java.lang.Object
- gnu.jel.DVMap
- - uk.ac.starlink.ttools.jel.JELRowReader
  - - uk.ac.starlink.ttools.jel.StarTableJELRowReader
    - - uk.ac.starlink.ttools.jel.RandomJELRowReader

```
public class RandomJELRowReader
extends StarTableJELRowReader
```
Implements JELRowReader for a random access table.

Since:

8 Feb 2005

Author:

Mark Taylor (Starlink)

Field Summary
- Fields inherited from class uk.ac.starlink.ttools.jel.StarTableJELRowReader
  PARAM_PREFIX, UCD_PREFIX, UTYPE_PREFIX
- Fields inherited from class uk.ac.starlink.ttools.jel.JELRowReader
  COLUMN_ID_CHAR, NULL_QUERY_PREFIX, OBJECT_PREFIX

Constructor Summary

Constructors
Constructor Description

RandomJELRowReader(uk.ac.starlink.table.StarTable table)
Constructs a new row reader for a random-access table.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.Object`	`evaluateAtRow(gnu.jel.CompiledExpression compEx, long lrow)`	Evaluates a given compiled expression at a given row.
`java.lang.Object`	`getCell(int icol)`	Returns the cell at a given column in the current row.
`long`	`getCurrentRow()`	Returns the current row for evaluations.
`void`	`setCurrentRow(long lrow)`	Sets the current row for evaluations.

Methods inherited from class uk.ac.starlink.ttools.jel.StarTableJELRowReader
createDescribedValueConstant, getBooleanColumnValue, getByteColumnValue, getCharColumnValue, getColumnClass, getColumnIndexByName, getConstantByName, getDoubleColumnValue, getFloatColumnValue, getIntColumnValue, getLongColumnValue, getObjectColumnValue, getShortColumnValue, getSpecialByName, getTable, getUcdRegex, getUtypeRegex, isBlank

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

- Constructor Detail
  - RandomJELRowReader
```
public RandomJELRowReader(uk.ac.starlink.table.StarTable table)
```
    Constructs a new row reader for a random-access table.
    
    Parameters:
    
    table - table object
- Method Detail
  - getCurrentRow
```
public long getCurrentRow()
```
    Returns the current row for evaluations.
    
    Specified by:
    
    getCurrentRow in class StarTableJELRowReader
    
    Returns:
    
    current row
  - setCurrentRow
```
public void setCurrentRow(long lrow)
```
    Sets the current row for evaluations.
    
    Parameters:
    
    lrow - current row
  - evaluateAtRow
```
public java.lang.Object evaluateAtRow(gnu.jel.CompiledExpression compEx,
                                      long lrow)
                               throws java.lang.Throwable
```
    Evaluates a given compiled expression at a given row. The returned value is wrapped up as an object if the result of the expression is a primitive.
    
    Parameters:
    
    compEx - compiled expression
    
    Throws:
    
    java.lang.Throwable
  - getCell
```
public java.lang.Object getCell(int icol)
                         throws java.io.IOException
```
    Returns the cell at a given column in the current row.
    
    Specified by:
    
    getCell in class StarTableJELRowReader
    
    Parameters:
    
    icol - column index
    
    Returns:
    
    cell at (getCurrentRow(),icol)
    
    Throws:
    
    java.io.IOException

Class RandomJELRowReader

Field Summary

Fields inherited from class uk.ac.starlink.ttools.jel.StarTableJELRowReader

Fields inherited from class uk.ac.starlink.ttools.jel.JELRowReader

Constructor Summary

Method Summary

Methods inherited from class uk.ac.starlink.ttools.jel.StarTableJELRowReader

Methods inherited from class uk.ac.starlink.ttools.jel.JELRowReader

Methods inherited from class java.lang.Object

Constructor Detail

RandomJELRowReader

Method Detail

getCurrentRow

setCurrentRow

evaluateAtRow

getCell