All Known Implementing Classes:

FeatureTypeStyleImpl
```
public interface FeatureTypeStyle
```
Represents a style that applies to features or coverage.

Since:

GeoAPI 2.2

Author:

Open Geospatial Consortium, Johann Sorel (Geomatys), Chris Dillard (SYS Technologies)

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class FeatureTypeStyle.RenderingSelectionOptions

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`COMPOSITE`	Applies a color composition/blending operation at the feature type style level (that is, blending the current FTS level against the map below it).
`static String`	`COMPOSITE_BASE`	Boolean value, if true the current feature type style will be treated as a base for the subsequent feature type styles in the rendering stack (including other layer ones) as opposed to use the merged backdrop rendered so far.
`static String`	`KEY_EVALUATION_MODE`	This option influences how multiple rules matching the same feature are evaluated
`static String`	`SORT_BY`	String value controlling the order in which the features are loaded from the data source, and thus painted, in this feature type style.
`static String`	`SORT_BY_GROUP`	String value controlling cross layer z-ordering.
`static String`	`VALUE_EVALUATION_MODE_ALL`	The standard behavior, all the matching rules are executed
`static String`	`VALUE_EVALUATION_MODE_FIRST`	Only the first matching rule gets executed, all the others are skipped
`static String`	`VENDOR_OPTION_INCLUSION`	String value allowing to control whether an SLD element should be included when applying the style to render maps or a legends.
`static String`	`VT_ATTRIBUTES`	Set of attributes to be included in vector tiles.
`static String`	`VT_COALESCE`	Coalesce the geometries of features sharing the same attribute values
`static String`	`VT_LABEL_ATTRIBUTES`	Set of attributes to be included in the vector tiles label layer.
`static String`	`VT_LABELS`	Wheter or not a dedicated label layer should be generated for vector tiles.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`accept(StyleVisitor visitor)`
`Object`	`accept(TraversingStyleVisitor visitor, Object extraData)`	calls the visit method of a StyleVisitor
`Set<Name>`	`featureTypeNames()`	Returns the names of the feature type that this style is meant to act upon.
`Description`	`getDescription()`	Description for this style.
`Id`	`getFeatureInstanceIDs()`	Returns a collection of Object identifying features object.
`String`	`getName()`	Returns a name for this style.
`OnLineResource`	`getOnlineResource()`	It is common to have a style coming from a external xml file, this method provide a way to get the original source if there is one.
`Map<String,String>`	`getOptions()`	Map of vendor options for the symbolizer.
`Expression`	`getTransformation()`	The eventual transformation to be applied before rendering the data (should be an expression taking a feature collection or a grid coverage as the evaluation context and returns a feature collection or a grid coverage as an output)
`boolean`	`hasOption(String key)`	Determines if a vendor option with the specific key has been set on this symbolizer.
`List<Rule>`	`rules()`	Rules govern the appearance of any given feature to be styled by this styler.
`Set<SemanticType>`	`semanticTypeIdentifiers()`	Returns a collection that identifies the more general "type" of geometry that this style is meant to act upon.
`void`	`setName(String name)`
`void`	`setOnlineResource(OnLineResource online)`	It is common to have a style coming from a external xml file, this method provide a way to get the original source if there is one.
`void`	`setTransformation(Expression transformation)`	Sets the eventual transformation to be applied before rendering the data (should be an expression taking a feature collection or a grid coverage as an input and returns a feature collection or a grid coverage as an output)

- Field Detail
  - KEY_EVALUATION_MODE
```
static final String KEY_EVALUATION_MODE
```
    This option influences how multiple rules matching the same feature are evaluated
    
    See Also:
    
    Constant Field Values
  - VALUE_EVALUATION_MODE_ALL
```
static final String VALUE_EVALUATION_MODE_ALL
```
    The standard behavior, all the matching rules are executed
    
    See Also:
    
    Constant Field Values
  - VALUE_EVALUATION_MODE_FIRST
```
static final String VALUE_EVALUATION_MODE_FIRST
```
    Only the first matching rule gets executed, all the others are skipped
    
