/**
* Copyright 2010 JBoss Inc
*
* Licensed 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 org.drools.eclipse.editors.completion;
import java.util.Collection;
import java.util.HashMap;
public class Node {
private HashMap<String, Node> children = new HashMap<String, Node>();
private Node parent = null;
private String token;
private int depth = 0;
public Node(String name) {
this.token = name;
}
/**
* The method will create a new Node instance and try to add it as
* a child node. If an Node with the same string token exists, the
* method will return the existing node instead.
* @param token
* @return
*/
public Node addToken(String token) {
Node newnode = new Node(token);
// set the depth first
newnode.setDepth(depth + 1);
// add the node as a child
newnode = addChild(newnode);
return newnode;
}
/**
* if the string matches this node's token, the method will return
* true. Otherwise it returns false.
* @param input
* @return
*/
public boolean isMatch(String input) {
return input.equals(token);
}
public boolean isMatch(Node n) {
return this.token.equals(n.getToken());
}
/**
* The method will check to see if a Node with the same string token
* already exists. If it doesn't, it will add the token as a child and
* return the same node.
*
* On the otherhand, if there is an existing Node for the same string
* token, the method returns the existing Node instance.
* @param n
* @return
*/
public Node addChild(Node n) {
if (!this.children.containsKey(n.getToken())) {
this.children.put(n.getToken(),n);
n.setParent(this);
return n;
} else {
return (Node)this.children.get(n.getToken());
}
}
public void removeChild(Node n) {
this.children.remove(n.getToken());
}
public Collection<Node> getChildren() {
return this.children.values();
}
/**
* The method will get the child matching the string token
* @param token
* @return
*/
public Node getChild(String token) {
return (Node)this.children.get(token);
}
public Node getParent() {
return parent;
}
public void setParent(Node parent) {
this.parent = parent;
}
public String getToken() {
return token;
}
public void setToken(String token) {
this.token = token;
}
public int getDepth() {
return depth;
}
public void setDepth(int depth) {
this.depth = depth;
}
public void clearChildren() {
this.children.clear();
}
}