Overview | Package | Class | Use | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

## com.bbn.openmap.layer.rpf
Class RpfTocHandler

    java.lang.Object
      com.bbn.openmap.layer.rpf.RpfTocHandler

public class RpfTocHandler
extends java.lang.Object

The RpfTocHandler knows how to read A.TOC files for RPF raster data. The A.TOC file describes the coverage found in the tree of data that accompanies it. This coverage is described as a series of rectangles describing the frame of groups of coverage, with common-scale maps, types for different CADRG zones. The RpfTocHandler can also provide a description of the frames and subframes to use for a screen with a given projection.

The RPF specification says that the frame paths and file names, from the RPF directory, should be in upper-case letters. The paths and file names are stored in the A.TOC file this way. Sometimes, however, through CDROM and downloading quirks, the paths and file names, as stored on the hard drive, are actually transferred to lower-case letters. This RpfTocHandler will check for lower case letter paths, but only for all the letters to be lower case. The frame will be marked as non-existant if some of the directories or filenames have be transformed to uppercase.

Field Summary
`protected boolean` | `aTocByteOrder`
`protected java.lang.String` | `aTocFilePath`
`protected BinaryFile` | `binFile`
`protected long` | `currencyTime`
`protected boolean` | `Dchum`
`protected boolean` | `DEBUG_RPF`
`protected boolean` | `DEBUG_RPFTOC`
`protected boolean` | `DEBUG_RPFTOCDETAIL`
`protected boolean` | `DEBUG_RPFTOCFRAMEDETAIL`
`static int` | `DEFAULT_FRAME_SPACE`
`protected java.lang.String` | `dir`
`protected RpfTocEntry[]` | `entries` The boundary rectangles in the A.TOC file.
`protected java.util.Vector` | `entryResponses` Used to return the valid entries for a coverage query.
`protected long` | `estimateDiskSpace`
`protected boolean` | `fullPathsInATOC` Flag to note whether absolute pathnames are used in the A.TOC.
`protected RpfHeader` | `head`
`protected int` | `indexRecordLength`
`static java.lang.String` | `LITTLE_RPF_TOC_FILE_NAME`
`protected RpfFileSections.RpfLocationRecord[]` | `locations`
`protected int` | `numBoundaries`
`protected long` | `numFrameIndexRecords`
`static java.lang.String` | `RPF_TOC_FILE_NAME`
`protected boolean` | `valid`

Constructor Summary
`RpfTocHandler()`
`RpfTocHandler(java.lang.String parentDir)` Should be used in situations where it is certain that this is the only A.TOC in town.
`RpfTocHandler(java.lang.String parentDir, int TOCNumber)` Used when there is more than one A.TOC being used, or where there is a possibility of that happening, like in the RPF layer.

Method Summary
`protected void` | `figureOutChartSeriesForEntries(BinaryFile binFile)` Method that looks at one frame file for each RpfTocEntry, in order to check the suffix and load the chart series information into the RpfTocEntry.
`protected int` | `getASCIIZone(float ullat, int zone)`
`java.lang.String` | `getATocFilePath()`
`java.util.List` | `getBestCoverageEntry(float ullat, float ullon, float lrlat, float lrlon, CADRG proj, RpfViewAttributes viewAtts)` Given a coordinate box and a scale, find the entry in the table of contents file with the right data.
`void` | `getCatalogCoverage(float ullat, float ullon, float lrlat, float lrlon, CADRG proj, java.lang.String chartSeriesCode, java.util.Vector coverages)` Given a coordinate box and a scale, return the entries that have coverage over the given area.
`RpfTocEntry[]` | `getEntries()` Return the list of grouped frames.
`static char` | `getHigherZone(char zone)`
`static char` | `getLowerZone(char zone)`
`static float` | `getLowerZoneExtent(char zone)`
`static char[]` | `getOkZones(float ullat, float lrlat, char zone)`
`java.io.File` | `getTocFile(java.lang.String parentDir)` Given a parent RPF directory, find the a.toc file directly inside it, as dictated by the specification.
`static float` | `getUpperZoneExtent(char zone)`
`boolean` | `hasChanged()` A way to check if the status of the A.TOC file is different, in case another one has taken its place.
`protected static boolean` | `isAboveZone(float upperLat, char zone)`
`protected static boolean` | `isBelowZone(float lowerLat, char zone)`
`boolean` | `isFullPathsInATOC()`
`static boolean` | `isOkZone(char zone, char[] okZones)`
`boolean` | `isValid()` True if the A.TOC file is readable/present/good.
`boolean` | `loadFile(java.lang.String parentDir)` Read the file and load its parameters into this object.
`protected void` | `loadFrameInformation(RpfTocEntry rpfTocEntry)` Should be called by the RpfFrameCacheHandler before any frame files are loaded from a RpfTocEntry.
`static void` | `main(java.lang.String[] args)`
`protected boolean` | `parseToc(BinaryFile binFile)`
`protected void` | `readFrameInformation(BinaryFile binFile, RpfTocEntry entry)` Reads the BinaryFile to retrieve the Frame file information for the entry.
`boolean` | `reload()` Re-read the A.TOC file in the parent directory.
`void` | `setATocFilePath(java.lang.String tocFilePath)`
`void` | `setFullPathsInATOC(boolean fullPathsInATOC)`
`static long` | `textScaleToLong(java.lang.String textScale)` Given the scale string found in the A.TOC file, decode it into a 'long' scale.
`static java.lang.String` | `translateScaleToSeries(long scale)` Util-like function that translates a long to the string representation found in the A>TOC file.