    See Also:
    
    Constant Field Values
  - COMPOSITE
```
static final String COMPOSITE
```
    Applies a color composition/blending operation at the feature type style level (that is, blending the current FTS level against the map below it).
    The syntax for this key is {code}name[,opacity]{code} where:
    
    {code}name is one of the SVG composition operations, in particular, copy, destination, source-over, destination-over, source-in, destination-in, source-out, destination-out, source-atop, destination-atop, xor, multiply, screen, overlay, darken, lighten, color-dodge, color-burn, hard-light, soft-light, difference, exclusion
    {opacity} indicates the opacity level to be used during the operation, defauls to 1
    For example:
    
    {code}source-atop, 0.5{code} composes the current FTS exclusively where the previous map has already been drawn, using a 0.5 opacity level
    {code}multiply{code} blends the current FTS with the underlying map using color multiplication
    
    The same vendor option can also be applied at the symbolizer level to achieve different effects (feature by feature composition as oppose to layer by layer one).
    Important note: for most compositing operation to work properly, the graphics used for the rendering should be derived from an image that has an alpha channel and transparent background (as most of the operations consider the transparency of the target surface in their math)
    See Also:
    
    Constant Field Values
  - COMPOSITE_BASE
```
static final String COMPOSITE_BASE
```
    Boolean value, if true the current feature type style will be treated as a base for the subsequent feature type styles in the rendering stack (including other layer ones) as opposed to use the merged backdrop rendered so far. When the top of the stack is reached, or another base is found, this FTS will be merged into the backdrop, eventually using the indicated composite operator
    
    See Also:
    
    Constant Field Values
  - SORT_BY
```
static final String SORT_BY
```
    String value controlling the order in which the features are loaded from the data source, and thus painted, in this feature type style.
    The syntax is Attribute1 {A|D},Attribute2 {A|D}..., A is ascending, D is descending. The sorting direction is optional and defaults to ascending if not specified.
    E.g., cat D,name sorts data by cat in descending order, and then by ascending name within all features having the same cat value.
    
    See Also:
    
    Constant Field Values
  - SORT_BY_GROUP
```
static final String SORT_BY_GROUP
```
    String value controlling cross layer z-ordering. Several feature type styles in the same sortByGroup will have their features globally ordered before painting, for example, in order to respect their real world relationships. FeatureTypeStyle are grouped only if they are adjacent in the overall MapContent (even across layers). In case compositing is used in the same FeatureTypeStyle, the first value in group will be used for the entire group.
    
    See Also:
    
    Constant Field Values
  - VENDOR_OPTION_INCLUSION
```
static final String VENDOR_OPTION_INCLUSION
```
    String value allowing to control whether an SLD element should be included when applying the style to render maps or a legends. The option can be used also on Rule and all the Symbolizers. Possible values are normal, legendOnly, mapOnly.
    
    See Also:
    
    Constant Field Values
  - VT_ATTRIBUTES
```
static final String VT_ATTRIBUTES
```
    Set of attributes to be included in vector tiles. Used by the GeoServer vector tiles module, declared here so that it can be referred to from style languages.
    
    See Also:
    
    Constant Field Values
  - VT_LABELS
```
static final String VT_LABELS
```
    Wheter or not a dedicated label layer should be generated for vector tiles. Useful for polygon layers, but also for point and line layers, as it will include only features whose label attributes are not null. Used by the GeoServer vector tiles module, declared here so that it can be referred to from style languages
    
    See Also:
    
    Constant Field Values
  - VT_LABEL_ATTRIBUTES
```
static final String VT_LABEL_ATTRIBUTES
```
    Set of attributes to be included in the vector tiles label layer. Used by the GeoServer vector tiles module, declared here so that it can be referred to from style languages
    
    See Also:
    
    Constant Field Values
  - VT_COALESCE
```
static final String VT_COALESCE
```
    Coalesce the geometries of features sharing the same attribute values
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getName
```
String getName()
```
    Returns a name for this style. This can be any string that uniquely identifies this style within a given canvas. It is not meant to be human-friendly. (The "title" property is meant to be human friendly.)
    
