org.mmbase.storage.search.implementation
Class BasicAggregatedField

java.lang.Object
  org.mmbase.storage.search.implementation.BasicStepField
      org.mmbase.storage.search.implementation.BasicAggregatedField

All Implemented Interfaces:

Serializable, AggregatedField, StepField, SizeMeasurable

public class BasicAggregatedField
extends BasicStepField
implements AggregatedField

Basic implementation. The step alias is equal to the field name, unless it is explicitly set.

Since:

MMBase-1.7

Version:

$Id: BasicAggregatedField.java 41982 2010-04-20 14:05:14Z michiel $

Author:

Rob van Maris

See Also:

Serialized Form

Field Summary

Fields inherited from class org.mmbase.storage.search.implementation.BasicStepField

modifiable

Fields inherited from interface org.mmbase.storage.search.AggregatedField

AGGREGATION_TYPE_COUNT, AGGREGATION_TYPE_COUNT_DISTINCT, AGGREGATION_TYPE_DESCRIPTIONS, AGGREGATION_TYPE_GROUP_BY, AGGREGATION_TYPE_MAX, AGGREGATION_TYPE_MIN

Constructor Summary

BasicAggregatedField(Step step, Field fieldDefs, int aggregationType)

Method Summary

boolean	equals(Object obj) Compares this stepfield to the specified object.
int	getAggregationType() Gets the aggregation type.
String	getAggregationTypeDescription() Gets the aggregation type.
int	hashCode()
BasicAggregatedField	setAggregationType(int aggregationType) Sets the aggregation type.
String	toString() Returns a string representation of this StepField.

Methods inherited from class org.mmbase.storage.search.implementation.BasicStepField

compareSteps, equalFieldValues, getAlias, getByteSize, getByteSize, getField, getFieldName, getFieldName, getStep, getType, setAlias, setUnmodifiable, testValue

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mmbase.storage.search.StepField

getAlias, getFieldName, getStep, getType, setUnmodifiable

Constructor Detail

BasicAggregatedField

public BasicAggregatedField(Step step,
                            Field fieldDefs,
                            int aggregationType)

Parameters:

step - The associated step.

fieldDefs - The associated fieldDefs.

aggregationType - The aggregation type.

Throws:

IllegalArgumentException - when an invalid argument is supplied.

Method Detail

setAggregationType

public BasicAggregatedField setAggregationType(int aggregationType)

Sets the aggregation type.

Parameters:

aggregationType - The aggregation type.

Returns:

This BasicAggregatedField instance.

Throws:

IllegalArgumentException - when an invalid argument is supplied.

getAggregationType

public int getAggregationType()

Gets the aggregation type.

Specified by:

getAggregationType in interface AggregatedField

getAggregationTypeDescription

public String getAggregationTypeDescription()

Gets the aggregation type.

equals

public boolean equals(Object obj)

Description copied from interface: StepField

Compares this stepfield to the specified object. The result is true if and only if the argument is a non-null StepField object associated with the same field, using the same alias.

Specified by:

equals in interface AggregatedField

Specified by:

equals in interface StepField

Overrides:

equals in class BasicStepField

Parameters:

obj - The object to compare with.

Returns:

true if the objects are equal, false otherwise.

hashCode

public int hashCode()

Specified by:

hashCode in interface StepField

Overrides:

hashCode in class BasicStepField

toString

public String toString()

Description copied from interface: StepField

Returns a string representation of this StepField. The string representation has the form "StepField(step:<step>, fieldname:<fieldname>, alias:<alias>)" where

• <step> is the step alias returned by getStep().getAlias() or, when the step alias is null, the step tablename returned by getStep().getTableName().
• <fieldname> is the fieldname returned by getFieldName()
• <alias> is the alias returned by getAlias()

Specified by:

toString in interface AggregatedField

Specified by:

toString in interface StepField

Overrides:

toString in class BasicStepField

Returns:

A string representation of this StepField.