Layer (Groovy Documentation)

geoscript.layer.Layer

All Implemented Interfaces and Traits:

Renderable
```
class Layer
```
A Layer is a source of spatial data that contains a collection of Features. Most often Layers are accessed from a Workspace but you can create an in memory Layer by simply passing a name and a Schema:
```
 Schema schema = new Schema("facilities", [new Field("geom","Point", "EPSG:2927"), new Field("name","string"), new Field("address","string")])
 Layer layer = new Layer("facilities", schema)
 
```
If, all you want to store in a Layer is Geometry, you can just pass a layer name:
```
 Layer layer = new Layer("points")
 layer.add([new Point(0,0)])
 layer.add([new Point(1,1)])
 
```
Authors:
Jared Erickson

Field Summary

Fields
Modifiers	Name	Description
`protected static FilterFactory2`	`filterFactory`	The FilterFactory2 for creating Filters

Properties Summary

Properties
Type	Name and description
`FeatureSource<SimpleFeatureType, SimpleFeature>`	`fs` The GeoTools FeatureSource
`java.lang.String`	`name` The name
`Projection`	`proj`
`Schema`	`schema` The Schema
`Style`	`style` The Style
`Workspace`	`workspace` The Workspace

Constructor Summary

Constructors
Constructor and description
`Layer (FeatureSource<SimpleFeatureType, SimpleFeature> fs)` Create a new Layer from a GeoTools FeatureSource
`Layer (Layer layer)` Create a new Layer from an existing Layer
`Layer (java.lang.String name, Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs, Schema schema)` Create a new Layer from a name, Workspace, FeatureSource, and Schema
`Layer (Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs)` Create a new Layer from a Workspace and FeatureSource
`Layer (java.lang.String name, Workspace workspace)` Create a new Layer from a name and Workspace
`Layer (java.lang.String name, Schema schema)` Create a new Layer with a name in the Memory Workspace
`Layer ()` Create a new Layer with a default name, Schema in the Memory Workspace
`Layer (java.lang.String name)` Create a new Layer with the given name, a simple Schema with just a Geometry Field in the Memory Workspace
`Layer (FeatureCollection fc)` Create a new Layer from a GeoTools FeatureCollection.
`Layer (java.lang.String name, FeatureCollection fc)` Create a new Layer from a GeoTools FeatureCollection

