Package org.apache.directory.api.ldap.model.filter

Class BranchNode

java.lang.Object

org.apache.directory.api.ldap.model.filter.AbstractExprNode

org.apache.directory.api.ldap.model.filter.BranchNode

All Implemented Interfaces:

Cloneable, ExprNode

Direct Known Subclasses:

AndNode, NotNode, OrNode

public abstract class BranchNode
extends AbstractExprNode

Node representing branches within the expression tree corresponding to logical operators within the filter expression.

Author:

Apache Directory Project

Method Summary

Modifier and Type	Method	Description
Object	accept(FilterVisitor visitor)	Element/node accept method for visitor pattern.
void	addNode(ExprNode node)	Adds a child node to this branch node node
void	addNodeToHead(ExprNode node)	Adds a child node to this branch node at the head rather than the tail.
ExprNode	clone()	Makes a full clone in new memory space of the current node and children
boolean	equals(Object other)
List<ExprNode>	getChildren()	Gets the children below this BranchNode.
ExprNode	getFirstChild()	Convenience method that gets the first child in the children array.
int	hashCode()
boolean	isLeaf()	Tests to see if this node is a leaf or branch node.
boolean	isSchemaAware()	Tells if this Node is Schema aware.
void	setChildren(List<ExprNode> list)	Sets the list of children under this node.

Methods inherited from class org.apache.directory.api.ldap.model.filter.AbstractExprNode

get, getAssertionType, printRefinementToBuffer, set, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

isLeaf

public final boolean isLeaf()

Description copied from interface: ExprNode

Tests to see if this node is a leaf or branch node.

Returns:

false all the time.

See Also:

ExprNode.isLeaf()

clone

public ExprNode clone()

Makes a full clone in new memory space of the current node and children

Specified by:

clone in interface ExprNode

Overrides:

clone in class AbstractExprNode

Returns:

the clone

addNode

public void addNode(ExprNode node)

Adds a child node to this branch node node

Parameters:

node - the child expression to add to this branch node

addNodeToHead

public void addNodeToHead(ExprNode node)

Adds a child node to this branch node at the head rather than the tail.

Parameters:

node - the child expression to add to this branch node

getChildren

public List<ExprNode> getChildren()

Gets the children below this BranchNode. We purposefully do not clone the array list so that backends can sort the order of children using their own search optimization algorithms. We want backends and other parts of the system to be able to induce side effects on the tree structure.

Returns:

the list of child nodes under this branch node.

setChildren

public void setChildren(List<ExprNode> list)

Sets the list of children under this node.

Parameters:

list - the list of children to set.

getFirstChild

public ExprNode getFirstChild()

Convenience method that gets the first child in the children array. Its very useful for NOT nodes since they only have one child by avoiding code that looks like: ( ExprNode ) m_children.get( 0 )

Returns:

the first child

accept

public final Object accept(FilterVisitor visitor)

Description copied from interface: ExprNode

Element/node accept method for visitor pattern.

Parameters:

visitor - the filter expression tree structure visitor

Returns:

The modified element

See Also:

ExprNode.accept( FilterVisitor)

isSchemaAware

public boolean isSchemaAware()

Tells if this Node is Schema aware.

Returns:

true if the Node is SchemaAware

hashCode

public int hashCode()

Overrides:

hashCode in class AbstractExprNode

Returns:

the instance's hash code

See Also:

Object.hashCode()

equals

public boolean equals(Object other)

Overrides:

equals in class AbstractExprNode

Returns:

true if both objects are equal

See Also:

Object.equals(java.lang.Object)