints that have been set to control the query execution.
`List<Join>`	`getJoins()`	The list of joins for this query.
`int`	`getMaxFeatures()`	Get the maximum number of features that will be retrieved by this Query.
`URI`	`getNamespace()`	Get the namespace of the feature type to be queried.
`List<PropertyName>`	`getProperties()`	Get the names of the properties that this Query will retrieve values for as part of the returned FeatureCollection.
`String[]`	`getPropertyNames()`	Get the names of the properties that this Query will retrieve as part of the returned FeatureCollection.
`SortBy[]`	`getSortBy()`	SortBy results according to indicated property and order.
`Integer`	`getStartIndex()`	Get the index of the first feature to retrieve.
`String`	`getTypeName()`	Get the name of the feature type to be queried.
`String`	`getVersion()`	Defines version or version range requested.
`int`	`hashCode()`	Hashcode based on all parameters other than the handle.
`boolean`	`isMaxFeaturesUnlimited()`	Check if this query allows an unlimited number of features to be returned.
`boolean`	`retrieveAllProperties()`	Convenience method to determine if the query should retrieve all properties defined in the schema of the feature data source.
`void`	`setAlias(String alias)`	Sets the type name alias.
`void`	`setCoordinateSystem(CoordinateReferenceSystem system)`	Provide an override coordinate system to apply to features retrieved by this Query.
`void`	`setCoordinateSystemReproject(CoordinateReferenceSystem system)`	Request that features retrieved by this Query be reprojected into the given coordinate system.
`void`	`setFilter(Filter filter)`	Sets the filter to constrain the features that will be retrieved by this Query.
`void`	`setHandle(String handle)`	Set the handle (mnemonic name) that will be associated with this Query.
`void`	`setHints(Hints hints)`	Set hints to control the query execution.
`void`	`setMaxFeatures(int maxFeatures)`	Sets the maximum number of features that should be retrieved by this query.
`void`	`setNamespace(URI namespace)`	Set the namespace of the feature type to be queried.
`void`	`setProperties(List<PropertyName> propNames)`	Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection.
`void`	`setPropertyNames(String... propNames)`	Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection.
`void`	`setPropertyNames(List<String> propNames)`	Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection.
`void`	`setSortBy(SortBy... sortBy)`	Sets the sort by information.
`void`	`setStartIndex(Integer startIndex)`	Set the index of the first feature to retrieve.
`void`	`setTypeName(String typeName)`	Sets the name of the feature type to be queried.
`void`	`setVersion(int index)`
`void`	`setVersion(String version)`	Set the version of features to retrieve where this is supported by the data source being queried.
`void`	`setVersion(Date date)`
`void`	`setVersion(Date startTime, Date endTime)`
`void`	`setVersion(ResourceId history)`
`void`	`setVersion(Version.Action action)`
`String`	`toString()`	Return a string representation of this Query.

Methods inherited from class Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - INCLUDE_MANDATORY_PROPS
```
public static Hints.Key INCLUDE_MANDATORY_PROPS
```
    When specifying properties to select, setting this hint flag true tells the datastore to include mandatory properties (i.e. properties with minOccurs >= 1) in the end result, irrespective of whether they are not included in the list of properties.
    Datastores may implement adding all mandatory properties to the end result when this flag is set to true. For example:
    Object includeProps = query.getHints().get(Query.INCLUDE_MANDATORY_PROPS); if (includeProps instanceof Boolean && ((Boolean)includeProps).booleanValue()) { query.setProperties (DataUtilities.addMandatoryProperties(type, query.getProperties())); }
  - NO_NAMESPACE
```
public static final URI NO_NAMESPACE
```
    Constant (actually null) used to represent no namespace restrictions on the returned result, should be considered ANY_URI
  - DEFAULT_MAX
```
public static final int DEFAULT_MAX
```
    So getMaxFeatures does not return null we use a very large number.
    
    See Also:
    
    Constant Field Values
  - ALL
```
public static final Query ALL
```
    Implements a query that will fetch all features from a datasource. This query should retrieve all properties, with no maxFeatures, no filtering, and the default featureType.
  - FIDS
```
public static final Query FIDS
```
    Implements a query that will fetch all the FeatureIDs from a datasource. This query should retrieve no properties, with no maxFeatures, no filtering, and the a featureType with no attribtues.
  - NO_NAMES
```
public static final String[] NO_NAMES
```
    A constant (empty String array) that can be used with setPropertyNames(String[]) to indicate that no properties are to be retrieved.
    Note the query will still return a result - limited to FeatureIDs.