Methods Summary

Methods
Type Params	Return Type	Name and description
	`void`	`add(java.lang.Object o)` Add a Feature to the Layer
	`Bounds`	`bounds(java.lang.Object filter = null)` Get the Bounds of the Features in the Layer
	`Bounds`	`bounds(Map options)` Get the Bounds of Layer using named parameters
	`Layer`	`buffer(Map options = [:], double distance)` Buffer all of the Features in the this Layer.
	`Layer`	`buffer(Map options = [:], Expression distance)` Buffer all of the Features in the this Layer.
	`Layer`	`clip(Map options = [:], Layer clipLayer)` Clip this Layer by another Layer.
	`java.util.List`	`collectFromFeature(java.lang.Object filter = null, groovy.lang.Closure closure)` Collect values from the Features of a Layer
	`java.util.List`	`collectFromFeature(Map options, groovy.lang.Closure closure)` Collect values from the Features of a Layer
	`int`	`count(java.lang.Object filter = null)` Count the number of Features in the layer
	`int`	`count(Map options)` Count the number of Features using named parameters
	`void`	`delete(java.lang.Object filter = null)` Delete Features from the Layer
	`Layer`	`dissolve(Map options = [:], Field field)` Dissolve the Features of a Layer by a Field.
	`Layer`	`dissolve(Map options = [:])` Dissolve intersecting Features of a Layer.
	`void`	`eachFeature(java.lang.Object filter = null, groovy.lang.Closure closure)` Call the Closure for each Feature optionally filtered by the Filter
	`void`	`eachFeature(Map options, groovy.lang.Closure closure)` Call the Closure for each Feature.
	`Layer`	`erase(Map options = [:], Layer layer2)` Erase this Layer with another Layer.
	`Layer`	`filter(java.lang.Object filter = null, java.lang.String newName = newname()` Filer the Layer.
	`Feature`	`first(Map options = [:])` Get the first Feature that matches
	`Bounds`	`getBounds()` Get the Bounds of the Features in the Layer
	`int`	`getCount()` Count the number of Features in the layer
	`Cursor`	`getCursor(Map options)` Get a Cursor over the Features of the Layer using named parameters.
	`Cursor`	`getCursor(java.lang.Object filter = null, java.util.List sort = null, int max = -1, int start = -1, java.util.List fields = null, java.lang.Object sourceProj = null, java.lang.Object destProj = null, java.lang.Object params = null)` Get a Cursor over the Features of the Layer.
	`java.util.List<Feature>`	`getFeatures(java.lang.Object filter = null, groovy.lang.Closure transform = null, java.util.List sort = null, Map params = null)` Get a List of Features
	`java.util.List<Feature>`	`getFeatures(Map options)` Get a List of Features
	`java.lang.String`	`getFormat()` Get the Workspace format
	`java.util.List`	`getMapLayers(Bounds bounds, java.util.List size)` Get the map layers @return
	`java.lang.String`	`getName()` Get the Layer's name
	`Projection`	`getProj()` Get the Layer's Projection
	`Raster`	`getRaster(java.lang.Object field, java.util.List gridSize, Bounds bounds, java.lang.String rasterName)` Convert this Layer into a Raster
	`Writer`	`getWriter(Map options = [:])` Get a Writer for this Layer
	`java.util.List`	`histogram(java.lang.Object field, int classes = 10)` Calculate a histogram of values for an attribute of the Layer.
	`Layer`	`identity(Map options = [:], Layer layer2)` Calculate the identity between this Layer and another Layer.
	`java.util.List`	`interpolate(java.lang.Object field, int classes = 10, java.lang.String method = "linear")` Create a List of interpolated values for a Field
	`Layer`	`intersection(Map options = [:], Layer layer2)` Intersect this Layer with another Layer.
	`Layer`	`merge(Map options = [:], Layer otherLayer)` Merge this Layer with another Layer to create an output Layer
	`Map`	`minmax(java.lang.Object field, java.lang.Object low = null, java.lang.Object high = null)` Calculates the minimum and maximum values for an attribute of the Layer.
	`static java.lang.String`	`newname()` Generate a new name
	`void`	`plus(java.lang.Object o)` Add a Feature to the Layer
	`void`	`queueModified(Feature feature, java.lang.String name)` Add the Feature to a List of modified Features
	`protected FeatureCollection`	`readFeatures(Cursor cursor, Schema schema, int chunk)` Read Features from a Cursor in Batches.
	`Layer`	`reproject(Projection p, java.lang.String newName = newname(, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")` Reproject the Layer
	`Layer`	`reproject(Projection p, Workspace outputWorkspace, java.lang.String newName, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")` Reproject the Layer to another Layer in the given Workspace
	`Layer`	`reproject(Layer projectedLayer, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")` Reproject this Layer to another Layer that already exists.
	`protected double`	`round2(double num)`
	`protected void`	`setDefaultSymbolizer(java.lang.String geometryType)` Set the default Symbolizer based on the geometry type
	`void`	`setProj(java.lang.Object value)` Set the Layer's Projection.
	`void`	`split(Field field, Workspace workspace)` Split this Layer into sub Layers based on values taken from the Field.
	`void`	`split(Layer splitLayer, Field field, Workspace workspace)` Split this Layer into multiple Layers based on the Features from the split Layer.
	`Layer`	`symDifference(Map options = [:], Layer layer2)` Calculate the symmetric difference between this Layer and another Layer.
	`java.lang.String`	`toString()` The string representation
	`Layer`	`transform(java.lang.String name, Map definitions)` Transform this Layer into a Layer with a new name using a Map of definitions.
	`Layer`	`union(Map options = [:], Layer layer2)` Union this Layer with another Layer.
	`void`	`update(Field fld, java.lang.Object value, java.lang.Object filter = null, boolean isScript = false)` Update the values of a Field
	`void`	`update()` Update all modified Features whose values where changed with the Feature.set(field,value) method.
	`Layer`	`update(Map options = [:], Layer layer2)` Calculate the update between this Layer and another Layer.
	`void`	`withWriter(Map options = [:], groovy.lang.Closure c)` Add Features to a Writer within a Closure that takes a Writer ready to adding Features.

