www.pudn.com > zuixindeID3.zip > NodeInfo.java

package id3; 
import java.lang.*; 
import java.util.*; 
import shared.Error; 
import shared.*; 
 
/** Stores the information in a Graph Node. 
 */ 
public class NodeInfo implements Cloneable{ 
    private int lev; 
    private NodeCategorizer cat; 
    private LinkedList parents; 
     
    /** Constructor. 
     * @param levl The level in the graph this information will be stored. 
     */ 
    public NodeInfo(int levl) { 
        lev = levl; 
        cat = null; 
        Categorizer bad = Globals.badCategorizer; 
        cat = new LeafCategorizer(bad); 
    } 
     
    /** Returns the level in the graph this information is stored. 
     * @return The level in the graph this information is stored. 
     */ 
    public int level() {return lev;} 
    /** Sets the level at which this NodeInfo is stored in the graph. 
     * @param newlev The level at which this NodeInfo is stored. 
     */ 
    public void set_level(int newlev) {lev = newlev;} 
     
    /** Creates a new NodeInfo at the given level. 
     * @param level The level of the new NodeInfo. 
     * @return The NodeInfo created. 
     */ 
    public NodeInfo create_my_type(int level){return new NodeInfo(level);} 
     
    /** Assigns the categorizer stored in the NodeInfo to this NodeInfo. 
     * @param newInfo The NodeInfo containing the categorizer to be assigned. 
     */ 
    public void assign_categorizer(NodeInfo newInfo) { 
        if (newInfo == null) 
            Error.err("NodeInfo::assign_categorizer: NULL info-->fatal_error"); 
        if (newInfo.cat == null) 
            Error.err("NodeInfo::assign_categorizer: NULL cat-->fatal_error"); 
        cat = null; 
        //   ASSERT(newInfo.cat.can_cast_to_node_categorizer()); 
        //		cat = (NodeCategorizer)((NodeCategorizer)newInfo.cat).clone(); 
         
        // @@ the previous two lines should be: 
        cat = (NodeCategorizer)((NodeCategorizer)newInfo.cat).clone(); 
        //      ASSERT(cat); 
         
    } 
     
    //used by Node.print_node_entry() for the Inducer.display_struct function. 
    /** Converts this object to a String representation. 
     * @return A String representation of this NodeInfo. 
     */ 
    public String toString() { 
        return cat.toString() + ", level "+ lev; 
    } 
     
    /** Sets node info to point to given categorizer. 
     * @param categorizer The categorizer to be stored in this NodeInfo. 
     */ 
    public void set_categorizer(NodeCategorizer[] categorizer) { 
        if (categorizer[0] == null) 
            Error.err("NodeInfo::set_categorizer: Cannot set node to NULL categorizer-->fatal_error"); 
        //		cat = null; 
        cat = categorizer[0]; 
        categorizer[0] = null; //This NodeInfo takes possesion of the categorizer 
    } 
     
    /** Returns the categorizer stored in this NodeInfo. 
     * @return The categorizer stored in this NodeInfo. 
     */ 
    public NodeCategorizer get_categorizer() {return cat;} 
}