/*
* Copyright (c) 2012, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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 com.google.dart.tools.ui.web.utils;
import java.util.ArrayList;
import java.util.List;
/**
* The abstract superclass of model elements.
*/
public abstract class Node {
private Node parent;
private String label;
private List<Node> children = new ArrayList<Node>();
private Token startToken;
private Token endToken;
public Node() {
}
public Node(String label) {
this.label = label;
}
public void addChild(Node child) {
child.setParent(this);
children.add(child);
}
@Override
public boolean equals(Object obj) {
if (obj == null) {
return false;
}
if (this == obj) {
return true;
}
if (this.getClass().isAssignableFrom(obj.getClass())) {
Node other = (Node) obj;
return safeEquals(getId(), other.getId());
} else {
return false;
}
}
public List<Node> getChildren() {
return children;
}
public int getEndOffset() {
if (endToken != null) {
return endToken.getLocation() + endToken.getValue().length();
} else if (startToken != null) {
return startToken.getLocation() + startToken.getValue().length();
} else {
return -1;
}
}
public Token getEndToken() {
return endToken;
}
public String getId() {
if (getParent() == null) {
return getLabel();
} else {
return getParent().getId() + "." + getLabel() + getChildPos();
}
}
public String getLabel() {
return label;
}
public Node getParent() {
return parent;
}
public int getStartOffset() {
return startToken == null ? -1 : startToken.getLocation();
}
public Token getStartToken() {
return startToken;
}
public void setEnd(Token t) {
this.endToken = t;
}
public void setParent(Node parent) {
this.parent = parent;
}
public void setStart(Token t) {
this.startToken = t;
}
@Override
public String toString() {
return getLabel();
}
protected void setLabel(String label) {
this.label = label;
}
private int getChildPos() {
List<Node> children = getParent().getChildren();
for (int i = 0; i < children.size(); i++) {
if (children.get(i) == this) {
return i;
}
}
return -1;
}
private boolean safeEquals(String id, String id2) {
if (id == id2) {
return true;
}
if (id == null) {
return false;
}
return id.equals(id2);
}
}