org.opengis.sld
Interface StyledLayerDescriptor

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@XmlElement(value="StyledLayerDescriptor")
public interface StyledLayerDescriptor

The WMS-layers level of SLD is defined in the “StyledLayerDescriptor.xsd” XML- Schema file and provides the “glue” between feature styling as defined by Symbology Encoding and WMS layers. This level of definitions has been decoupled from the feature- style and symbol definitions to make it convenient to perform feature styling in environments other than inside of a WMS.

Since:

GeoAPI 2.2

Version:

Implementation specification 1.1.0

Method Summary

Object	accept(SLDVisitor visitor, Object extraData) calls the visit method of a SLDVisitor
Description	getDescription() The Description element is also reused throughout SE and SLD and gives an informative description of the “object” being defined.
String	getName() The Name element allows a symbolic name to be associated with a given SLD document.
String	getVersion() The version attribute gives the SLD version of an SLD document, to facilitate backward compatibility with static documents stored in various different versions of the SLD specification.
List<? extends Layer>	layers() The styled layers can correspond to either named layers (NamedLayer) or user-defined layers (UserLayer), which are described in subsequent subclauses.
List<? extends SLDLibrary>	libraries() The UseSLDLibrary element provides the ability of handling external SLD documents to be used in library-mode even when using XML-encoded POST requests with a WMS.

Method Detail

getName

@XmlParameter(value="Name")
String getName()

The Name element allows a symbolic name to be associated with a given SLD document. This element is used with most “objects” defined by SE and SLD to allow them to be referenced. Names must be unique in the context in which they are defined.

getDescription

@XmlElement(value="Description")
Description getDescription()

The Description element is also reused throughout SE and SLD and gives an informative description of the “object” being defined. This information can be extracted and used for such purposes as creating informal searchable metadata in catalogue systems. More metadata fields may be added to this element in the future. The Name is not considered to be part of a description since a name has a functional use that is more than just descriptive.

libraries

@XmlElement(value="UseSLDLibrary")
List<? extends SLDLibrary> libraries()

The UseSLDLibrary element provides the ability of handling external SLD documents to be used in library-mode even when using XML-encoded POST requests with a WMS. (The library mode can be accessed with the HTTP-GET method by supplying an SLD CGI parameter in addition to LAYERS and STYLES CGI parameters.) This addition merely exercises pre-existing functionality in WMS, but it does add the wrinkle of making SLD-library references iterative and (syntactically) recursive. Successive definitions are applied “on top of” previous ones to determine the scoping of overlapping style definitions.

layers

@XmlElement(value="NamedLayer,UserLayer")
List<? extends Layer> layers()

The styled layers can correspond to either named layers (NamedLayer) or user-defined layers (UserLayer), which are described in subsequent subclauses. There may be any number of either type of styled layer, including zero, mixed in any order. The order that the layer references appear in the SLD document will be the order that the styled layers are rendered, with successive styled layers rendered on top of previous styled layers.

getVersion

@XmlParameter(value="Version")
String getVersion()

The version attribute gives the SLD version of an SLD document, to facilitate backward compatibility with static documents stored in various different versions of the SLD specification. The string has the format “x.y.z”, the same as in other OGC Implementation specifications. For example, an SLD document stored according to this specification would have the version string “1.1.0”. The attribute is required.

accept

@Extension
Object accept(SLDVisitor visitor,
                        Object extraData)

calls the visit method of a SLDVisitor

Parameters:

visitor - the sld visitor