Package org.jfree.report.data

Class GlobalView

java.lang.Object
org.jfree.report.data.GlobalView
All Implemented Interfaces:
DataRow, DataSet
public final class GlobalView extends 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

  • Method Details

    • createView

      public static GlobalView createView()

    • putField

      public void putField(String name, 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

    • get

      public 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, the getValue() method is called and for columns from the tablemodel the tablemodel method getValueAt(row, column) gets called.
      Specified by:
      get in interface DataRow
      Specified by:
      get in interface DataSet
      Parameters:
      col - the item index.
      Returns:
      the value.
      Throws:
      IllegalStateException - if the datarow detected a deadlock.
      DataSourceException - if an error occured.

    • get

      public Object get(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, the getValue() method is called and for columns from the tablemodel the tablemodel method getValueAt(row, column) gets called.
      Specified by:
      get in interface DataRow
      Parameters:
      col - the item index.
      Returns:
      the value.
      Throws:
      IllegalStateException - if the datarow detected a deadlock.
      DataSourceException - if an error occured.

    • getColumnName

      public String getColumnName(int col)
      Returns the name of the column, expression or function. For columns from the tablemodel, the tablemodels getColumnName method is called. For functions, expressions and report properties the assigned name is returned.
      Specified by:
      getColumnName in interface DataRow
      Specified by:
      getColumnName in interface DataSet
      Parameters:
      col - the item index.
      Returns:
      the name.

    • getColumnCount

      public int getColumnCount()
      Returns the number of columns, expressions and functions and marked ReportProperties in the report.
      Specified by:
      getColumnCount in interface DataRow
      Specified by:
      getColumnCount in interface DataSet
      Returns:
      the item count.

    • getFlags

      public DataFlags getFlags(String col)
      Description copied from interface: DataRow
      Queries lowlevel meta-data for the current value of the specified column.
      Specified by:
      getFlags in interface DataRow
      Parameters:
      col - the colum for which to query the meta-data flags
      Returns:
      the dataflag collection for the value in the named column

    • getFlags

      public DataFlags getFlags(int col)
      Description copied from interface: DataRow
      Queries lowlevel meta-data for the current value of the specified column.
      Specified by:
      getFlags in interface DataRow
      Parameters:
      col - the colum for which to query the meta-data flags
      Returns:
      the dataflag collection for the value in the specified column

    • derive

      public GlobalView derive()

    • advance

      public GlobalView advance()

    • removeColumn

      public void removeColumn(String name)
      Note: Dont remove the column. It will stay around here as long as the process lives.
      Parameters:
      name -