Inherited Methods Summary

Inherited Methods
Methods inherited from class	Name
`class java.lang.Object`	`java.lang.Object#wait(long, int), java.lang.Object#wait(long), java.lang.Object#wait(), java.lang.Object#equals(java.lang.Object), java.lang.Object#toString(), java.lang.Object#hashCode(), java.lang.Object#getClass(), java.lang.Object#notify(), java.lang.Object#notifyAll()`

- Field Detail
  - protected static final FilterFactory2 filterFactory
    
    The FilterFactory2 for creating Filters
- Property Detail
  - FeatureSource<SimpleFeatureType, SimpleFeature> fs
    
    The GeoTools FeatureSource
  - java.lang.String name
    
    The name
  - Projection proj
  - Schema schema
    
    The Schema
  - Style style
    
    The Style
  - Workspace workspace
    
    The Workspace
- Constructor Detail
  - Layer(FeatureSource<SimpleFeatureType, SimpleFeature> fs)
    
    Create a new Layer from a GeoTools FeatureSource
    Parameters:
    fs - The GeoTools FeatureSource
  - Layer(Layer layer)
    
    Create a new Layer from an existing Layer
    Parameters:
    layer - Another Layer
  - Layer(java.lang.String name, Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs, Schema schema)
    
    Create a new Layer from a name, Workspace, FeatureSource, and Schema
    Parameters:
    name - The Layer's name
    workspace - The Workspace
    fs - The GeoTools FeatureSource
    schema - The GeoScript Schema
  - Layer(Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs)
    
    Create a new Layer from a Workspace and FeatureSource
    Parameters:
    workspace - The Workspace
    fs - The GeoTools FeatureSource
  - Layer(java.lang.String name, Workspace workspace)
    
    Create a new Layer from a name and Workspace
    Parameters:
    name - The Layer's name
    workspace - The Workspace
  - Layer(java.lang.String name, Schema schema)
    
    Create a new Layer with a name in the Memory Workspace
    Parameters:
    name - The Layer's name
    schema - The Schema
  - Layer()
    
    Create a new Layer with a default name, Schema in the Memory Workspace
  - Layer(java.lang.String name)
    
    Create a new Layer with the given name, a simple Schema with just a Geometry Field in the Memory Workspace
  - Layer(FeatureCollection fc)
    
    Create a new Layer from a GeoTools FeatureCollection.
    Parameters:
    fc - The GeoTools FeatureCollection
  - Layer(java.lang.String name, FeatureCollection fc)
    
    Create a new Layer from a GeoTools FeatureCollection
    Parameters:
    name - The name of the new Layer
    fc - The GeoTools FeatureCollection
- Method Detail
  - void add(java.lang.Object o)
    
    Add a Feature to the Layer
    Parameters:
    o - The Feature, the List of Features, or a List/Map of values
  - Bounds bounds(java.lang.Object filter = null)
    
    Get the Bounds of the Features in the Layer
    Parameters:
    filer - The Filter or Filter String to limit the Features used to construct the bounds. Defaults to null.
    Returns:
    The Bounds of the Features in the Layer
  - Bounds bounds(Map options)
    
    Get the Bounds of Layer using named parameters
    Parameters:
    options - The named parameters
    
    filter = A Filter or a CQL String
    
    params = A Map of parameters to plugin into a query
    Returns:
    The Bounds
  - Layer buffer(Map options = [:], double distance)
    
    Buffer all of the Features in the this Layer.
    Parameters:
    options - The Map of options which can include outWorkspace and outLayer
    
    outLayer = The output Layer's name
    
    outWorkspace = The output Workspace
    
    quadrantSegments = The number of quadrant segments
    
    capStyle = The end cap style
    
    singleSided = Whether the buffer should be single sided or not
    distance - The buffer distance
    Returns:
    A Layer with the buffered Features
  - Layer buffer(Map options = [:], Expression distance)
    
