/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.xml.impl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.geotools.xml.InstanceComponent;
import org.geotools.xml.Node;
import org.geotools.xml.Text;
/**
*
*
* @source $URL$
*/
public class NodeImpl implements Node {
private InstanceComponent component;
private Object value;
List children;
List attributes;
Node parent;
public NodeImpl(InstanceComponent component) {
this.component = component;
children = new ArrayList();
attributes = new ArrayList();
}
public NodeImpl(InstanceComponent component, Object value) {
this(component);
this.value = value;
}
public InstanceComponent getComponent() {
return component;
}
public Object getValue() {
return value;
}
public void setValue(Object value) {
this.value = value;
}
public boolean hasChild(String name) {
if (name == null) {
return false;
}
for (int i = 0; i < children.size(); i++) {
Node child = (Node) children.get(i);
if (name.equals(child.getComponent().getName())) {
return true;
}
}
return false;
}
public boolean hasChild(Class clazz) {
if (clazz == null) {
return false;
}
for (int i = 0; i < children.size(); i++) {
Node child = (Node) children.get(i);
if (child.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(child.getValue().getClass())) {
return true;
}
}
return false;
}
/**
* Contents of this node.
* <p>
* XXX: either return unmodifeable Collection, or return the collection directly.
* Client code should make the copy iff they need it. Going to try changing it and see
* what breaks.
* </p>
* @see org.geotools.xml.Node#getChildren()
*/
public List getChildren() {
return Collections.unmodifiableList(children);
}
public int getNChildren() {
return children.size();
}
public List getChildren(String name) {
ArrayList matches = new ArrayList();
if (name == null) {
return matches;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
if (name.equals(child.getComponent().getName())) {
matches.add(child);
}
}
return matches;
}
public List getChildren(Class clazz) {
ArrayList matches = new ArrayList();
if (clazz == null) {
return matches;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
if (child.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(child.getValue().getClass())) {
matches.add(child);
}
}
return matches;
}
public Node getChild(String name) {
if (name == null) {
return null;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
if (name.equals(child.getComponent().getName())) {
return child;
}
}
return null;
}
public Node getChild(Class clazz) {
if (clazz == null) {
return null;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
if (child.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(child.getValue().getClass())) {
return child;
}
}
return null;
}
public boolean hasAttribute(Class clazz) {
if (clazz == null) {
return false;
}
for (Iterator itr = attributes.iterator(); itr.hasNext();) {
Node att = (Node) itr.next();
if (att.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(att.getValue().getClass())) {
return true;
}
}
return false;
}
public boolean hasAttribute(String name) {
if (name == null) {
return false;
}
for (Iterator itr = attributes.iterator(); itr.hasNext();) {
Node att = (Node) itr.next();
if (name.equals(att.getComponent().getName())) {
return true;
}
}
return false;
}
public List getAttributes() {
return new ArrayList(attributes);
}
public List getAttributes(Class clazz) {
ArrayList matches = new ArrayList();
if (clazz == null) {
return matches;
}
for (Iterator a = attributes.iterator(); a.hasNext();) {
Node att = (Node) a.next();
if (att.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(att.getValue().getClass())) {
matches.add(att);
}
}
return matches;
}
public int getNAttributes() {
return attributes.size();
}
public Node getAttribute(String name) {
if (name == null) {
return null;
}
for (Iterator itr = attributes.iterator(); itr.hasNext();) {
Node att = (Node) itr.next();
if (name.equals(att.getComponent().getName())) {
return att;
}
}
return null;
}
public Node getAttribute(Class clazz) {
if (clazz == null) {
return null;
}
for (Iterator itr = attributes.iterator(); itr.hasNext();) {
Node att = (Node) itr.next();
