com.google.visualization.datasource.query
Class ComparisonFilter

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

Direct Known Subclasses:

ColumnColumnFilter, ColumnValueFilter

public abstract class ComparisonFilter
extends QueryFilter

A filter that decides upon a row by comparing two values. The values can be either column values or constant values, depending on the concrete class extending this one.

Author:

Yonatan B.Y.

Nested Class Summary

static class

ComparisonFilter.Operator The set of possible comparison operators for such filters.

Field Summary

protected ComparisonFilter.Operator

operator The comparison operator for this filter.

Constructor Summary

protected

ComparisonFilter(ComparisonFilter.Operator operator) Constructs a new ComparisonFilter with the given operator.

Method Summary

abstract boolean	equals(java.lang.Object obj)
ComparisonFilter.Operator	getOperator() Returns the operator associated with this CompoundFilter.
abstract int	hashCode()
protected boolean	isOperatorMatch(Value v1, Value v2) Matches the given two values against the operator.

Methods inherited from class com.google.visualization.datasource.query.QueryFilter

getAggregationColumns, getAllColumnIds, getScalarFunctionColumns, isMatch, toQueryString

Methods inherited from class java.lang.Object

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

Field Detail

operator

protected ComparisonFilter.Operator operator

The comparison operator for this filter.

Constructor Detail

ComparisonFilter

protected ComparisonFilter(ComparisonFilter.Operator operator)

Constructs a new ComparisonFilter with the given operator.

Parameters:

operator - The comparison operator for this filter.

Method Detail

isOperatorMatch

protected boolean isOperatorMatch(Value v1,
                                  Value v2)

Matches the given two values against the operator. E.g., if the operator is GT, returns true if v1 > v2. This implementation uses the compareTo() method.

Parameters:

v1 - The first value.

v2 - The second value.

Returns:

true if v1 op v2, false otherwise.

getOperator

public ComparisonFilter.Operator getOperator()

Returns the operator associated with this CompoundFilter.

Returns:

The operator associated with this CompoundFilter.

hashCode

public abstract int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public abstract boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object