/**
* Copyright © 2006-2016 Web Cohesion (info@webcohesion.com)
*
* 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 com.webcohesion.enunciate.modules.jaxb.model;
import com.webcohesion.enunciate.EnunciateException;
import com.webcohesion.enunciate.javac.decorations.DecoratedProcessingEnvironment;
import com.webcohesion.enunciate.javac.decorations.SourcePosition;
import javax.xml.bind.annotation.XmlAccessOrder;
import javax.xml.namespace.QName;
import java.util.Comparator;
/**
* A comparator for accessors.
*
* @author Ryan Heaton
*/
public class ElementComparator implements Comparator<Element> {
private final XmlAccessOrder accessOrder;
private final String[] propOrder;
private final DecoratedProcessingEnvironment env;
/**
* Instantiate a new comparator, given the sorting parameters.
*
* @param propOrder The property order, or null if none is specified.
* @param order The accessor order.
* @param env Processing environment.
*/
public ElementComparator(String[] propOrder, XmlAccessOrder order, DecoratedProcessingEnvironment env) {
this.accessOrder = order;
this.propOrder = propOrder;
this.env = env;
}
// Inherited.
public int compare(Element accessor1, Element accessor2) {
if (isSameId(accessor1, accessor2)) {
//if the elements have the same identifier.
return 0;
}
//they're not the same, so now determine relative order:
String propertyName1 = accessor1.getSimpleName().toString();
String propertyName2 = accessor2.getSimpleName().toString();
if (this.propOrder != null) {
//apply the specified property order
int propertyIndex1 = find(this.propOrder, propertyName1);
int propertyIndex2 = find(this.propOrder, propertyName2);
if (propertyIndex1 < 0) {
throw new EnunciateException("Property '" + propertyName1 + "' isn't included in the specified property order.");
}
if (propertyIndex2 < 0) {
throw new EnunciateException("Property '" + propertyName2 + "' isn't included in the specified property order.");
}
return propertyIndex1 - propertyIndex2;
}
else if (accessOrder == XmlAccessOrder.ALPHABETICAL) {
return propertyName1.compareTo(propertyName2);
}
//If no order is specified, it's undefined. We'll put it in source order.
SourcePosition position1 = this.env.findSourcePosition(accessor1);
SourcePosition position2 = this.env.findSourcePosition(accessor2);
if (position1 != null && position2 != null) {
return position1.compareTo(position2);
}
else {
//don't have source positions... just provide a random sort order.
return accessor1.hashCode() - accessor2.hashCode();
}
}
private boolean isSameId(Element accessor1, Element accessor2) {
if (accessor1.isWrapped() != accessor2.isWrapped()) {
return false;
}
if (accessor1.isWrapped() && accessor2.isWrapped()) {
String name1 = accessor1.getWrapperName();
name1 = name1 == null ? "" : name1;
String name2 = accessor2.getWrapperName();
name2 = name2 == null ? "" : name2;
String ns1 = accessor1.getWrapperNamespace();
ns1 = ns1 == null ? "" : ns1;
String ns2 = accessor2.getWrapperNamespace();
ns2 = ns2 == null ? "" : ns2;
return name1.equals(name2) && ns1.equals(ns2);
}
if (accessor1.isElementRefs() || accessor2.isElementRefs()) {
//bag of element refs are assumed to not have the same id.
return false;
}
QName ref1 = accessor1.getRef();
QName ref2 = accessor2.getRef();
if (ref1 != null && ref2 != null && ref1.equals(ref2)) {
return true;
}
String name1 = accessor1.getName();
name1 = name1 == null ? "" : name1;
String name2 = accessor2.getName();
name2 = name2 == null ? "" : name2;
String ns1 = accessor1.getNamespace();
ns1 = ns1 == null ? "" : ns1;
String ns2 = accessor2.getNamespace();
ns2 = ns2 == null ? "" : ns2;
return name1.equals(name2) && ns1.equals(ns2);
}
/**
* Finds the order index of the specified property.
*
* @param propOrder The property order.
* @param propertyName The property name.
* @return The order index of the specified property, or -1 if not found.
*/
protected int find(String[] propOrder, String propertyName) {
for (int i = 0; i < propOrder.length; i++) {
if (propOrder[i].equalsIgnoreCase(propertyName)) {
return i;
}
}
return -1;
}
}