com.sun.jsfcl.data
Class DataCache.Column

java.lang.Object
  com.sun.jsfcl.data.DataCache.Column

All Implemented Interfaces:

java.util.Map.Entry, java.io.Serializable

Enclosing class:

DataCache

public class DataCache.Column

extends java.lang.Object

implements java.util.Map.Entry, java.io.Serializable

Column encapsulates the stored information about a single "column" of data, typically corresponding to a column from an individual row in an underlying relational database.

See Also:

Serialized Form

Method Summary

void	commit() If this column value has been updated, copy the current value to the original value and clear the updated state.
java.lang.String	getColumnName() Return the column name for this column as a String.
java.lang.Class	getJavaType() Return the Java type for this column.
java.lang.Object	getKey() Return the column name for this column.
java.lang.Object	getOriginal() Return the original value for this column.
java.lang.Object	getReplacement() Return the replacement value for this column, if any.
java.lang.String	getSchemaName() Return the name of the schema containing the table containing this column (if any); otherwise, return null.
int	getSqlType() Return the SQL type for this column.
java.lang.String	getTableName() Return the name of the table containing this column (if any); otherwise, return null.
java.lang.Object	getValue() Return the replacement value if this column has been updated; else return the original value.
boolean	isUpdated() Return true if the value for this column has been updated.
void	reset() Reset the updated state of this column, and throw away any reference to a replacement value.
java.lang.Object	setValue(java.lang.Object obj) If the specified value is different from the original value, save it and mark this column (and the containing row) as having been updated.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Map.Entry

equals, hashCode

Method Detail

commit

public void commit()

If this column value has been updated, copy the current value to the original value and clear the updated state. Otherwise, do nothing.

getColumnName

public java.lang.String getColumnName()

Return the column name for this column as a String. This is a type-safe alias for getKey().

getKey

public java.lang.Object getKey()

Return the column name for this column.

Specified by:

getKey in interface java.util.Map.Entry

getSqlType

public int getSqlType()

Return the SQL type for this column.

getJavaType

public java.lang.Class getJavaType()

Return the Java type for this column.

getOriginal

public java.lang.Object getOriginal()

Return the original value for this column.

getReplacement

public java.lang.Object getReplacement()

Return the replacement value for this column, if any. This is only meaningful if isUpdated() returns true.

getSchemaName

public java.lang.String getSchemaName()

Return the name of the schema containing the table containing this column (if any); otherwise, return null.

getTableName

public java.lang.String getTableName()

Return the name of the table containing this column (if any); otherwise, return null.

getValue

public java.lang.Object getValue()

Return the replacement value if this column has been updated; else return the original value.

Specified by:

getValue in interface java.util.Map.Entry

isUpdated

public boolean isUpdated()

Return true if the value for this column has been updated.

reset

public void reset()

Reset the updated state of this column, and throw away any reference to a replacement value.

setValue

public java.lang.Object setValue(java.lang.Object obj)

If the specified value is different from the original value, save it and mark this column (and the containing row) as having been updated. Otherwise, take no action.

Specified by:

setValue in interface java.util.Map.Entry

Parameters:

obj - Replacement value for this column