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## com.bbn.openmap.layer.vpf
Class CoverageTable

    java.lang.Object
      com.bbn.openmap.layer.vpf.CoverageTable

public class CoverageTable
extends java.lang.Object

Encapsulate a VPF coverage directory. This class handles requests that happen for a particular coverage type (political boundary, road, etc.) for a particular library (north america, browse, etc.).

Nested Class Summary
`static class` | `CoverageTable.FeatureClassRec` Feature Type Information read from VPF fca files.

Field Summary
`boolean` | `appendDot` do we need to append a '.' to three-character file names
`static char` | `AREA_FEATURETYPE`
`FeatureClassInfo[]` | `areainfo` featureclasses used for the area feature type
`int[]` | `cachedAreaSchema` hack - used by AreaTable
`int[]` | `cachedCPointSchema` hack - used by nodetable
`int[]` | `cachedEPointSchema` hack - used by nodetable
`int[]` | `cachedLineSchema` hack - used by EdgeTable
`int[]` | `cachedTextSchema` hack - used by TextTable
`protected CoverageAttributeTable` | `cat` Need this in case we have to go from the coverage type->feature type->tile
`static int[]` | `charVDTschemalength` expected schema lengths for char.vdt files
`static char[]` | `charVDTschematype` expected schema types for char.vdt files
`static char` | `COMPLEX_FEATURETYPE`
`java.lang.String` | `covtype` our coverage type - such as "po", "bnd", "hydro"
`static char` | `CPOINT_FEATURETYPE`
`FeatureClassInfo[]` | `cpointinfo` featureclasses used for the connected node feature type
`boolean` | `doAntarcticaWorkaround` hackage for the antactica polygon in DCW browse coverage
`static char` | `EDGE_FEATURETYPE`
`static char` | `EPOINT_FEATURETYPE`
`FeatureClassInfo[]` | `epointinfo` featureclasses used for the entity node feature type
`protected java.util.Hashtable` | `featureTypeInfo`
`protected java.util.Hashtable` | `featureTypes` Feature classes to look up FeatureClassInfo via feature name.
`static int[]` | `intVDTschemalength` expected schema lengths for int.vdt files
`static char[]` | `intVDTschematype` expected schema types for int.vdt files
`FeatureClassInfo[]` | `lineinfo` featureclasses used for the line feature type
`static char` | `SKIP_FEATURETYPE`
`protected java.lang.String` | `tablepath` the directory for our coverage type
`static char` | `TEXT_FEATURETYPE`
`FeatureClassInfo[]` | `textinfo` featureclasses used for the text feature type
`static char` | `UPOINT_FEATURETYPE`
`static java.lang.String[]` | `VDTColumnNames` required column names for char.vdt and int.vdt files

Constructor Summary
`CoverageTable(java.lang.String path, java.lang.String covtype)` Construct a CoverageTable object.
`CoverageTable(java.lang.String path, java.lang.String covtype, CoverageAttributeTable cat)` Construct a CoverageTable object.

Method Summary
`boolean` | `drawFeatures(VPFFeatureWarehouse warehouse, LatLonPoint ll1, LatLonPoint ll2, float dpplat, float dpplon)` This function uses the warehouse to get a list of features, and then looks in the featureList to see what feature tables handle those features.
`protected boolean` | `drawFeaturesFromThematicIndex(FeatureClassInfo fci, VPFFeatureWarehouse warehouse, com.bbn.openmap.layer.vpf.TableHolder tables, LatLonPoint ll1, LatLonPoint ll2, float dpplat, float dpplon, java.lang.String currentFeature, char featureType)` This function gets the thematic index from the FeatureClassInfo object, and uses it to look up the tiles that contain the currentFeature.
`void` | `drawTile(TileDirectory drawtd, VPFGraphicWarehouse warehouse, LatLonPoint ll1, LatLonPoint ll2, float dpplat, float dpplon)` Given a tile directory, go through the entries in the edg/fac/txt files, and send those entries to the warehouse.
`java.lang.String` | `getAreaDescription(java.util.List areaid, MutableInt retval)`
`CoverageAttributeTable` | `getCoverageAttributeTable()`
`java.lang.String` | `getCPointDescription(java.util.List pointid, MutableInt retval)`
`java.lang.String` | `getDataPath()` Get the path for this coverage
`java.lang.String` | `getDescription(java.lang.String t, java.lang.String a, int v)`
`java.lang.String` | `getDescription(java.lang.String t, java.lang.String a, java.lang.String v)`
`java.lang.String` | `getEPointDescription(java.util.List pointid, MutableInt retval)`
`java.util.Map` | `getFeatureClasses()` Returns all the feature classes
`FeatureClassInfo` | `getFeatureClassInfo(java.lang.String featureType)` Returns the FeatureClassInfo object corresponding to the feature type.
`java.util.Hashtable` | `getFeatureTypeInfo()` Returns a map from feature name to FeatureClassRec
`java.lang.String` | `getLineDescription(java.util.List lineid, MutableInt retval)`
`java.lang.String` | `getTextDescription(java.util.List textid, MutableInt retval)`
`static void` | `main(java.lang.String[] args)`
`void` | `setCoverateAttributeTable(CoverageAttributeTable cat)`
`protected char` | `whatFeatureType(VPFWarehouse warehouse, java.lang.String featureName)` Given a feature type name, figure out if the warehouse thinks it should *NOT* be drawn.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### covtype

