/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package jena3.graph.impl;

import jena3.graph.NodeVisitor ;

public class Var extends NodeImpl
{
    private final String varName ; 
    
    public Var(String name) {
        if ( name == null )
            throw new IllegalArgumentException("Null for variable name") ;
        this.varName = name ;
    }
    
    @Override
    public String getName()
    { return varName ; }
    
    @Override
    public Object visit( NodeVisitor v ) { return null ; }
    //{ return v.visitVariable( this, getName() ); }
        
    @Override
    public boolean isVariable()
        { return true; }
    
    public String getVarName() { return getName() ; }

//    public boolean isNamedVar() { return Var$.isNamedVarName(getName()) ; }
//
//    public boolean isBlankNodeVar() { return Var$.isBlankNodeVarName(getName()) ; }
//
//    public boolean isAllocVar() { return Var$.isAllocVarName(getName()) ; }
//
//    public boolean isAnonVar() { return Var$.isAnonVar(this) ; }

    @Override
    public String toString() {
        return "?"+varName ;
    }

    @Override
    public int hashCode() {
        final int prime = 103 ;
        int result = 1 ;
        result = prime * result + ((varName == null) ? 0 : varName.hashCode()) ;
        return result ;
    }

    @Override
    public boolean equals(Object obj) {
        if ( this == obj )
            return true ;
        if ( obj == null )
            return false ;
        if ( !(obj instanceof Var) )
            return false ;
        Var other = (Var)obj ;
        if ( varName == null ) {
            if ( other.varName != null )
                return false ;
        } else if ( !varName.equals(other.varName) )
            return false ;
        return true ;
    }
}