  - ALL_NAMES
```
public static final String[] ALL_NAMES
```
    A constant (value null) that can be used with setPropertyNames(String[]) to indicate that all properties are to be retrieved.
  - NO_PROPERTIES
```
public static final List<PropertyName> NO_PROPERTIES
```
    A constant (empty String array) that can be used with setProperties(java.util.List<org.geotools.api.filter.expression.PropertyName>) to indicate that no properties are to be retrieved.
    Note the query will still return a result - limited to FeatureIDs.
  - ALL_PROPERTIES
```
public static final List<PropertyName> ALL_PROPERTIES
```
    A constant (value null) that can be used with setProperties(java.util.List<org.geotools.api.filter.expression.PropertyName>) to indicate that all properties are to be retrieved.
  - properties
```
protected List<PropertyName> properties
```
    The properties to fetch
  - maxFeatures
```
protected int maxFeatures
```
    The maximum numbers of features to fetch
  - startIndex
```
protected Integer startIndex
```
    The index of the first feature to process
  - filter
```
protected Filter filter
```
    The filter to constrain the request.
  - typeName
```
protected String typeName
```
    The typeName to get
  - alias
```
protected String alias
```
    The optional alias for type name
  - namespace
```
protected URI namespace
```
    The namespace to get
  - handle
```
protected String handle
```
    The handle associated with this query.
  - coordinateSystem
```
protected CoordinateReferenceSystem coordinateSystem
```
    Coordinate System associated with this query
  - coordinateSystemReproject
```
protected CoordinateReferenceSystem coordinateSystemReproject
```
    Reprojection associated associated with this query
  - sortBy
```
protected SortBy[] sortBy
```
    Sorting for the query
  - version
```
protected String version
```
    The version according to WFS 1.0 and 1.1 specs
  - hints
```
protected Hints hints
```
    The hints to be used during query execution
  - joins
```
protected List<Join> joins
```
    join clauses for this query
- Constructor Detail
  - Query
```
public Query()
```
    Default constructor. Use setter methods to configure the Query before use (the default Query will retrieve all features).
  - Query
```
public Query(String typeName)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve
  - Query
```
public Query(String typeName,
             Filter filter)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    filter - the OGC filter to constrain the request.
  - Query
```
public Query(String typeName,
             Filter filter,
             String... properties)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    filter - the OGC filter to constrain the request.
    
    properties - an array of the properties to fetch.
  - Query
```
public Query(String typeName,
             Filter filter,
             List<PropertyName> properties)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    filter - the OGC filter to constrain the request.
    
    properties - a list of the properties to fetch.
  - Query
```
public Query(String typeName,
             Filter filter,
             int maxFeatures,
             String[] propNames,
             String handle)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    filter - the OGC filter to constrain the request.
    
    maxFeatures - the maximum number of features to be returned.
    
    propNames - an array of the properties to fetch.
    
    handle - the name to associate with this query.
  - Query
```
public Query(String typeName,
             Filter filter,
             int maxFeatures,
             List<PropertyName> properties,
             String handle)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    filter - the OGC filter to constrain the request.
    
    maxFeatures - the maximum number of features to be returned.
    
    properties - a list of the properties to fetch.
    
    handle - the name to associate with this query.
  - Query
```
public Query(String typeName,
             URI namespace,
             Filter filter,
             int maxFeatures,
             String[] propNames,
             String handle)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    namespace - Namespace for provided typeName, or null if unspecified
    
    filter - the OGC filter to constrain the request.
    
    maxFeatures - the maximum number of features to be returned.
    
    propNames - an array of the properties to fetch.
    
    handle - the name to associate with the query.
  - Query
```
public Query(String typeName,
             URI namespace,
             Filter filter,
             int maxFeatures,
             List<PropertyName> properties,
             String handle)
```
    Constructor.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
    
    namespace - Namespace for provided typeName, or null if unspecified
    
    filter - the OGC filter to constrain the request.
    
    maxFeatures - the maximum number of features to be returned.
    
    properties - a list of the property names to fetch.
    
    handle - the name to associate with the query.
  - Query
```
public Query(Query query)
```
    Copy contructor.
    
    Parameters:
    
    query - the query to copy
- Method Detail
  - getPropertyNames
```
public String[] getPropertyNames()
```
    Get the names of the properties that this Query will retrieve as part of the returned FeatureCollection.
    
    Returns:
    
    the attributes to be used in the returned FeatureCollection.