    Returns:
    
    a name for this style.
  - setName
```
void setName(String name)
```
  - getDescription
```
Description getDescription()
```
    Description for this style.
    
    Returns:
    
    Human readable description for use in user interfaces
    
    Since:
    
    2.5.x
  - getFeatureInstanceIDs
```
Id getFeatureInstanceIDs()
```
    Returns a collection of Object identifying features object.
    ISO 19117 extends FeatureTypeStyle be providing this method. This method enable the possibility to use a feature type style on a given list of features only, which is not possible in OGC SE.
    
    Returns:
    
    Collection
  - featureTypeNames
```
Set<Name> featureTypeNames()
```
    Returns the names of the feature type that this style is meant to act upon.
    In OGC Symbology Encoding define this method to return a single String, and ISO 19117 use a Collection of String. We've choosen ISO because it is more logic that a featureTypeStyle can be applied to multiple featuretypes and not limited to a single one.
    
    Returns:
    
    the name of the feature type that this style is meant to act upon.
  - semanticTypeIdentifiers
```
Set<SemanticType> semanticTypeIdentifiers()
```
    Returns a collection that identifies the more general "type" of geometry that this style is meant to act upon. In the current OGC SE specifications, this is an experimental element and can take only one of the following values:
    
    generic:point
    generic:line
    generic:polygon
    generic:text
    generic:raster
    generic:any
  - rules
```
List<Rule> rules()
```
    Rules govern the appearance of any given feature to be styled by this styler.
    This is *the* list being used to manage the rules!
    
    Since:
    
    GeoTools 2.2.M3, GeoAPI 2.0
  - getOnlineResource
```
OnLineResource getOnlineResource()
```
    It is common to have a style coming from a external xml file, this method provide a way to get the original source if there is one. OGC SLD specification can use this method to know if a style must be written completely or if writing the online resource path is enough.
    
    Returns:
    
    OnlineResource or null
  - setOnlineResource
```
void setOnlineResource(OnLineResource online)
```
    It is common to have a style coming from a external xml file, this method provide a way to get the original source if there is one.
    
    Parameters:
    
    online - location external file defining this style, or null if not available
  - accept
```
void accept(StyleVisitor visitor)
```
  - getTransformation
```
Expression getTransformation()
```
    The eventual transformation to be applied before rendering the data (should be an expression taking a feature collection or a grid coverage as the evaluation context and returns a feature collection or a grid coverage as an output)
  - accept
```
Object accept(TraversingStyleVisitor visitor,
              Object extraData)
```
    calls the visit method of a StyleVisitor
    
    Parameters:
    
    visitor - the style visitor
  - setTransformation
```
void setTransformation(Expression transformation)
```
    Sets the eventual transformation to be applied before rendering the data (should be an expression taking a feature collection or a grid coverage as an input and returns a feature collection or a grid coverage as an output)
  - hasOption
```
boolean hasOption(String key)
```
    Determines if a vendor option with the specific key has been set on this symbolizer.
  - getOptions
```
Map<String,String> getOptions()
```
    Map of vendor options for the symbolizer.
    Client code looking for the existence of a single option should use hasOption(String)

Interface FeatureTypeStyle

Nested Class Summary

Field Summary

Method Summary

Field Detail

KEY_EVALUATION_MODE

VALUE_EVALUATION_MODE_ALL

VALUE_EVALUATION_MODE_FIRST

COMPOSITE

COMPOSITE_BASE

SORT_BY

SORT_BY_GROUP

VENDOR_OPTION_INCLUSION

VT_ATTRIBUTES

VT_LABELS

VT_LABEL_ATTRIBUTES

VT_COALESCE

Method Detail

getName

setName

getDescription

getFeatureInstanceIDs

featureTypeNames

semanticTypeIdentifiers

rules

getOnlineResource

setOnlineResource

accept

getTransformation

accept

setTransformation

hasOption

getOptions