org.mmbase.storage.search.implementation
Class BasicRelationStep

java.lang.Object
  org.mmbase.storage.search.implementation.BasicStep
      org.mmbase.storage.search.implementation.BasicRelationStep

All Implemented Interfaces:

Serializable, RelationStep, Step

public class BasicRelationStep
extends BasicStep
implements RelationStep, Serializable

Basic implementation.

The checkedDirectionality property defaults to false. The directionality property defaults to DIRECTIONS_BOTH.

Since:

MMBase-1.7

Version:

$Id: BasicRelationStep.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.BasicStep

alias, builder, modifiable, nodes

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

DIRECTIONALITY_DESCRIPTIONS, DIRECTIONS_ALL, DIRECTIONS_BOTH, DIRECTIONS_DESTINATION, DIRECTIONS_EITHER, DIRECTIONS_SOURCE

Constructor Summary

BasicRelationStep(String builder, Step previous, Step next)
Creator.

Method Summary

boolean	equals(Object obj) Compares this step to the specified object.
boolean	getCheckedDirectionality() Gets the value of the checkedDirectionality property.
int	getDirectionality() Gets the directionality mode used with this relation.
String	getDirectionalityDescription() Returns a description of the part
Step	getNext() Gets the next step.
Step	getPrevious() Gets the previous step.
Integer	getRole() Gets the role for this relation, if specified.
String	getRoleDescription()
int	hashCode()
BasicRelationStep	setCheckedDirectionality(boolean checkedDirectionality) Sets checkedDirectionality property.
BasicRelationStep	setDirectionality(int directionality) Sets directionality property.
BasicRelationStep	setRole(Integer role) Sets role property.
String	toString() Returns a string representation of this Step.

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

addNode, getAlias, getNodes, getTableName, setAlias, setUnmodifiable

Methods inherited from class java.lang.Object

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

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

addNode, getAlias, getNodes, getTableName, setUnmodifiable

Constructor Detail

BasicRelationStep

BasicRelationStep(String builder,
                  Step previous,
                  Step next)

Creator.

Parameters:

builder - The relation builder.

previous - The previous step.

next - The next step.

Throws:

IllegalArgumentException - when an invalid argument is supplied.

Method Detail

setCheckedDirectionality

public BasicRelationStep setCheckedDirectionality(boolean checkedDirectionality)

Sets checkedDirectionality property.

Parameters:

checkedDirectionality - The checkedDirectionality property.

Returns:

This BasicRelationStep instance.

See Also:

getCheckedDirectionality()

setDirectionality

public BasicRelationStep setDirectionality(int directionality)

Sets directionality property.

Parameters:

directionality - The directionality. Must be one of the values defined in RelationStep.

Returns:

This BasicRelationStep instance.

Throws:

IllegalArgumentException - when an invalid argument is supplied.

setRole

public BasicRelationStep setRole(Integer role)

Sets role property.

Parameters:

role - The role.

Returns:

This BasicRelationStep instance.

getCheckedDirectionality

public boolean getCheckedDirectionality()

Description copied from interface: RelationStep

Gets the value of the checkedDirectionality property. This property determines how uni/bi-directionality affects which relations are followed from destination to source, when the directionality property is set to RelationStep.DIRECTIONS_SOURCE or RelationStep.DIRECTIONS_BOTH.

When this value is true, only bi-directional relations are followed from destination to source. Otherwise unidirectional relations are followed from destination to source as well.

Specified by:

getCheckedDirectionality in interface RelationStep

getDirectionality

public int getDirectionality()

Description copied from interface: RelationStep

Gets the directionality mode used with this relation. This is one of values defined in this class.

Specified by:

getDirectionality in interface RelationStep

getDirectionalityDescription

public String getDirectionalityDescription()

Returns a description of the part

getRole

public Integer getRole()

Description copied from interface: RelationStep

Gets the role for this relation, if specified. I.e. the nodenumber of the corresponding RelDef node, or null.

Specified by:

getRole in interface RelationStep

getRoleDescription

public String getRoleDescription()

getPrevious

public Step getPrevious()

Description copied from interface: RelationStep

Gets the previous step.

Specified by:

getPrevious in interface RelationStep

getNext

public Step getNext()

Description copied from interface: RelationStep

Gets the next step.

Specified by:

getNext in interface RelationStep

equals

public boolean equals(Object obj)

Description copied from interface: Step

Compares this step to the specified object. The result is true if and only if the argument is a non-null Step, but not RelationStep, object associated with the same tablename, using the same alias and including the same nodes.

Specified by:

equals in interface RelationStep

Specified by:

equals in interface Step

Overrides:

equals in class BasicStep

Parameters:

obj - The object to compare with.

Returns:

true if the objects are equal, false otherwise.

See Also:

RelationStep.equals(java.lang.Object)

hashCode

public int hashCode()

Specified by:

hashCode in interface RelationStep

Specified by:

hashCode in interface Step

Overrides:

hashCode in class BasicStep

toString

public String toString()

Description copied from interface: Step

Returns a string representation of this Step. The string representation has the form "Step(tablename:<tablename>, alias:<alias>, nodes:<nodes>)" where

• <tablename> is the tablename returnedby getTableName()
• <alias> is the alias returned by getAlias()
• <nodes> is the string representation of the ordered list of nodenumbers returned by getNodes()

Specified by:

toString in interface RelationStep

Specified by:

toString in interface Step

Overrides:

toString in class BasicStep

Returns:

A string representation of this Step.