    
    See Also:
    
    retrieveAllProperties()
    
    TODO:
    
    REVISIT: make a FidProperties object, instead of an array size 0. I think Query.FIDS fills this role to some degree. Query.FIDS.equals( filter ) would meet this need?
  - setPropertyNames
```
public void setPropertyNames(String... propNames)
```
    Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection. As well as an array of names, the following constants can be used:
    
    ALL_NAMES to retrieve all properties.
    NO_NAMES to indicate no properties are required, just feature IDs.
    The available properties can be determined with FeatureSource.getSchema(). If properties that are not part of the source's schema are requested an exception will be thrown.
    Parameters:
    
    propNames - the names of the properties to retrieve or one of ALL_NAMES or NO_NAMES.
  - getProperties
```
public List<PropertyName> getProperties()
```
    Get the names of the properties that this Query will retrieve values for as part of the returned FeatureCollection.
    
    Returns:
    
    the xpath expressions to be used in the returned FeatureCollection.
    
    See Also:
    
    retrieveAllProperties()
  - setProperties
```
public void setProperties(List<PropertyName> propNames)
```
    Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection. As well as an array of names, the following constants can be used:
    
    ALL_PROPERTIES to retrieve all properties.
    NO_PROPERTIES to indicate no properties are required, just feature IDs.
    The available properties can be determined with FeatureSource.getSchema(). If properties that are not part of the source's schema are requested an exception will be thrown.
    Parameters:
    
    propNames - the names of the properties to retrieve or one of ALL_PROPERTIES or NO_PROPERTIES.
  - setPropertyNames
```
public void setPropertyNames(List<String> propNames)
```
    Set the names of the properties that this Query should retrieve as part of the returned FeatureCollection.
    The available properties can be determined with FeatureSource.getSchema(). If properties that are not part of the source's schema are requested an exception will be thrown.
    
    Parameters:
    
    propNames - the names of the properties to retrieve or ALL_NAMES; an empty List can be passed in to indicate that only feature IDs should be retrieved
    
    TODO:
    
    REVISIT: This syntax is really obscure. Consider having an fid or featureID propertyName that datasource implementors look for instead of looking to see if the list size is 0.
  - retrieveAllProperties
```
public boolean retrieveAllProperties()
```
    Convenience method to determine if the query should retrieve all properties defined in the schema of the feature data source. This is equivalent to testing if getPropertyNames() returns ALL_NAMES.
    
    Returns:
    
    true if all properties will be retrieved by this Query; false otherwise
  - getMaxFeatures
```
public int getMaxFeatures()
```
    Get the maximum number of features that will be retrieved by this Query.
    Note: This is the only method that is not directly out of the Query element in the WFS specification. It is instead a part of a GetFeature request, which can hold one or more queries. But each of those in turn will need a maxFeatures, so it is needed here.
    If the value returned here is max integer then the number of features should not be limited.
    
    Returns:
    
    the maximum number of features that will be retrieved by this query
  - isMaxFeaturesUnlimited
```
public boolean isMaxFeaturesUnlimited()
```
    Check if this query allows an unlimited number of features to be returned.
    
    Returns:
    
    true maxFeatures is less then zero, or equal to Integer.MAX_VALUE.
  - setMaxFeatures
```
public void setMaxFeatures(int maxFeatures)
```
    Sets the maximum number of features that should be retrieved by this query. The default is to retrieve all features.
    
    Parameters:
    
    maxFeatures - the maximum number of features to retrieve
  - getStartIndex
```
public Integer getStartIndex()
```
    Get the index of the first feature to retrieve.
    
    Returns:
    
    the index of the first feature to retrieve or null if no start index is defined.
  - setStartIndex
```
public void setStartIndex(Integer startIndex)
```
    Set the index of the first feature to retrieve. This can be used in conjuction with setMaxFeatures(int) to 'page' through a feature data source.
    
    Parameters:
    
    startIndex - index of the first feature to retrieve or null to indicate no start index
    
    Throws:
    
    IllegalArgumentException - if startIndex is less than 0
  - getFilter
```
public Filter getFilter()
```
    Gets the filter used to define constraints on the features that will be retrieved by this Query.
    
    Returns:
    
    The filter that defines constraints on the query.
  - setFilter
```
public void setFilter(Filter filter)
```
    Sets the filter to constrain the features that will be retrieved by this Query. If no filter is set all features will be retrieved (taking into account any bounds set via setMaxFeatures(int) and setStartIndex(java.lang.Integer)).
    The default is Filter.INCLUDE.
    
    Parameters:
    
    filter - the OGC filter which features must pass through to be retrieved by this Query.
