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java.lang.Objectorg.apache.jackrabbit.spi.commons.query.QueryNode
org.apache.jackrabbit.spi.commons.query.NAryQueryNode<T>
public abstract class NAryQueryNode<T extends QueryNode>
Defines an abstract query node for nodes that have child nodes.
Field Summary | |
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protected List<T> |
operands
The list of operands / children |
Fields inherited from class org.apache.jackrabbit.spi.commons.query.QueryNode |
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TYPE_AND, TYPE_DEREF, TYPE_EXACT, TYPE_LOCATION, TYPE_NODETYPE, TYPE_NOT, TYPE_OR, TYPE_ORDER, TYPE_PATH, TYPE_PROP_FUNCTION, TYPE_RELATION, TYPE_ROOT, TYPE_TEXTSEARCH |
Constructor Summary | |
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NAryQueryNode(QueryNode parent)
Creates a new NAryQueryNode with a reference to a parent
QueryNode . |
|
NAryQueryNode(QueryNode parent,
T[] operands)
Creates a new NAryQueryNode with a reference to a parent
QueryNode and initial operands . |
Method Summary | |
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Object[] |
acceptOperands(QueryNodeVisitor visitor,
Object data)
Helper class to accept a visitor for all operands
of this NAryQueryNode . |
void |
addOperand(T operand)
Adds a new operand (child node) to this query node. |
boolean |
equals(Object obj)
Returns true if obj is the same type of
QueryNode as this node and is equal to
this node. |
int |
getNumOperands()
Returns the number of operands. |
QueryNode[] |
getOperands()
Returns an array of currently set QueryNode operands of this
QueryNode . |
boolean |
needsSystemTree()
Returns true if this query node needs items under
/jcr:system to be queried. |
boolean |
removeOperand(T operand)
Removes an operand (child node) from this query node. |
Methods inherited from class org.apache.jackrabbit.spi.commons.query.QueryNode |
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accept, dump, getParent, getType |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected List<T extends QueryNode> operands
Constructor Detail |
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public NAryQueryNode(QueryNode parent)
NAryQueryNode
with a reference to a parent
QueryNode
.
parent
- the parent node.public NAryQueryNode(QueryNode parent, T[] operands)
NAryQueryNode
with a reference to a parent
QueryNode
and initial operands
.
parent
- the parent node.operands
- child nodes of this NAryQueryNode
.Method Detail |
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public void addOperand(T operand)
operand
(child node) to this query node.
operand
- the child QueryNode
to add.public boolean removeOperand(T operand)
operand
(child node) from this query node.
operand
- the child to remove.
true
if the operand was in the list of child nodes
and has been removed; false
if this node does not contain
operand
as a child node.public QueryNode[] getOperands()
QueryNode
operands of this
QueryNode
. Returns an empty array if no operands are set.
QueryNode
operands.public int getNumOperands()
public Object[] acceptOperands(QueryNodeVisitor visitor, Object data) throws RepositoryException
visitor
for all operands
of this NAryQueryNode
.
visitor
- the visitor to call back.data
- arbitrary data for the visitor.
visitor.visit()
calls.
RepositoryException
- if an error occurs.public boolean equals(Object obj)
QueryNode
true
if obj
is the same type of
QueryNode
as this
node and is equal to
this
node.
equals
in class QueryNode
obj
- the reference object with which to compare.
true
if obj
is equal to
this
; false
otherwise.public boolean needsSystemTree()
true
if this query node needs items under
/jcr:system to be queried.
needsSystemTree
in class QueryNode
true
if this query node needs content under
/jcr:system to be queried; false
otherwise.
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