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

Field Detail

### RPF_TOC_FILE_NAME

    public static final java.lang.String RPF_TOC_FILE_NAME

See Also:
  Constant Field Values

### LITTLE_RPF_TOC_FILE_NAME

    public static final java.lang.String LITTLE_RPF_TOC_FILE_NAME

See Also:
  Constant Field Values

### DEFAULT_FRAME_SPACE

    public static final int DEFAULT_FRAME_SPACE

See Also:
  Constant Field Values

### head

    protected RpfHeader head

### aTocFilePath

    protected java.lang.String aTocFilePath

### aTocByteOrder

    protected boolean aTocByteOrder

### binFile

    protected BinaryFile binFile

### locations

    protected RpfFileSections.RpfLocationRecord[] locations

### entries

    protected RpfTocEntry[] entries

  The boundary rectangles in the A.TOC file.

### dir

    protected java.lang.String dir

### Dchum

    protected boolean Dchum

### estimateDiskSpace

    protected long estimateDiskSpace

### numBoundaries

    protected int numBoundaries

### numFrameIndexRecords

    protected long numFrameIndexRecords

### indexRecordLength

    protected int indexRecordLength

### currencyTime

    protected long currencyTime

### valid

    protected boolean valid

### entryResponses

    protected java.util.Vector entryResponses

  Used to return the valid entries for a coverage query.

### fullPathsInATOC

    protected boolean fullPathsInATOC

  Flag to note whether absolute pathnames are used in the A.TOC. Set to false, because it's not supposed to be that way, according to the specification. This is reset automatically when the A.TOC file is read. If the first two characters of the directory paths are ./, then it stays false.

### DEBUG_RPF

    protected boolean DEBUG_RPF

### DEBUG_RPFTOC

    protected boolean DEBUG_RPFTOC

### DEBUG_RPFTOCDETAIL

    protected boolean DEBUG_RPFTOCDETAIL

### DEBUG_RPFTOCFRAMEDETAIL

    protected boolean DEBUG_RPFTOCFRAMEDETAIL

Constructor Detail

### RpfTocHandler

    public RpfTocHandler()

### RpfTocHandler

    public RpfTocHandler(java.lang.String parentDir)

  Should be used in situations where it is certain that this is the only A.TOC in town.

### RpfTocHandler

    public RpfTocHandler(java.lang.String parentDir,
                         int TOCNumber)

  Used when there is more than one A.TOC being used, or where there is a possibility of that happening, like in the RPF layer. The TOC number should be unique for a certain RpfFrameProvider.

Parameters:
  `parentDir` - the RPF directory
  `TOCNumber` - a unique number to identify this TOC for a RpfFrameProvider.

Method Detail

### getTocFile

    public java.io.File getTocFile(java.lang.String parentDir)

  Given a parent RPF directory, find the a.toc file directly inside it, as dictated by the specification. Not called anymore - the BinaryFile does the searching, and can find URL and jar files.

  Parameters:
    `parentDir` - Path to the RPF directory.
  Returns:
    File

### isValid

    public boolean isValid()

  True if the A.TOC file is readable/present/good.

### hasChanged

    public boolean hasChanged()

  A way to check if the status of the A.TOC file is different, in case another one has taken its place. Handy if the A.TOC is on a CDROM drive and the disk has been swapped. Not valid anymore, with the advent of the new BinaryFile, where the file information may not be available.

### reload

    public boolean reload()

  Re-read the A.TOC file in the parent directory.

### loadFile

    public boolean loadFile(java.lang.String parentDir)

  Read the file and load its parameters into this object.

### parseToc

    protected boolean parseToc(BinaryFile binFile)

### figureOutChartSeriesForEntries

    protected void figureOutChartSeriesForEntries(BinaryFile binFile)
                                           throws java.io.IOException,
                                                  FormatException

  Method that looks at one frame file for each RpfTocEntry, in order to check the suffix and load the chart series information into the RpfTocEntry. This is needed for when the RpfTocHandler is asked for matching RpfTocEntries for a given scale and location when the chart type has been limited to a certain chart code.