  - getTypeName
```
public String getTypeName()
```
    Get the name of the feature type to be queried.
    
    Returns:
    
    the name of the feature type to be returned with this query.
  - setTypeName
```
public void setTypeName(String typeName)
```
    Sets the name of the feature type to be queried. If no typename is specified, then the data source's default type will be used. When working with sources such as shapefiles that only support one feature type this method can be ignored.
    
    Parameters:
    
    typeName - the name of the featureType to retrieve.
  - getAlias
```
public String getAlias()
```
    An alias substitutable for getTypeName().
    This value is typically used in a join query in which the join filter requires disambiguation due to property name overlaps between joined types.
    
    Since:
    
    8.0
  - setAlias
```
public void setAlias(String alias)
```
    Sets the type name alias.
    
    Since:
    
    8.0
    
    See Also:
    
    getAlias()
  - getNamespace
```
public URI getNamespace()
```
    Get the namespace of the feature type to be queried.
    
    Returns:
    
    the gml namespace of the feature type to be returned with this query
  - setNamespace
```
public void setNamespace(URI namespace)
```
    Set the namespace of the feature type to be queried.
  - getHandle
```
public String getHandle()
```
    Get the handle (mnemonic name) that will be associated with this Query. The handle is used in logging and error reporting.
    
    Returns:
    
    the name to refer to this query.
  - setHandle
```
public void setHandle(String handle)
```
    Set the handle (mnemonic name) that will be associated with this Query. The handle is used in logging and error reporting.
    
    Parameters:
    
    handle - the name to refer to this query.
  - getVersion
```
public String getVersion()
```
    Defines version or version range requested.
    From WFS Spec: The version attribute is included in order to accommodate systems that support feature versioning. A value of ALL indicates that all versions of a feature should be fetched. Otherwise an integer, n, can be specified to return the n th version of a feature. The version numbers start at '1' which is the oldest version. If a version value larger than the largest version is specified then the latest version is return. The default action shall be for the query to return the latest version. Systems that do not support versioning can ignore the parameter and return the only version that they have.
    GeoTools employs the following options:
    
    setVersion(Date): "date: dow mon dd hh:mm:ss zzz yyyy"
    setVersion(int): "index"
    setVersion(Version.Action): "PREVIOUS", "LAST", "NEXT", "FIRST", "ALL"
    setVersion(Date, Date): "start: dow mon dd hh:mm:ss zzz yyyy end: dow mon dd hh:mm:ss zzz yyyy"
    Returns:
    
    the version of the feature to return, or null for LAST.
  setVersion
  
  public void setVersion(int index)
  
  setVersion
  
  public void setVersion(Date date)
  
  setVersion
  
  public void setVersion(Version.Action action)
  
  setVersion
  
  public void setVersion(Date startTime, Date endTime)
  
  setVersion
  
  public void setVersion(ResourceId history)
  
  setVersion
  
  public void setVersion(String version)
  
  Set the version of features to retrieve where this is supported by the data source being queried.
  
  Since:
  
  2.4
  
  See Also:
  
  getVersion() for explanation
  
  getCoordinateSystem
  
  public CoordinateReferenceSystem getCoordinateSystem()
  
  Get the coordinate system to use as an override for features retrieved by this Query.
  
  Returns:
  
  The coordinate system to be returned for Features from this Query (override the set coordinate system).
  
  setCoordinateSystem
  
  public void setCoordinateSystem(CoordinateReferenceSystem system)
  
  Provide an override coordinate system to apply to features retrieved by this Query.
  This denotes a request to temporarily override the coordinate system contained in the feature data source being queried. The same coordinate values will be used, but the features retrieved will appear in this Coordinate System.
  This change is not persistent and only applies to the features returned by this Query. If used in conjunction with getCoordinateSystemReproject() the reprojection will occur from getCoordinateSystem() to getCoordinateSystemReproject().
  
  Parameters:
  
  system - the coordinate system to apply to features retrieved by this Query
  
  getCoordinateSystemReproject
  
  public CoordinateReferenceSystem getCoordinateSystemReproject()
  
  If reprojection has been requested, this returns the coordinate system that features retrieved by this Query will be reprojected into.
  
  Returns:
  
  the coordinate system that features will be reprojected into (if set)
  
  See Also:
  
  setCoordinateSystemReproject( CoordinateReferenceSystem )
  
  setCoordinateSystemReproject
  
  public void setCoordinateSystemReproject(CoordinateReferenceSystem system)
  
  Request that features retrieved by this Query be reprojected into the given coordinate system.
