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## org.maltparser.core.feature.map
Class MergeFeature

    java.lang.Object
      org.maltparser.core.feature.map.MergeFeature

All Implemented Interfaces:
  FeatureFunction, FeatureMapFunction, Function

    public class MergeFeature

extends Object
implements FeatureMapFunction

Author:
  Johan Hall

Field Summary
`protected ColumnDescription` | `column`
`protected DataFormatInstance` | `dataFormatInstance`
`protected FeatureFunction` | `firstFeature`
`protected FeatureFunction` | `secondFeature`
`protected SingleFeatureValue` | `singleFeatureValue`
`protected SymbolTable` | `table`

Constructor Summary
`MergeFeature(DataFormatInstance dataFormatInstance)`

Method Summary
`boolean` | `equals(Object obj)`
`int` | `getCode(String symbol)` Returns the integer representation of the string `symbol` according to the feature function.
`ColumnDescription` | `getColumn()`
`DataFormatInstance` | `getDataFormatInstance()`
`FeatureValue` | `getFeatureValue()` Returns the feature value
`FeatureFunction` | `getFirstFeature()`
`Class<?>[]` | `getParameterTypes()` Returns an array of class types used by the feature extraction system to invoke initialize with correct arguments.
`FeatureFunction` | `getSecondFeature()`
`String` | `getSymbol(int code)` Returns the string representation of the integer `code` according to the feature function.
`SymbolTable` | `getSymbolTable()` Returns the symbol table used by the feature function.
`SymbolTableHandler` | `getTableHandler()`
`void` | `initialize(Object[] arguments)` Initialize the feature function
`protected void` | `setColumn(ColumnDescription column)`
`void` | `setDataFormatInstance(DataFormatInstance dataFormatInstance)`
`void` | `setFirstFeature(FeatureFunction firstFeature)`
`void` | `setSecondFeature(FeatureFunction secondFeature)`
`void` | `setSymbolTable(SymbolTable table)`
`String` | `toString()`
`void` | `update()` Cause the feature function to update the feature value.
`void` | `updateCardinality()`

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

Field Detail

### firstFeature

    protected FeatureFunction firstFeature

### secondFeature

    protected FeatureFunction secondFeature

### dataFormatInstance

    protected DataFormatInstance dataFormatInstance

### table

    protected SymbolTable table

### column

    protected ColumnDescription column

### singleFeatureValue

    protected SingleFeatureValue singleFeatureValue

Constructor Detail

### MergeFeature

    public MergeFeature(DataFormatInstance dataFormatInstance)
                 throws MaltChainedException

Throws:
  `MaltChainedException`

Method Detail

### initialize

    public void initialize(Object[] arguments)
                    throws MaltChainedException

  Description copied from interface: `Function`
  Initialize the feature function

  Specified by:
    `initialize` in interface `Function`
  Parameters:
    `arguments` - an array of arguments with the type returned by getParameterTypes()
  Throws:
    `MaltChainedException`

### update

    public void update()
                throws MaltChainedException

  Description copied from interface: `Function`
  Cause the feature function to update the feature value.

  Specified by:
    `update` in interface `Function`
  Throws:
    `MaltChainedException`

### getParameterTypes

    public Class<?>[] getParameterTypes()

  Description copied from interface: `Function`
  Returns an array of class types used by the feature extraction system to invoke initialize with correct arguments.

  Specified by:
    `getParameterTypes` in interface `Function`
  Returns:
    an array of class types

### getFeatureValue

    public FeatureValue getFeatureValue()

  Description copied from interface: `FeatureFunction`
  Returns the feature value

  Specified by:
    `getFeatureValue` in interface `FeatureFunction`
  Returns:
    the feature value

### getSymbol

    public String getSymbol(int code)
                     throws MaltChainedException

  Description copied from interface: `FeatureFunction`
  Returns the string representation of the integer `code` according to the feature function.

  Specified by:
    `getSymbol` in interface `FeatureFunction`
  Parameters:
    `code` - the integer representation of the symbol
  Returns:
    the string representation of the integer `code` according to the feature function.
  Throws:
    `MaltChainedException`

### getCode

    public int getCode(String symbol)
                throws MaltChainedException

  Description copied from interface: `FeatureFunction`
  Returns the integer representation of the string `symbol` according to the feature function.

  Specified by:
    `getCode` in interface `FeatureFunction`
  Parameters:
    `symbol` - the string representation of the symbol
  Returns:
    the integer representation of the string `symbol` according to the feature function.
  Throws:
    `MaltChainedException`

### updateCardinality

    public void updateCardinality()
                           throws MaltChainedException

  Throws:
    `MaltChainedException`

### getFirstFeature

    public FeatureFunction getFirstFeature()

### setFirstFeature

    public void setFirstFeature(FeatureFunction firstFeature)

### getSecondFeature

    public FeatureFunction getSecondFeature()

### setSecondFeature

    public void setSecondFeature(FeatureFunction secondFeature)

### getTableHandler

    public SymbolTableHandler getTableHandler()

### getSymbolTable

    public SymbolTable getSymbolTable()

  Description copied from interface: `FeatureFunction`
  Returns the symbol table used by the feature function.

  Specified by:
    `getSymbolTable` in interface `FeatureFunction`
  Returns:
    the symbol table used by the feature function.

### setSymbolTable

    public void setSymbolTable(SymbolTable table)

### getColumn

    public ColumnDescription getColumn()

### setColumn

    protected void setColumn(ColumnDescription column)

### getDataFormatInstance

    public DataFormatInstance getDataFormatInstance()

### setDataFormatInstance

    public void setDataFormatInstance(DataFormatInstance dataFormatInstance)

### equals

    public boolean equals(Object obj)

  Overrides:
    `equals` in class `Object`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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Copyright 2007-2011 Johan Hall, Jens Nilsson and Joakim Nivre.