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Java Source Code / Java Documentation » RSS RDF » Jena 2.5.5 » com.hp.hpl.jena.graph.query   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    com.hp.hpl.jena.graph.query.Mapping Mapping public class Mapping implements VariableIndexes(Code) this class is used to record the mapping from [variable] Node's to the indexes they are bound to in a Query. Nodes bound to negative values are predeclared; the negative value is converted on index allocation. Constructor Summary public   Mapping(Node[] preDeclare)      Create a new mapping in which all variables are unbound and the variables of preDeclare will be allocated the first slots in the map in their natural order. Method Summary public  boolean hasBound(Node v)      public  int indexOf(Node v)      get the index of a node in the mapping; undefined if the node is not mapped. public  int indexOf(String name)      public  int lookUp(Node v)      get the index of a node in the mapping; return -1 if the node is not mapped. public  int newIndex(Node v)      allocate an index to the node v. public  int size()      public  String toString()      Constructor Detail Mapping public Mapping(Node[] preDeclare)(Code) Create a new mapping in which all variables are unbound and the variables of preDeclare will be allocated the first slots in the map in their natural order. [This is so that the query domain elements that come out of the matching process will be positioned to be suitable as query answers.] Method Detail hasBound public boolean hasBound(Node v)(Code) Answer true iff we have already bound v (predeclaration doesn't count) Parameters:   v - the node to look up true iff this mapping has seen a binding occurance of v indexOf public int indexOf(Node v)(Code) get the index of a node in the mapping; undefined if the node is not mapped. Parameters:   v - the node to look up the index of v in the mapping indexOf public int indexOf(String name)(Code) lookUp public int lookUp(Node v)(Code) get the index of a node in the mapping; return -1 if the node is not mapped. Parameters:   v - the node to look up the index of v in the mapping newIndex public int newIndex(Node v)(Code) allocate an index to the node v. v must not already be mapped. Parameters:   v - the node to be given an index the value of the allocated index size public int size()(Code) Answer the number of names currently held in the map the number of names in the map toString public String toString()(Code) a string representing this mapping Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)