    Buffer all of the Features in the this Layer.
    Parameters:
    options - The Map of options which can include outWorkspace and outLayer
    
    outLayer = The output Layer's name
    
    outWorkspace = The output Workspace
    
    quadrantSegments = The number of quadrant segments
    
    capStyle = The end cap style
    
    singleSided = Whether the buffer should be single sided or not
    distance - An Expression that represents the buffer distance (can be a Literal, Function, or Property)
    Returns:
    A Layer with the buffered Features
  - Layer clip(Map options = [:], Layer clipLayer)
    
    Clip this Layer by another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_clipLayer.name_clipped)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    clipLayer - The clip Layer
    Returns:
    The clipped Layer
  - java.util.List collectFromFeature(java.lang.Object filter = null, groovy.lang.Closure closure)
    
    Collect values from the Features of a Layer
    Parameters:
    filter - The Filter which is optional
    closure - A Closure which takes a Feature and returns a value
  - java.util.List collectFromFeature(Map options, groovy.lang.Closure closure)
    
    Collect values from the Features of a Layer
    Parameters:
    options - The named parameters *
    
    filter = The Filter or Filter String to limit the Features. Defaults to null.
    
    sort = A List of Lists that define the sort order [[Field or Field name, "ASC" or "DESC"],...]. Not all Layers support sorting!
    
    max= The maximum number of Features to include in the Cursor
    
    start = The index of the record to start the cursor at. Together with maxFeatures this simulates paging. Not all Layers support the start index and paging!
    
    fields = A List of Fields or Field names to include. Used to select only a subset of Fields.
    
    params = A Map of parameters to plug into the query.
    closure - The Closure which takes a Feature and returns a value
    Returns:
  - int count(java.lang.Object filter = null)
    
    Count the number of Features in the layer
    Parameters:
    filer - The Filter or Filter String to limit the number of Features counted. Defaults to null.
    Returns:
    The number of Features in the Layer
  - int count(Map options)
    
    Count the number of Features using named parameters
    Parameters:
    options - The named parameters
    
    filter = A Filter or CQL String
    
    params = A Map of parameters based to the query
    Returns:
    The number of Features in the Layer
  - void delete(java.lang.Object filter = null)
    
    Delete Features from the Layer
    Parameters:
    filer - The Filter or Filter String to limit the Features to delete. Defaults to null.
  - Layer dissolve(Map options = [:], Field field)
    
    Dissolve the Features of a Layer by a Field.
    Parameters:
    options - A Map of options that can include outLayer, outWorkspace, idFieldName, and countFieldName
    layer - The input Layer
    field - The Field
    Returns:
    The output Layer
  - Layer dissolve(Map options = [:])
    
    Dissolve intersecting Features of a Layer.
    Parameters:
    options - A Map of options that can include outLayer, outWorkspace, idFieldName, and countFieldName
    
    outLayer = The output Layer's name
    
    outWorkspace = The output Workspace
    
    idFieldName = The ID Field name (id)
    
    countyFieldName = The count Field name (count)
    layer - The input Layer
    field - The Field
    Returns:
    The output Layer
  - void eachFeature(java.lang.Object filter = null, groovy.lang.Closure closure)
    
    Call the Closure for each Feature optionally filtered by the Filter
    Parameters:
    filter - The Filter which is optional
    closure - A Closure which takes a Feature
  - void eachFeature(Map options, groovy.lang.Closure closure)
    
    Call the Closure for each Feature.
    Parameters:
    options - The named parameters *
    
    filter = The Filter or Filter String to limit the Features. Defaults to null.
    
    sort = A List of Lists that define the sort order [[Field or Field name, "ASC" or "DESC"],...]. Not all Layers support sorting!
    
    max= The maximum number of Features to include in the Cursor
    
    start = The index of the record to start the cursor at. Together with maxFeatures this simulates paging. Not all Layers support the start index and paging!
    
    fields = A List of Fields or Field names to include. Used to select only a subset of Fields.
    
    params = A Map of parameters to plug into the query.
    closure - The Closure which takes a Feature
  - Layer erase(Map options = [:], Layer layer2)
    
    Erase this Layer with another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_erase)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    layer2 - The second Layer
    Returns:
    The output Layer
  - Layer filter(java.lang.Object filter = null, java.lang.String newName = newname()
    
