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## com.bbn.openmap.dataAccess.iso8211
Class DDFFieldDefinition

    java.lang.Object
      com.bbn.openmap.dataAccess.iso8211.DDFFieldDefinition

All Implemented Interfaces:
  DDFConstants

public class DDFFieldDefinition
extends java.lang.Object
implements DDFConstants

Information from the DDR defining one field. Note that just because a field is defined for a DDFModule doesn't mean that it actually occurs on any records in the module. DDFFieldDefns are normally just significant as containers of the DDFSubfieldDefinitions.

Nested Class Summary
`static class` | `DDFFieldDefinition.DataStructCode`
`static class` | `DDFFieldDefinition.DataTypeCode`

Field Summary
`protected java.lang.String` | `_arrayDescr`
`protected DDFFieldDefinition.DataStructCode` | `_data_struct_code`
`protected DDFFieldDefinition.DataTypeCode` | `_data_type_code`
`protected java.lang.String` | `_fieldName`
`protected java.lang.String` | `_formatControls`
`protected boolean` | `bRepeatingSubfields`
`protected int` | `nFixedWidth`
`protected java.util.Vector` | `paoSubfieldDefns`
`protected DDFModule` | `poModule`
`protected java.lang.String` | `pszTag`

Fields inherited from interface com.bbn.openmap.dataAccess.iso8211.DDFConstants
`DDF_FIELD_TERMINATOR, DDF_LEADER_SIZE, DDF_UNIT_TERMINATOR`

Constructor Summary
`DDFFieldDefinition()`
`DDFFieldDefinition(DDFModule poModuleIn, java.lang.String pszTagIn, byte[] pachFieldArea)`

Method Summary
`protected boolean` | `applyFormats(java.lang.String _formatControls)` This method parses the format string partially, and then applies a subfield format string to each subfield object.
`protected boolean` | `buildSubfieldDefns(java.lang.String pszSublist)` Based on the list contained in the string, build a set of subfield definitions.
`protected java.lang.String` | `expandFormat(java.lang.String pszSrc)` Given a string that contains a coded size symbol, expand it out.
`protected java.lang.String` | `extractSubstring(java.lang.String pszSrc)` Extract a substring terminated by a comma (or end of string).
`DDFSubfieldDefinition` | `findSubfieldDefn(java.lang.String pszMnemonic)` Find a subfield definition by it's mnemonic tag.
`java.lang.String` | `getDescription()` Fetch a longer descriptio of this field.
`int` | `getFixedWidth()` Get the width of this field.
`java.lang.String` | `getName()` Fetch a pointer to the field name (tag).
`int` | `getSubfieldCount()` Get the number of subfields.
`DDFSubfieldDefinition` | `getSubfieldDefn(int i)` Fetch a subfield by index.
`boolean` | `initialize(DDFModule poModuleIn, java.lang.String pszTagIn, byte[] pachFieldArea)` Initialize the field definition from the information in the DDR record.
`boolean` | `isRepeating()` Fetch repeating flag.
`void` | `setRepeating(boolean val)` this is just for an S-57 hack for swedish data
`java.lang.String` | `toString()` Write out field definition info.

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

Field Detail

### poModule

    protected DDFModule poModule

### pszTag

    protected java.lang.String pszTag

### _fieldName

    protected java.lang.String _fieldName

### _arrayDescr

    protected java.lang.String _arrayDescr

### _formatControls

    protected java.lang.String _formatControls

### bRepeatingSubfields

    protected boolean bRepeatingSubfields

### nFixedWidth

    protected int nFixedWidth

### _data_struct_code

    protected DDFFieldDefinition.DataStructCode _data_struct_code

### _data_type_code

    protected DDFFieldDefinition.DataTypeCode _data_type_code

### paoSubfieldDefns

    protected java.util.Vector paoSubfieldDefns

Constructor Detail

### DDFFieldDefinition

    public DDFFieldDefinition()

### DDFFieldDefinition

    public DDFFieldDefinition(DDFModule poModuleIn,
                              java.lang.String pszTagIn,
                              byte[] pachFieldArea)

Method Detail

### getName

    public java.lang.String getName()

  Fetch a pointer to the field name (tag).

  Returns:
    this is an internal copy and shouldn't be freed.

### getDescription

    public java.lang.String getDescription()

  Fetch a longer descriptio of this field.

  Returns:
    this is an internal copy and shouldn't be freed.

### getSubfieldCount

    public int getSubfieldCount()

  Get the number of subfields.

### getFixedWidth

    public int getFixedWidth()

  Get the width of this field. This function isn't normally used by applications.

  Returns:
    The width of the field in bytes, or zero if the field is not apparently of a fixed width.

### isRepeating

    public boolean isRepeating()

  Fetch repeating flag.

  Returns:
    true if the field is marked as repeating.

### setRepeating

    public void setRepeating(boolean val)

  this is just for an S-57 hack for swedish data

### initialize

    public boolean initialize(DDFModule poModuleIn,
                              java.lang.String pszTagIn,
                              byte[] pachFieldArea)

  Initialize the field definition from the information in the DDR record. This is called by DDFModule.open().

  Parameters:
    `poModuleIn` - DDFModule reprsenting file being read.
    `pszTagIn` - the name of this field.
    `pachFieldArea` - the data bytes in the file representing the field from the header.

### toString

    public java.lang.String toString()

  Write out field definition info. A variety of information about this field definition, and all its subfields are written out too.

### buildSubfieldDefns

    protected boolean buildSubfieldDefns(java.lang.String pszSublist)

  Based on the list contained in the string, build a set of subfield definitions.

### extractSubstring

    protected java.lang.String extractSubstring(java.lang.String pszSrc)

  Extract a substring terminated by a comma (or end of string). Commas in brackets are ignored as terminated with bracket nesting understood gracefully. If the returned string would being and end with a bracket then strip off the brackets.

  Given a string like "(A,3(B,C),D),X,Y)" return "A,3(B,C),D". Give a string like "3A,2C" return "3A".

### expandFormat

    protected java.lang.String expandFormat(java.lang.String pszSrc)

  Given a string that contains a coded size symbol, expand it out.

### applyFormats

    protected boolean applyFormats(java.lang.String _formatControls)

  This method parses the format string partially, and then applies a subfield format string to each subfield object. It in turn does final parsing of the subfield formats.

### findSubfieldDefn

    public DDFSubfieldDefinition findSubfieldDefn(java.lang.String pszMnemonic)

  Find a subfield definition by it's mnemonic tag.

  Parameters:
    `pszMnemonic` - The name of the field.
  Returns:
    The subfield pointer, or null if there isn't any such subfield.

### getSubfieldDefn

    public DDFSubfieldDefinition getSubfieldDefn(int i)

  Fetch a subfield by index.

  Parameters:
    `i` - The index subfield index. (Between 0 and GetSubfieldCount()-1)
  Returns:
    The subfield pointer, or null if the index is out of range.

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