com.google.visualization.datasource.query
Class NegationFilter

java.lang.Object
  com.google.visualization.datasource.query.QueryFilter
      com.google.visualization.datasource.query.NegationFilter

public class NegationFilter
extends QueryFilter

A negation filter. Holds a sub-filter and negates its result, acting like the NOT operator.

Author:

Yonatan B.Y.

Constructor Summary

NegationFilter(QueryFilter subFilter)
Constructs a negation filter, with the given sub-filter.

Method Summary

boolean	equals(java.lang.Object obj)
protected java.util.List<AggregationColumn>	getAggregationColumns()
java.util.Set<java.lang.String>	getAllColumnIds() Returns all the columnIds this filter uses, in this case exactly all the columnIds that the sub-filter uses.
java.util.List<ScalarFunctionColumn>	getScalarFunctionColumns() Returns a list of all scalarFunctionColumns this filter uses, in this case the scalarFunctionColumns its sub-filter uses.
QueryFilter	getSubFilter() Returns the sub-filter associated with this NegationFilter.
int	hashCode()
boolean	isMatch(DataTable table, TableRow row) Implements isMatch (from the QueryFilter interface) by recursively calling isMatch on the sub-filter and negating the result.
java.lang.String	toQueryString() Returns a string that, when parsed by the query parser, should return an identical filter.

Methods inherited from class java.lang.Object

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

Constructor Detail

NegationFilter

public NegationFilter(QueryFilter subFilter)

Constructs a negation filter, with the given sub-filter.

Parameters:

subFilter - The sub-filter of this negation filter.

Method Detail

isMatch

public boolean isMatch(DataTable table,
                       TableRow row)

Implements isMatch (from the QueryFilter interface) by recursively calling isMatch on the sub-filter and negating the result.

Specified by:

isMatch in class QueryFilter

Parameters:

table - The table containing this row.

row - The row to check.

Returns:

true if this row should be part of the result set, false otherwise.

getAllColumnIds

public java.util.Set<java.lang.String> getAllColumnIds()

Returns all the columnIds this filter uses, in this case exactly all the columnIds that the sub-filter uses.

Specified by:

getAllColumnIds in class QueryFilter

Returns:

All the columnIds this filter uses.

getScalarFunctionColumns

public java.util.List<ScalarFunctionColumn> getScalarFunctionColumns()

Returns a list of all scalarFunctionColumns this filter uses, in this case the scalarFunctionColumns its sub-filter uses.

Specified by:

getScalarFunctionColumns in class QueryFilter

Returns:

A list of all scalarFunctionColumns this filter uses.

getAggregationColumns

protected java.util.List<AggregationColumn> getAggregationColumns()

Specified by:

getAggregationColumns in class QueryFilter

Returns:

A list of all aggregation columns this filter uses.

getSubFilter

public QueryFilter getSubFilter()

Returns the sub-filter associated with this NegationFilter.

Returns:

The sub-filter associated with this NegationFilter.

toQueryString

public java.lang.String toQueryString()

Returns a string that, when parsed by the query parser, should return an identical filter. The string returned does not contain the WHERE keyword.

Specified by:

toQueryString in class QueryFilter

Returns:

A string form of this filter.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object