    Filer the Layer.
    Parameters:
    filter - A Filter or Filter String used to limit the number of Features returned in the new Layer
    newName - The name of the new Layer (defaults to a default new name)
    Returns:
    A new Layer in the same workspace
  - Feature first(Map options = [:])
    
    Get the first Feature that matches
    Parameters:
    options - Named parameters
    
    filter = A geoscript.filter.Filter or CQL String
    
    sort = A String (FIELD ASC | DESC) or List of Strings
    
    params = A Map of parameters to plugin into the query
    Returns:
  - Bounds getBounds()
    
    Get the Bounds of the Features in the Layer
    Returns:
    The Bounds of the Features in the Layer
  - int getCount()
    
    Count the number of Features in the layer
    Returns:
    The number of Features in the Layer
  - Cursor getCursor(Map options)
    
    Get a Cursor over the Features of the Layer using named parameters.
    Parameters:
    options. - The Map of named parameters can include:
    
    filter = The Filter or Filter String to limit the Features. Defaults to null.
    
    sort = A List of Lists that define the sort order [[Field or Field name, "ASC" or "DESC"],...]. Not all Layers support sorting!
    
    max= The maximum number of Features to include in the Cursor
    
    start = The index of the record to start the cursor at. Together with maxFeatures this simulates paging. Not all Layers support the start index and paging!
    
    fields = A List of Fields or Field names to include. Used to select only a subset of Fields.
    
    params = A Map of parameters to plug into the query.
    Returns:
    A Cursor
  - Cursor getCursor(java.lang.Object filter = null, java.util.List sort = null, int max = -1, int start = -1, java.util.List fields = null, java.lang.Object sourceProj = null, java.lang.Object destProj = null, java.lang.Object params = null)
    
    Get a Cursor over the Features of the Layer.
    Parameters:
    filter - The Filter or Filter String to limit the Features. Defaults to null.
    sort - A List of Lists [[Field or Field name, "ASC" or "DESC"],...] or a List of Strings ["name DESC", "price ASC"] that define the sort order. Not all Layers support sorting!
    max - The maximum number of Features to include in the Cursor
    start - The zero based index of the record to start the cursor at. Together with maxFeatures this simulates paging. Not all Layers support the start index and paging!
    fields - A List of Fields or Field names to include. Used to select only a subset of Fields.
    params - A Map of parameters to plug into the query.
    Returns:
    A Cursor
  - java.util.List<Feature> getFeatures(java.lang.Object filter = null, groovy.lang.Closure transform = null, java.util.List sort = null, Map params = null)
    
    Get a List of Features
    Parameters:
    filer - The Filter or Filter String to limit the Features used to construct the bounds. Defaults to null.
    transform - The Closure used to modify the Features. Defaults to null.
    sort - A List of Lists that define the sort order [[Field or Field name, "ASC" or "DESC"],...]. Not all Layers support sorting!
    params - A Map of parameters to plug into the query.
    Returns:
    A List of Features
  - java.util.List<Feature> getFeatures(Map options)
    
    Get a List of Features
    Parameters:
    options - The named parameters
    
    transform = The Closure used to modify the Features takes a Feature and returns a Feature
    
    filter = The Filter or Filter String to limit the Features. Defaults to null.
    
    sort = A List of Lists that define the sort order [[Field or Field name, "ASC" or "DESC"],...]. Not all Layers support sorting!
    
    max= The maximum number of Features to include in the Cursor
    
    start = The index of the record to start the cursor at. Together with maxFeatures this simulates paging. Not all Layers support the start index and paging!
    
    fields = A List of Fields or Field names to include. Used to select only a subset of Fields.
    
    params = A Map of parameters to plug into the query.
    Returns:
    A List of Features
  - java.lang.String getFormat()
    
    Get the Workspace format
    Returns:
    The format identifying the workspace
  - java.util.List getMapLayers(Bounds bounds, java.util.List size)
    
    Get the map layers
    Returns:
  - java.lang.String getName()
    
    Get the Layer's name
    Returns:
    The Layer's name
  - Projection getProj()
    
    Get the Layer's Projection
    Returns:
    The Layer's Projection
  - Raster getRaster(java.lang.Object field, java.util.List gridSize, Bounds bounds, java.lang.String rasterName)
    