if (att.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(att.getValue().getClass())) {
return att;
}
}
return null;
}
public Object getAttributeValue(String name) {
Node node = getAttribute(name);
if (node != null) {
return node.getValue();
}
return null;
}
public Object getAttributeValue(Class clazz) {
if (clazz == null) {
return null;
}
for (Iterator a = attributes.iterator(); a.hasNext();) {
Node att = (Node) a.next();
if (att.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(att.getValue().getClass())) {
return att.getValue();
}
}
return null;
}
public List getAttributeValues(Class clazz) {
ArrayList matches = new ArrayList();
if (clazz == null) {
return matches;
}
for (Iterator a = attributes.iterator(); a.hasNext();) {
Node att = (Node) a.next();
if (att.getValue() == null) {
continue;
}
if (clazz.isAssignableFrom(att.getValue().getClass())) {
matches.add(att.getValue());
}
}
return matches;
}
public String toString() {
return getComponent().getName() + "=" + getValue();
}
public Object getChildValue(int index) {
return ((Node) children.get(index)).getValue();
}
public Object getChildValue(String name) {
Node node = getChild(name);
if (node != null) {
return node.getValue();
}
return null;
}
public Object getChildValue(Class clazz) {
Node node = getChild(clazz);
if (node != null) {
return node.getValue();
}
return null;
}
public List getChildValues(String name) {
ArrayList matches = new ArrayList();
if (name == null) {
return matches;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
if (name.equals(child.getComponent().getName())) {
matches.add(child.getValue());
}
}
return matches;
}
public List getChildValues(Class clazz) {
ArrayList matches = new ArrayList();
if (clazz == null) {
return matches;
}
for (Iterator itr = children.iterator(); itr.hasNext();) {
Node child = (Node) itr.next();
Object parsed = child.getValue();
if (parsed == null) {
continue;
}
if (clazz.isAssignableFrom(parsed.getClass())) {
matches.add(parsed);
}
}
return matches;
}
public Object getAttributeValue(String name, Object defaultValue) {
Object o = getAttributeValue(name);
if (o == null) {
o = defaultValue;
}
return o;
}
public Object getAttributeValue(Class clazz, Object defaultValue) {
Object o = getAttributeValue(clazz);
if (o == null) {
o = defaultValue;
}
return o;
}
public Object getChildValue(String name, Object defaultValue) {
Object o = getChildValue(name);
if (o == null) {
o = defaultValue;
}
return o;
}
public Object getChildValue(Class clazz, Object defaultValue) {
Object o = getChildValue(clazz);
if (o == null) {
o = defaultValue;
}
return o;
}
//additional methods, not part of public api
public void addChild(Node child) {
children.add(child);
child.setParent(this);
}
public Node removeChild(String name) {
Node child = getChild(name);
if (child != null) {
if (children.remove(child)) {
child.setParent(null);
}
}
return child;
}
public void removeChild(Node child) {
if (children.remove(child)) {
child.setParent(null);
}
}
public Node getParent() {
return parent;
}
public void setParent(Node parent) {
this.parent = parent;
}
public void addAttribute(Node attribute) {
attributes.add(attribute);
}
public Node removeAttribute(String name) {
Node attribute = getAttribute(name);
if (attribute != null) {
attributes.remove(attribute);
}
return attribute;
}
public void collapseWhitespace() {
//leading whitespace
for (Iterator<Node> it = ((List<Node>)children).iterator(); it.hasNext();) {
Text t = text(it.next());
if (t == null) break;
if (t.isWhitespace()) {
it.remove();
}
else {
t.trimLeading();
break;
}
}
//trailing whitespace
for (int i = children.size()-1; i > -1; i--) {
Text t = text((Node) children.get(i));
if (t == null) break;
if (t.isWhitespace()) {
children.remove(i);
}
else {
t.trimTrailing();
break;
}
}
//inner whitespace
boolean remove = false;
for (Iterator<Node> it = ((List<Node>)children).iterator(); it.hasNext();) {
Text t = text(it.next());
if (t == null) continue;
t.trimInner();
if (t.isWhitespace()) {
if (remove) {
it.remove();
}
else {
remove = true;
}
}
else {
remove = false;
}
}
}
Text text(Node n) {
if (n.getValue() instanceof Text) {
return (Text) n.getValue();
}
return null;
}
}