    public final java.lang.String covtype

  our coverage type - such as "po", "bnd", "hydro"

### tablepath

    protected final java.lang.String tablepath

  the directory for our coverage type

### cachedLineSchema

    public int[] cachedLineSchema

  hack - used by EdgeTable

### cachedAreaSchema

    public int[] cachedAreaSchema

  hack - used by AreaTable

### cachedTextSchema

    public int[] cachedTextSchema

  hack - used by TextTable

### cachedEPointSchema

    public int[] cachedEPointSchema

  hack - used by nodetable

### cachedCPointSchema

    public int[] cachedCPointSchema

  hack - used by nodetable

### lineinfo

    public FeatureClassInfo[] lineinfo

  featureclasses used for the line feature type

### areainfo

    public FeatureClassInfo[] areainfo

  featureclasses used for the area feature type

### textinfo

    public FeatureClassInfo[] textinfo

  featureclasses used for the text feature type

### epointinfo

    public FeatureClassInfo[] epointinfo

  featureclasses used for the entity node feature type

### cpointinfo

    public FeatureClassInfo[] cpointinfo

  featureclasses used for the connected node feature type

### featureTypes

    protected java.util.Hashtable featureTypes

  Feature classes to look up FeatureClassInfo via feature name.

### featureTypeInfo

    protected java.util.Hashtable featureTypeInfo

### appendDot

    public boolean appendDot

  do we need to append a '.' to three-character file names

### cat

    protected CoverageAttributeTable cat

  Need this in case we have to go from the coverage type->feature type->tile

### doAntarcticaWorkaround

    public final boolean doAntarcticaWorkaround

  hackage for the antactica polygon in DCW browse coverage

### EDGE_FEATURETYPE

    public static final char EDGE_FEATURETYPE

See Also:
  Constant Field Values

### AREA_FEATURETYPE

    public static final char AREA_FEATURETYPE

See Also:
  Constant Field Values

### TEXT_FEATURETYPE

    public static final char TEXT_FEATURETYPE

See Also:
  Constant Field Values

### UPOINT_FEATURETYPE

    public static final char UPOINT_FEATURETYPE

See Also:
  Constant Field Values

### EPOINT_FEATURETYPE

    public static final char EPOINT_FEATURETYPE

See Also:
  Constant Field Values

### CPOINT_FEATURETYPE

    public static final char CPOINT_FEATURETYPE

See Also:
  Constant Field Values

### COMPLEX_FEATURETYPE

    public static final char COMPLEX_FEATURETYPE

See Also:
  Constant Field Values

### SKIP_FEATURETYPE

    public static final char SKIP_FEATURETYPE

See Also:
  Constant Field Values

### VDTColumnNames

    public static final java.lang.String[] VDTColumnNames

  required column names for char.vdt and int.vdt files

### intVDTschematype

    public static final char[] intVDTschematype

  expected schema types for int.vdt files

### intVDTschemalength

    public static final int[] intVDTschemalength

  expected schema lengths for int.vdt files

### charVDTschematype

    public static final char[] charVDTschematype

  expected schema types for char.vdt files

### charVDTschemalength

    public static final int[] charVDTschemalength

  expected schema lengths for char.vdt files

Constructor Detail

### CoverageTable

    public CoverageTable(java.lang.String path,
                         java.lang.String covtype)

  Construct a CoverageTable object. Data is expected to be in a directory called path/covtype.

Parameters:
  `path` - the path to the parent directory of where our data resides
  `covtype` - the subdirectory name for the coverage data

### CoverageTable

    public CoverageTable(java.lang.String path,
                         java.lang.String covtype,
                         CoverageAttributeTable cat)

  Construct a CoverageTable object. Data is expected to be in a directory called path/covtype.