    Convert this Layer into a Raster
    Parameters:
    field - The numeric Field or Field name from which to get values
    gridSize - The grid size (width and height)
    bounds - The Bounds of the Raster
    name - The name of the Raster
    Returns:
    A Raster
  - Writer getWriter(Map options = [:])
    
    Get a Writer for this Layer
    Parameters:
    options - The named parameters
    
    batch: The number of features to write at one time (defaults to 1000)
    
    transaction: The type of transaction: null, auto or autocommit, or default. The default value depends on the type of Layer.
    Returns:
    A Writer
  - java.util.List histogram(java.lang.Object field, int classes = 10)
    
    Calculate a histogram of values for an attribute of the Layer.
    Parameters:
    field - The Field or field name
    classes - The number of classes
    Returns:
    A List of Lists for each class
  - Layer identity(Map options = [:], Layer layer2)
    
    Calculate the identity between this Layer and another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_identity)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    
    postfixAll = Whether to postfix all field names when combining schemas (defaults to false)
    
    includeDuplicates = Whether to include duplicate field names (defaults to true)
    
    maxFieldNameLength = The maximum field name length (defaults to 10 if output Workspace is Directory, otherwise there is no limit)
    layer2 - The second Layer
    Returns:
    The output Layer
  - java.util.List interpolate(java.lang.Object field, int classes = 10, java.lang.String method = "linear")
    
    Create a List of interpolated values for a Field
    Parameters:
    field - The Field of Field name
    classes - The number of classes
    method - The interpolation method: linear, exp(onential), log(arithmic)
    Returns:
    A List of values
  - Layer intersection(Map options = [:], Layer layer2)
    
    Intersect this Layer with another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_intersection)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    
    postfixAll = Whether to postfix all field names when combining schemas (defaults to false)
    
    includeDuplicates = Whether to include duplicate field names (defaults to true)
    
    maxFieldNameLength = The maximum field name length (defaults to 10 if output Workspace is Directory, otherwise there is no limit)
    layer2 - The second Layer
    Returns:
    The output Layer
  - Layer merge(Map options = [:], Layer otherLayer)
    
    Merge this Layer with another Layer to create an output Layer
    Parameters:
    options - A Map of options that can include outLayer or outWorkspace
    
    outLayer = The output Layer's name
    
    outWorkspace = The output Workspace
    
    postfixAll = Whether to add a postfix to all field names
    
    includeDuplicates = Whether to include duplicate fields
    
    maxFieldNameLength = The maximum Field name length
    otherLayer - The other layer
    Returns:
    The merged Layer
  - Map minmax(java.lang.Object field, java.lang.Object low = null, java.lang.Object high = null)
    
    Calculates the minimum and maximum values for an attribute of the Layer.
    Parameters:
    field - The Field
    low - The low/minimum value
    high - The high/maximum value
    Returns:
    A Map with mininimum (min) and maximum (max) values
  - static java.lang.String newname()
    
    Generate a new name
    Returns:
    A new Layer name
  - void plus(java.lang.Object o)
    
    Add a Feature to the Layer
    Parameters:
    o - The Feature or List/Map of values
  - void queueModified(Feature feature, java.lang.String name)
    
    Add the Feature to a List of modified Features
    Parameters:
    feature - The modified Feature
    name - The modified field name.
  - protected FeatureCollection readFeatures(Cursor cursor, Schema schema, int chunk)
    
    Read Features from a Cursor in Batches.
    Parameters:
    cursor - The Cursor
    schema - The output Schema
    chunk - The number of Features to be read
    Returns:
    A GeoTools FeatureCollection
  - Layer reproject(Projection p, java.lang.String newName = newname(, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")
    
    Reproject the Layer
    Parameters:
    p - The Projection
    newName - The new name (defaults to a default new name)
    chunk - The number of Features to reproject in one batch
    sourceProjection - The optional default source Projection if the Layer doesn't have a Projection defined
    Returns:
    The reprojected Layer
  - Layer reproject(Projection p, Workspace outputWorkspace, java.lang.String newName, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")
    
