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## org.apache.poi.hssf.record.formula
Class AbstractFunctionPtg

    java.lang.Object
      org.apache.poi.hssf.record.formula.Ptg
          org.apache.poi.hssf.record.formula.OperationPtg
              org.apache.poi.hssf.record.formula.AbstractFunctionPtg

Direct Known Subclasses:
  FuncPtg, FuncVarPtg

public abstract class AbstractFunctionPtg
extends OperationPtg

This class provides the base functionality for Excel sheet functions There are two kinds of function Ptgs - tFunc and tFuncVar Therefore, this class will have ONLY two subclasses

Author:
  Avik Sengupta, Andrew C. Oliver (acoliver at apache dot org)

Field Summary
`static java.lang.String` | `ATTR_NAME`
`protected byte` | `field_1_num_args`
`protected short` | `field_2_fnc_index`
`protected static java.lang.Object[][]` | `functionData`
`static short` | `INDEX_EXTERNAL`
`protected byte[]` | `paramClass`
`protected byte` | `returnClass`

Fields inherited from class org.apache.poi.hssf.record.formula.OperationPtg
`TYPE_BINARY, TYPE_FUNCTION, TYPE_UNARY`

Fields inherited from class org.apache.poi.hssf.record.formula.Ptg
`CLASS_ARRAY, CLASS_REF, CLASS_VALUE, ptgClass`

Constructor Summary
`AbstractFunctionPtg()`

Method Summary
`byte` | `getDefaultOperandClass()`
`short` | `getFunctionIndex()`
`java.lang.String` | `getName()`
`byte` | `getParameterClass(int index)`
`abstract int` | `getSize()`
`int` | `getType()`
`protected short` | `lookupIndex(java.lang.String name)`
`protected java.lang.String` | `lookupName(short index)`
`java.lang.String` | `toFormulaString(java.lang.String[] operands)` returns a string representation of the operations the length of the input array should equal the number returned by
`java.lang.String` | `toFormulaString(Workbook book)` return a string representation of this token alone
`java.lang.String` | `toString()` Overridden toString method to ensure object hash is not printed.
`abstract void` | `writeBytes(byte[] array, int offset)` write this Ptg to a byte array

Methods inherited from class org.apache.poi.hssf.record.formula.OperationPtg
`getNumberOfOperands`

Methods inherited from class org.apache.poi.hssf.record.formula.Ptg
`clone, createPtg, getBytes, getPtgClass, setClass, toDebugString`

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

Field Detail

### ATTR_NAME

    public static final java.lang.String ATTR_NAME

See Also:
  Constant Field Values

### INDEX_EXTERNAL

    public static final short INDEX_EXTERNAL

See Also:
  Constant Field Values

### functionData

    protected static java.lang.Object[][] functionData

### returnClass

    protected byte returnClass

### paramClass

    protected byte[] paramClass

### field_1_num_args

    protected byte field_1_num_args

### field_2_fnc_index

    protected short field_2_fnc_index

Constructor Detail

### AbstractFunctionPtg

    public AbstractFunctionPtg()

Method Detail

### toString

    public java.lang.String toString()

  Description copied from class: `Ptg`
  Overridden toString method to ensure object hash is not printed. This helps get rid of gratuitous diffs when comparing two dumps Subclasses may output more relevant information by overriding this method

  Overrides:
    `toString` in class `Ptg`

### getType

    public int getType()

  Specified by:
    `getType` in class `OperationPtg`

### getFunctionIndex

    public short getFunctionIndex()

### getName

    public java.lang.String getName()

### toFormulaString

    public java.lang.String toFormulaString(Workbook book)

  Description copied from class: `Ptg`
  return a string representation of this token alone

  Specified by:
    `toFormulaString` in class `Ptg`

### toFormulaString

    public java.lang.String toFormulaString(java.lang.String[] operands)

  Description copied from class: `OperationPtg`
  returns a string representation of the operations the length of the input array should equal the number returned by

  Specified by:
    `toFormulaString` in class `OperationPtg`
  See Also:
    `OperationPtg.getNumberOfOperands()`

### writeBytes

    public abstract void writeBytes(byte[] array,
                                    int offset)

  Description copied from class: `Ptg`
  write this Ptg to a byte array

  Specified by:
    `writeBytes` in class `Ptg`

### getSize

    public abstract int getSize()

  Specified by:
    `getSize` in class `Ptg`

### lookupName

    protected java.lang.String lookupName(short index)

### lookupIndex

    protected short lookupIndex(java.lang.String name)

### getDefaultOperandClass

    public byte getDefaultOperandClass()

  Overrides:
    `getDefaultOperandClass` in class `OperationPtg`

### getParameterClass

    public byte getParameterClass(int index)

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Copyright © 2003 Apache Software Foundation.