Package uk.ac.starlink.table
Class ProgressLineStarTable
- java.lang.Object
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- uk.ac.starlink.table.WrapperStarTable
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- uk.ac.starlink.table.ProgressLineStarTable
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- All Implemented Interfaces:
java.io.Closeable
,java.lang.AutoCloseable
,StarTable
public class ProgressLineStarTable extends WrapperStarTable
A WrapperStarTable which behaves the same as its base, except that any RowSequence taken out on it will display an ASCII progress line on a terminal describing how far through the table it's got. It might decide not to do this if the table is very short.- Author:
- Mark Taylor (Starlink)
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Field Summary
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Fields inherited from class uk.ac.starlink.table.WrapperStarTable
baseTable
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Constructor Summary
Constructors Constructor Description ProgressLineStarTable(StarTable baseTable, java.io.PrintStream out)
Constructs a new ProgressLineStarTable.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description RowSequence
getRowSequence()
Returns an object which can iterate over all the rows in the table sequentially.RowSplittable
getRowSplittable()
Returns an object which can iterate over all the rows in the table, but which may also be requested to split recursively for potentially parallel processing.-
Methods inherited from class uk.ac.starlink.table.WrapperStarTable
checkedLongToInt, close, getBaseTable, getCell, getColumnAuxDataInfos, getColumnCount, getColumnInfo, getName, getParameterByName, getParameters, getRow, getRowAccess, getRowCount, getURL, isRandom, setName, setParameter, setURL, toString
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Constructor Detail
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ProgressLineStarTable
public ProgressLineStarTable(StarTable baseTable, java.io.PrintStream out)
Constructs a new ProgressLineStarTable.- Parameters:
baseTable
- the base tableout
- stream on which progress will be written - this should preferably be terminal-like, since it's going to have things like carriage-returns ('\r') written to it
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Method Detail
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getRowSequence
public RowSequence getRowSequence() throws java.io.IOException
Description copied from interface:StarTable
Returns an object which can iterate over all the rows in the table sequentially. Each such returned object is safe for use within a single thread, but not in general from multiple threads concurrently.- Specified by:
getRowSequence
in interfaceStarTable
- Overrides:
getRowSequence
in classWrapperStarTable
- Returns:
- new RowSequence
- Throws:
java.io.IOException
- if there is an error providing access
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getRowSplittable
public RowSplittable getRowSplittable() throws java.io.IOException
Description copied from interface:StarTable
Returns an object which can iterate over all the rows in the table, but which may also be requested to split recursively for potentially parallel processing.The return value must be non-null, and may provide splitting arrangements specially appropriate for the implementation. If this table 'wraps' an upstream table, it is usually best to base the implementation on calls to the the upstream
getRowSplittable
method, so that upstream policy about how to divide up the table is respected. However, implementations without special requirements may returnTables.getDefaultRowSplittable
(this)
.- Specified by:
getRowSplittable
in interfaceStarTable
- Overrides:
getRowSplittable
in classWrapperStarTable
- Returns:
- new RowSplittable
- Throws:
java.io.IOException
- See Also:
RowRunner
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