Package org.jfree.report.data
Class GlobalView
- java.lang.Object
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- org.jfree.report.data.GlobalView
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public final class GlobalView extends java.lang.Object implements DataRow
The global view holds all *named* data columns. Expressions which have no name will not appear here. There is a slot for each name - if expressions share the same name, the last name wins. This acts as some kind of global variables heap - which allows named functions to export their values to a global space. This datarow is optimized for named access - the sequential access is only generated when absolutly needed.- Author:
- Thomas Morgner
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description GlobalView
advance()
static GlobalView
createView()
GlobalView
derive()
java.lang.Object
get(int col)
Returns the value of the expression or column in the tablemodel using the given column number as index.java.lang.Object
get(java.lang.String col)
Returns the value of the function, expression or column using its specific name.int
getColumnCount()
Returns the number of columns, expressions and functions and marked ReportProperties in the report.java.lang.String
getColumnName(int col)
Returns the name of the column, expression or function.DataFlags
getFlags(int col)
Queries lowlevel meta-data for the current value of the specified column.DataFlags
getFlags(java.lang.String col)
Queries lowlevel meta-data for the current value of the specified column.void
putField(java.lang.String name, java.lang.Object value, boolean update)
This adds the expression to the data-row and queries the expression for the first time.void
removeColumn(java.lang.String name)
Note: Dont remove the column.
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Method Detail
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createView
public static GlobalView createView()
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putField
public void putField(java.lang.String name, java.lang.Object value, boolean update) throws DataSourceException
This adds the expression to the data-row and queries the expression for the first time.- Parameters:
name
- the name of the field (cannot be null)value
- the value of that field (may be null)- Throws:
DataSourceException
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get
public java.lang.Object get(int col) throws DataSourceException
Returns the value of the expression or column in the tablemodel using the given column number as index. For functions and expressions, thegetValue()
method is called and for columns from the tablemodel the tablemodel methodgetValueAt(row, column)
gets called.- Specified by:
get
in interfaceDataRow
- Specified by:
get
in interfaceDataSet
- Parameters:
col
- the item index.- Returns:
- the value.
- Throws:
java.lang.IllegalStateException
- if the datarow detected a deadlock.DataSourceException
- if an error occured.
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get
public java.lang.Object get(java.lang.String col) throws DataSourceException
Returns the value of the function, expression or column using its specific name. The given name is translated into a valid column number and the the column is queried. For functions and expressions, thegetValue()
method is called and for columns from the tablemodel the tablemodel methodgetValueAt(row, column)
gets called.- Specified by:
get
in interfaceDataRow
- Parameters:
col
- the item index.- Returns:
- the value.
- Throws:
java.lang.IllegalStateException
- if the datarow detected a deadlock.DataSourceException
- if an error occured.
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getColumnName
public java.lang.String getColumnName(int col)
Returns the name of the column, expression or function. For columns from the tablemodel, the tablemodelsgetColumnName
method is called. For functions, expressions and report properties the assigned name is returned.- Specified by:
getColumnName
in interfaceDataRow
- Specified by:
getColumnName
in interfaceDataSet
- Parameters:
col
- the item index.- Returns:
- the name.
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getColumnCount
public int getColumnCount()
Returns the number of columns, expressions and functions and marked ReportProperties in the report.- Specified by:
getColumnCount
in interfaceDataRow
- Specified by:
getColumnCount
in interfaceDataSet
- Returns:
- the item count.
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getFlags
public DataFlags getFlags(java.lang.String col)
Description copied from interface:DataRow
Queries lowlevel meta-data for the current value of the specified column.
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getFlags
public DataFlags getFlags(int col)
Description copied from interface:DataRow
Queries lowlevel meta-data for the current value of the specified column.
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derive
public GlobalView derive()
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advance
public GlobalView advance()
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removeColumn
public void removeColumn(java.lang.String name)
Note: Dont remove the column. It will stay around here as long as the process lives.- Parameters:
name
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