  If used in conjunction with setCoordinateSystem(CoordinateReferenceSystem) the reprojection will occur from the overridden coordinate system to the system specified here.
  
  getSortBy
  
  public SortBy[] getSortBy()
  
  SortBy results according to indicated property and order.
  SortBy is part of the Filter 1.1 specification, it is referenced by WFS1.1 and Catalog 2.0.x specifications and is used to organize results. The SortBy's are ment to be applied in order:
  
  SortBy( year, ascending )
  SortBy( month, decsending )
  Would produce something like:
  [year=2002 month=4],[year=2002 month=3],[year=2002 month=2], [year=2002 month=1],[year=2003 month=12],[year=2002 month=4],
  
  SortBy should be considered at the same level of abstraction as Filter, and like Filter you may sort using properties not listed in getPropertyNames.
  At a technical level the interface SortBy2 is used to indicate the additional requirements of a GeoTools implementation. The pure WFS 1.1 specification itself is limited to SortBy.
  
  Returns:
  
  SortBy array or order of application
  
  setSortBy
  
  public void setSortBy(SortBy... sortBy)
  
  Sets the sort by information.
  
  getHints
  
  public Hints getHints()
  
  Get hints that have been set to control the query execution.
  
  Returns:
  
  hints that are set (may be empty)
  
  See Also:
  
  setHints(Hints) for more explanation
  
  setHints
  
  public void setHints(Hints hints)
  
  Set hints to control the query execution.
  Hints can control such things as:
  
  the GeometryFactory to be used
  a generalization distance to be applied
  the fetch size to be used in JDBC queries
  The set of hints supported can be found by calling FeatureSource.getSupportedHints().
  Note: Data sources may ignore hints (depending on their values) and no mechanism currently exists to discover which hints where actually used during the query's execution.
  
  Parameters:
  
  hints - the hints to apply
  
  See Also:
  
  Hints.FEATURE_DETACHED, Hints.JTS_GEOMETRY_FACTORY, Hints.JTS_COORDINATE_SEQUENCE_FACTORY, Hints.JTS_PRECISION_MODEL, Hints.JTS_SRID, Hints.GEOMETRY_DISTANCE, Hints.FEATURE_2D
  
  hashCode
  
  public int hashCode()
  
  Hashcode based on all parameters other than the handle.
  
  Overrides:
  
  hashCode in class Object
  
  Returns:
  
  hascode for this Query
  
  equals
  
  public boolean equals(Object obj)
  
  Equality based on all query parameters other than the handle.
  
  Overrides:
  
  equals in class Object
  
  Parameters:
  
  obj - Other object to compare against
  
  Returns:
  
  true if this Query matches the other object; false otherwise
  
  toString
  
  public String toString()
  
  Return a string representation of this Query.
  
  Overrides:
  
  toString in class Object
  
  Returns:
  
  a string representation of this Query
  
  getJoins
  
  public List<Join> getJoins()
  
  The list of joins for this query.
  Each Join object specifies a feature type to join to. The join may only reference a feature type from within the same datastore.
  
  See Also:
  
  Join

Class Query

Field Summary

Constructor Summary

Method Summary

Methods inherited from class Object

Field Detail

INCLUDE_MANDATORY_PROPS

NO_NAMESPACE

DEFAULT_MAX

ALL

FIDS

NO_NAMES

ALL_NAMES

NO_PROPERTIES

ALL_PROPERTIES

properties

maxFeatures

startIndex

filter

typeName

alias

namespace

handle

coordinateSystem

coordinateSystemReproject

sortBy

version

hints

joins

Constructor Detail

Query

Query

Query

Query

Query

Query

Query

Query

Query

Query

Method Detail

getPropertyNames

setPropertyNames

getProperties

setProperties

setPropertyNames

retrieveAllProperties

getMaxFeatures

isMaxFeaturesUnlimited

setMaxFeatures

getStartIndex

setStartIndex

getFilter

setFilter

getTypeName

setTypeName

getAlias

setAlias

getNamespace

setNamespace

getHandle

setHandle

getVersion

setVersion

setVersion

setVersion

setVersion

setVersion

setVersion

getCoordinateSystem

setCoordinateSystem

getCoordinateSystemReproject

setCoordinateSystemReproject

getSortBy

setSortBy

getHints

setHints

hashCode

equals

toString