  Parameters:
    `binFile` -
  Throws:
    `java.io.IOException`
    `FormatException`

### loadFrameInformation

    protected void loadFrameInformation(RpfTocEntry rpfTocEntry)

  Should be called by the RpfFrameCacheHandler before any frame files are loaded from a RpfTocEntry. The RpfFrameCacheHandler should ask the RpfTocEntry if the frames have been loaded, and call this if they have not.

### readFrameInformation

    protected void readFrameInformation(BinaryFile binFile,
                                        RpfTocEntry entry)
                                 throws java.io.IOException,
                                        FormatException

  Reads the BinaryFile to retrieve the Frame file information for the entry.

  Parameters:
    `binFile` - a valid, open BinaryFile.
    `entry` - the RpfTocEntry to fill.
  Throws:
    `java.io.IOException`
    `FormatException`

### translateScaleToSeries

    public static java.lang.String translateScaleToSeries(long scale)

  Util-like function that translates a long to the string representation found in the A>TOC file.

### textScaleToLong

    public static long textScaleToLong(java.lang.String textScale)

  Given the scale string found in the A.TOC file, decode it into a 'long' scale.

### getASCIIZone

    protected int getASCIIZone(float ullat,
                               int zone)

### getCatalogCoverage

    public void getCatalogCoverage(float ullat,
                                   float ullon,
                                   float lrlat,
                                   float lrlon,
                                   CADRG proj,
                                   java.lang.String chartSeriesCode,
                                   java.util.Vector coverages)

  Given a coordinate box and a scale, return the entries that have coverage over the given area. The chart types returned are dictated by the chartSeriesCode passed in, which must be an entry from an RpfProductInfo.seriesCode.

  Parameters:
    `ullat` - upper left latitude, in decimal degrees
    `ullon` - upper left longitude, in decimal degrees
    `lrlat` - lower right latitude, in decimal degrees
    `lrlon` - lower right longitude, in decimal degrees
    `proj` - CADRG projection describing map.
    `chartSeriesCode` - chart selection. If null, all coverage boxes fitting on the screen will be returned.
    `coverages` - a list of potential coverages
  Returns:
    a Vector of applicable RpfCoverageBoxes.

### getBestCoverageEntry

    public java.util.List getBestCoverageEntry(float ullat,
                                               float ullon,
                                               float lrlat,
                                               float lrlon,
                                               CADRG proj,
                                               RpfViewAttributes viewAtts)

  Given a coordinate box and a scale, find the entry in the table of contents file with the right data. Zone is always of the northern hemisphere, and is transformed to southern inside if needed. The box will get filled in with the correct information. The subframe description will have scaling information for the subframes to be scaled to match the scale. If proj is null, only exact matches will be found NOTE: method getZone() of the CADRG projection is only relevant (according to OpenMap documentation) when you're viewing a map type (ONC, etc) at its proper scale (i.e. 1:1mil for ONC). There was a method in RpfTocHandler that only checked a TOC for coverage if the TOC zone matched the zone of the projection. This caused gaps of coverage when viewing the maps at large scales that were different from their proper scale (e.g. viewing JNC at 1:10mil). Modified this method so that it obtains all the possible zones the current map projection could be in, and compares the TOC zones to that set. Note that this now returns a list of coverage entries instead of just one.

  Parameters:
    `ullat` - upper left latitude, in decimal degrees
    `ullon` - upper left longitude, in decimal degrees
    `lrlat` - lower right latitude, in decimal degrees
    `lrlon` - lower right longitude, in decimal degrees
    `proj` - CADRG projection describing map.
    `viewAtts` - view attributes determine chart selection.
  Returns:
    a Vector of applicable RpfCoverageBoxes.

### getOkZones

    public static char[] getOkZones(float ullat,
                                    float lrlat,
                                    char zone)

### isOkZone

    public static boolean isOkZone(char zone,
                                   char[] okZones)

### isBelowZone

    protected static boolean isBelowZone(float lowerLat,
                                         char zone)

### isAboveZone

    protected static boolean isAboveZone(float upperLat,
                                         char zone)

### getUpperZoneExtent

    public static float getUpperZoneExtent(char zone)

### getLowerZoneExtent

    public static float getLowerZoneExtent(char zone)

### getLowerZone

    public static char getLowerZone(char zone)

### getHigherZone

    public static char getHigherZone(char zone)

### getEntries

    public RpfTocEntry[] getEntries()

  Return the list of grouped frames.

### getATocFilePath

    public java.lang.String getATocFilePath()

### setATocFilePath

    public void setATocFilePath(java.lang.String tocFilePath)

### isFullPathsInATOC

    public boolean isFullPathsInATOC()

### setFullPathsInATOC

    public void setFullPathsInATOC(boolean fullPathsInATOC)

### main

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

Overview | Package | Class | Use | Tree | Deprecated | Index | Help
PREV CLASS NEXT CLASS | FRAMES NO FRAMES
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD

Copyright (C) BBNT Solutions LLC; See http://openmap.bbn.com/ for details