    Reproject the Layer to another Layer in the given Workspace
    Parameters:
    p - The Projection
    outputWorkspace - The output Workspace
    newName - The name of the new Layer
    chunk - The number of Features to reproject in one batch
    sourceProjection - The optional default source Projection if the Layer doesn't have a Projection defined
    Returns:
    The reprojected Layer
  - Layer reproject(Layer projectedLayer, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")
    
    Reproject this Layer to another Layer that already exists.
    Parameters:
    projectedLayer - The already created projected Layer
    chunk - The number of Features to reproject in one batch
    sourceProjection - The optional default source Projection if the Layer doesn't have a Projection defined
    Returns:
    The projected Layer
  - protected double round2(double num)
  - protected void setDefaultSymbolizer(java.lang.String geometryType)
    
    Set the default Symbolizer based on the geometry type
    Parameters:
    geometryType - The geometry type
    Returns:
    A default Symbolizer
  - void setProj(java.lang.Object value)
    
    Set the Layer's Projection.
    Parameters:
    value - The value can either be a Projection or a String
  - void split(Field field, Workspace workspace)
    
    Split this Layer into sub Layers based on values taken from the Field. The new Layers are created in the given Workspace.
    Parameters:
    field - The Field that contains the values that will be used to split the Layer
    workspace - The Workspace where the new Layers will be created
  - void split(Layer splitLayer, Field field, Workspace workspace)
    
    Split this Layer into multiple Layers based on the Features from the split Layer.
    Parameters:
    splitLayer - The split Layer whose Features are used to split this Layer into multiple Layers
    field - The Field from the split Layer used to name the new Layers
    workspace - The Workspace where the new Layers are created
  - Layer symDifference(Map options = [:], Layer layer2)
    
    Calculate the symmetric difference between this Layer and another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_symdifference)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    
    postfixAll = Whether to postfix all field names when combining schemas (defaults to false)
    
    includeDuplicates = Whether to include duplicate field names (defaults to true)
    
    maxFieldNameLength = The maximum field name length (defaults to 10 if output Workspace is Directory, otherwise there is no limit)
    layer2 - The second Layer
    Returns:
    The output Layer
  - java.lang.String toString()
    
    The string representation
    Returns:
    The string representation
  - Layer transform(java.lang.String name, Map definitions)
    
    Transform this Layer into a Layer with a new name using a Map of definitions.
    Parameters:
    name - The new name
    definitions - A Map of Definitions (key=Field name, value=Expression)
    Returns:
    A new transformed Layer
  - Layer union(Map options = [:], Layer layer2)
    
    Union this Layer with another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_union)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    
    postfixAll = Whether to postfix all field names when combining schemas (defaults to false)
    
    includeDuplicates = Whether to include duplicate field names (defaults to true)
    
    maxFieldNameLength = The maximum field name length (defaults to 10 if output Workspace is Directory, otherwise there is no limit)
    layer2 - The second Layer
    Returns:
    The unioned Layer
  - void update(Field fld, java.lang.Object value, java.lang.Object filter = null, boolean isScript = false)
    
    Update the values of a Field
    Parameters:
    fld - The Field whose values will be updated
    value - Either a static value, a Closure that takes a Feature and return an Object, an Expression, or a Groovy Script (if isScript is true)
    filter - The Filter to limit the Features that will be updated
    isScript - A flag for whether the value is a Groovy script or not (defaults to false). If the value is a script, it can access the Feature as variable f and the counter as variable c.
  - void update()
    
    Update all modified Features whose values where changed with the Feature.set(field,value) method.
  - Layer update(Map options = [:], Layer layer2)
    
    Calculate the update between this Layer and another Layer.
    Parameters:
    options - Named parameters
    
    outLayer = The name of the output Layer (defaults to this.layer.name_layer2.name_update)
    
    outWorkspace = The output Workspace (defaults to the Memory Workspace)
    layer2 - The second Layer
    Returns:
    The output Layer
  - void withWriter(Map options = [:], groovy.lang.Closure c)
    
    Add Features to a Writer within a Closure that takes a Writer ready to adding Features.
    Parameters:
    options - The named parameters
    
    batch: The number of features to write at one time (defaults to 1000)
    
    transaction: The type of transaction: null, auto or autocommit, or default. The default value depends on the type of Layer.
    c - A Closure which takes one parameter, a Writer

