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/*******************************************************************************
* Copyright (c) 2004 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.css.core.internal.metamodel;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.eclipse.wst.css.core.metamodel.CSSMMNode;
abstract class CSSMMNodeImpl implements CSSMMNode {
public CSSMMNodeImpl() {
super();
}
public abstract String getType();
public String getDescription() {
return fDescription;
}
public String getAttribute(String name) {
if (fAttributes == null) {
return null;
}
return (String) fAttributes.get(name);
}
public Iterator getChildNodes() {
if (fChildNodes == null) {
return Collections.EMPTY_LIST.iterator();
}
else {
return Collections.unmodifiableCollection(fChildNodes).iterator();
}
}
public Iterator getDescendants() {
List descendants = new ArrayList();
Iterator iChild = getChildNodes();
while (iChild.hasNext()) {
CSSMMNode child = (CSSMMNode) iChild.next();
Iterator iDescendant = child.getDescendants();
if (iDescendant.hasNext()) {
while (iDescendant.hasNext()) {
CSSMMNode descendant = (CSSMMNode) iDescendant.next();
if (!descendants.contains(descendant)) {
descendants.add(descendant);
}
}
}
else {
if (!descendants.contains(child)) {
descendants.add(child);
}
}
}
return Collections.unmodifiableCollection(descendants).iterator();
}
void appendChild(CSSMMNode child) {
if (child == null) {
return;
}
if (fChildNodes == null) {
fChildNodes = new ArrayList();
}
if (!fChildNodes.contains(child)) {
fChildNodes.add(child);
((CSSMMNodeImpl) child).fRefCount++;
}
}
void removeChild(CSSMMNode child) {
if (child == null || fChildNodes == null) {
return;
}
Iterator i = fChildNodes.iterator();
while (i.hasNext()) {
if (i.next() == child) {
i.remove();
((CSSMMNodeImpl) child).fRefCount--;
return;
}
}
}
void removeAllChildNodes() {
if (fChildNodes == null) {
return;
}
Iterator i = fChildNodes.iterator();
while (i.hasNext()) {
((CSSMMNodeImpl) i.next()).fRefCount--;
}
fChildNodes.clear();
}
abstract boolean canContain(CSSMMNode child);
void initializeAttribute(Map attributes) throws IllegalArgumentException {
if (fAttributes == null) {
fAttributes = new HashMap();
}
fAttributes.putAll(attributes);
postSetAttribute();
}
void setDescription(String description) {
fDescription = description;
}
void postSetAttribute() throws IllegalArgumentException {
// default : nop
}
abstract short getError();
int getChildCount() {
return (fChildNodes != null) ? fChildNodes.size() : 0;
}
int getReferenceCount() {
return fRefCount;
}
private List fChildNodes = null;
private String fDescription = null;
private Map fAttributes = null;
private int fRefCount = 0; // for error check
static final String ATTR_NAME = "name"; //$NON-NLS-1$
static final String NAME_NOT_AVAILABLE = ""; //$NON-NLS-1$
}
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