Parameters:
  `path` - the path to the parent directory of where our data resides
  `covtype` - the subdirectory name for the coverage data
  `cat` - the CoverageAttributeTable reference, in case we need to backtrack the tiles through the feature tables.

Method Detail

### getDataPath

    public java.lang.String getDataPath()

  Get the path for this coverage

### getFeatureClasses

    public java.util.Map getFeatureClasses()

  Returns all the feature classes

### getFeatureClassInfo

    public FeatureClassInfo getFeatureClassInfo(java.lang.String featureType)

  Returns the FeatureClassInfo object corresponding to the feature type. Returns null if the featureType doesn't exist.

  Parameters:
    `featureType` - the name of the feature to get
  Returns:
    the feature class object for the feature type

### getDescription

    public java.lang.String getDescription(java.lang.String t,
                                           java.lang.String a,
                                           int v)

### getDescription

    public java.lang.String getDescription(java.lang.String t,
                                           java.lang.String a,
                                           java.lang.String v)

### getLineDescription

    public java.lang.String getLineDescription(java.util.List lineid,
                                               MutableInt retval)

### getTextDescription

    public java.lang.String getTextDescription(java.util.List textid,
                                               MutableInt retval)

### getEPointDescription

    public java.lang.String getEPointDescription(java.util.List pointid,
                                                 MutableInt retval)

### getCPointDescription

    public java.lang.String getCPointDescription(java.util.List pointid,
                                                 MutableInt retval)

### getAreaDescription

    public java.lang.String getAreaDescription(java.util.List areaid,
                                               MutableInt retval)

### setCoverateAttributeTable

    public void setCoverateAttributeTable(CoverageAttributeTable cat)

### getCoverageAttributeTable

    public CoverageAttributeTable getCoverageAttributeTable()

### drawTile

    public void drawTile(TileDirectory drawtd,
                         VPFGraphicWarehouse warehouse,
                         LatLonPoint ll1,
                         LatLonPoint ll2,
                         float dpplat,
                         float dpplon)

  Given a tile directory, go through the entries in the edg/fac/txt files, and send those entries to the warehouse. The warehouse will check their feature names with the feature names given to it in its properties, and eliminate the ones that it shouldn't draw.

### drawFeatures

    public boolean drawFeatures(VPFFeatureWarehouse warehouse,
                                LatLonPoint ll1,
                                LatLonPoint ll2,
                                float dpplat,
                                float dpplon)

  This function uses the warehouse to get a list of features, and then looks in the featureList to see what feature tables handle those features. Using the appropriate feature table, the function then tracks down the tile that contains that feature, and the feature index into that tile file, and then contacts the warehouse to get that feature created into a graphic.

### drawFeaturesFromThematicIndex

    protected boolean drawFeaturesFromThematicIndex(FeatureClassInfo fci,
                                                    VPFFeatureWarehouse warehouse,
                                                    com.bbn.openmap.layer.vpf.TableHolder tables,
                                                    LatLonPoint ll1,
                                                    LatLonPoint ll2,
                                                    float dpplat,
                                                    float dpplon,
                                                    java.lang.String currentFeature,
                                                    char featureType)

  This function gets the thematic index from the FeatureClassInfo object, and uses it to look up the tiles that contain the currentFeature. Then, that tile is checked to see if it is on the map. If it is, then that row in the thematic index is read to get the feature id numbers. The feature table is referenced for the feature ID number in the tile, and then the feature is drawn.

  Parameters:
    `fci` - the FeatureClassInfo (feature table)
    `warehouse` - the VPFFeatureGraphicWarehouse to use to draw the graphics.
    `ll1` - the upper left corner of the map.
    `ll2` - the lower right corner of the map.
    `dpplat` - degrees per pixel latitude direction.
    `dpplon` - degrees per pixel longitude direction.
    `currentFeature` - the feature string (roadl)
    `featureType` - the CoverageTable letter representation of the feature type.

### whatFeatureType

    protected char whatFeatureType(VPFWarehouse warehouse,
                                   java.lang.String featureName)

  Given a feature type name, figure out if the warehouse thinks it should *NOT* be drawn.

  Parameters:
    `warehouse` - the warehouse to build the graphics.
    `featureName` - the VPF name of the feature (polbndl, for example).
  Returns:
    SKIP_FEATURETYPE if the feature should not be drawn.

### getFeatureTypeInfo

    public java.util.Hashtable getFeatureTypeInfo()

  Returns a map from feature name to FeatureClassRec

### main

    public static void main(java.lang.String[] args)

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