Summary:
Field
Property
Constructor
Method

Groovy Documentation

[Groovy] Class Layer

Field Summary

Properties Summary

Constructor Summary

Methods Summary

Inherited Methods Summary

Field Detail

protected static final FilterFactory2 filterFactory

Property Detail

FeatureSource<SimpleFeatureType, SimpleFeature> fs

java.lang.String name

Projection proj

Schema schema

Style style

Workspace workspace

Constructor Detail

Layer(FeatureSource<SimpleFeatureType, SimpleFeature> fs)

Layer(Layer layer)

Layer(java.lang.String name, Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs, Schema schema)

Layer(Workspace workspace, FeatureSource<SimpleFeatureType, SimpleFeature> fs)

Layer(java.lang.String name, Workspace workspace)

Layer(java.lang.String name, Schema schema)

Layer()

Layer(java.lang.String name)

Layer(FeatureCollection fc)

Layer(java.lang.String name, FeatureCollection fc)

Method Detail

void add(java.lang.Object o)

Bounds bounds(java.lang.Object filter = null)

Bounds bounds(Map options)

Layer buffer(Map options = [:], double distance)

Layer buffer(Map options = [:], Expression distance)

Layer clip(Map options = [:], Layer clipLayer)

java.util.List collectFromFeature(java.lang.Object filter = null, groovy.lang.Closure closure)

java.util.List collectFromFeature(Map options, groovy.lang.Closure closure)

int count(java.lang.Object filter = null)

int count(Map options)

void delete(java.lang.Object filter = null)

Layer dissolve(Map options = [:], Field field)

Layer dissolve(Map options = [:])

void eachFeature(java.lang.Object filter = null, groovy.lang.Closure closure)

void eachFeature(Map options, groovy.lang.Closure closure)

Layer erase(Map options = [:], Layer layer2)

Layer filter(java.lang.Object filter = null, java.lang.String newName = newname()

Feature first(Map options = [:])

Bounds getBounds()

int getCount()

Cursor getCursor(Map options)

Cursor getCursor(java.lang.Object filter = null, java.util.List sort = null, int max = -1, int start = -1, java.util.List fields = null, java.lang.Object sourceProj = null, java.lang.Object destProj = null, java.lang.Object params = null)

java.util.List<Feature> getFeatures(java.lang.Object filter = null, groovy.lang.Closure transform = null, java.util.List sort = null, Map params = null)

java.util.List<Feature> getFeatures(Map options)

java.lang.String getFormat()

java.util.List getMapLayers(Bounds bounds, java.util.List size)

java.lang.String getName()

Projection getProj()

Raster getRaster(java.lang.Object field, java.util.List gridSize, Bounds bounds, java.lang.String rasterName)

Writer getWriter(Map options = [:])

java.util.List histogram(java.lang.Object field, int classes = 10)

Layer identity(Map options = [:], Layer layer2)

java.util.List interpolate(java.lang.Object field, int classes = 10, java.lang.String method = "linear")

Layer intersection(Map options = [:], Layer layer2)

Layer merge(Map options = [:], Layer otherLayer)

Map minmax(java.lang.Object field, java.lang.Object low = null, java.lang.Object high = null)

static java.lang.String newname()

void plus(java.lang.Object o)

void queueModified(Feature feature, java.lang.String name)

protected FeatureCollection readFeatures(Cursor cursor, Schema schema, int chunk)

Layer reproject(Projection p, java.lang.String newName = newname(, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")

Layer reproject(Projection p, Workspace outputWorkspace, java.lang.String newName, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")

Layer reproject(Layer projectedLayer, int chunk = 1000, Projection sourceProjection = new Projection("EPSG:4326")

protected double round2(double num)

protected void setDefaultSymbolizer(java.lang.String geometryType)

void setProj(java.lang.Object value)

void split(Field field, Workspace workspace)

void split(Layer splitLayer, Field field, Workspace workspace)

Layer symDifference(Map options = [:], Layer layer2)

java.lang.String toString()

Layer transform(java.lang.String name, Map definitions)

Layer union(Map options = [:], Layer layer2)

void update(Field fld, java.lang.Object value, java.lang.Object filter = null, boolean isScript = false)