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java.lang.Objectuk.ac.starlink.table.ColumnData
uk.ac.starlink.table.BlankColumn
public class BlankColumn
Represents a column with metadata but no data. Every cell returns null, and is not writable.
Constructor Summary | |
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BlankColumn(ColumnInfo colinfo)
Constructs a new column based on a given column metadata object. |
Method Summary | |
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java.lang.Object |
readValue(long irow)
Returns column value, which is always null. |
Methods inherited from class uk.ac.starlink.table.ColumnData |
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getColumnInfo, isWritable, setColumnInfo, storeValue |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public BlankColumn(ColumnInfo colinfo)
colinfo
- metadata for columnMethod Detail |
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public java.lang.Object readValue(long irow)
readValue
in class ColumnData
irow
- row index
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Copyright © 2004 CLRC: Central Laboratory of the Research Councils. All rights reserved. | ||||||||
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