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## org.apache.fop.complexscripts.fonts
Class GlyphTable.UseSpec

    java.lang.Object
      org.apache.fop.complexscripts.fonts.GlyphTable.UseSpec

All Implemented Interfaces:
  java.lang.Comparable

Enclosing class:
  GlyphTable

    public static class GlyphTable.UseSpec

extends java.lang.Object
implements java.lang.Comparable

The `UseSpec` class comprises a lookup table reference and the feature that selected the lookup table.

Constructor Summary
`GlyphTable.UseSpec(GlyphTable.LookupTable lookupTable, java.lang.String feature)` Construct a glyph lookup table use specification.

Method Summary
`int` | `compareTo(java.lang.Object o)`
`boolean` | `equals(java.lang.Object o)`
`java.lang.String` | `getFeature()`
`GlyphTable.LookupTable` | `getLookupTable()`
`int` | `hashCode()`
`boolean` | `position(GlyphSequence gs, java.lang.String script, java.lang.String language, int fontSize, int[] widths, int[][] adjustments, ScriptContextTester sct)` Perform positioning processing using this use specification's lookup table.
`GlyphSequence` | `substitute(GlyphSequence gs, java.lang.String script, java.lang.String language, ScriptContextTester sct)` Perform substitution processing using this use specification's lookup table.

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

Constructor Detail

### GlyphTable.UseSpec

    public GlyphTable.UseSpec(GlyphTable.LookupTable lookupTable,
                              java.lang.String feature)

  Construct a glyph lookup table use specification.

  Parameters:
    `lookupTable` - a glyph lookup table
    `feature` - a feature that caused lookup table selection

Method Detail

### getLookupTable

    public GlyphTable.LookupTable getLookupTable()

  Returns:
    the lookup table

### getFeature

    public java.lang.String getFeature()

  Returns:
    the feature that selected this lookup table

### substitute

    public GlyphSequence substitute(GlyphSequence gs,
                                    java.lang.String script,
                                    java.lang.String language,
                                    ScriptContextTester sct)

  Perform substitution processing using this use specification's lookup table.

  Parameters:
    `gs` - an input glyph sequence
    `script` - a script identifier
    `language` - a language identifier
    `sct` - a script specific context tester (or null)
  Returns:
    the substituted (output) glyph sequence

### position

    public boolean position(GlyphSequence gs,
                            java.lang.String script,
                            java.lang.String language,
                            int fontSize,
                            int[] widths,
                            int[][] adjustments,
                            ScriptContextTester sct)

  Perform positioning processing using this use specification's lookup table.

  Parameters:
    `gs` - an input glyph sequence
    `script` - a script identifier
    `language` - a language identifier
    `fontSize` - size in device units
    `widths` - array of default advancements for each glyph in font
    `adjustments` - accumulated adjustments array (sequence) of 4-tuples of placement [PX,PY] and advance [AX,AY] adjustments, in that order, with one 4-tuple for each element of glyph sequence
    `sct` - a script specific context tester (or null)
  Returns:
    true if some adjustment is not zero; otherwise, false

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `java.lang.Object`

### equals

    public boolean equals(java.lang.Object o)

  Overrides:
    `equals` in class `java.lang.Object`

### compareTo

    public int compareTo(java.lang.Object o)

  Specified by:
    `compareTo` in interface `java.lang.Comparable`

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