/*
Copyright (c) 2012 Mizar Tools Contributors (mizartools.org)
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.
*/
/* Contributors :
* 2012-05-05 Marco Riccardi - initial implementation
*
*/
package org.mizartools.system.xml;
import java.util.LinkedList;
import org.mizartools.system.ElementParseException;
import org.mizartools.system.IElement;
import org.mizartools.system.INode;
import org.mizartools.utility.xml.XMLAttribute;
import org.mizartools.utility.xml.XMLElement;
public class Implies extends Formula implements IElement {
public static final String NAME = "Implies";
private INode parentNode;
private Integer pid = null;
private Formula hypothesis = null;
private Formula conclusion = null;
private Implies(INode parentNode){
this.parentNode = parentNode;
}
public INode getParentNode() {
return parentNode;
}
public static Implies newInstance(INode parentNode, LinkedList<XMLElement> xmlElementList) throws ElementParseException {
Implies implies = new Implies(parentNode);
XMLElement xmlElement = xmlElementList.poll();
if (!xmlElement.getName().equals(NAME)){
throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "XMLElement is a " + xmlElement.getName() + " not a " + NAME, xmlElementList);
}
for (XMLAttribute xmlAttribute : xmlElement.getXMLAttributeList()){
if (xmlAttribute.getName().equals("pid")){
if (implies.pid == null){
try {implies.pid = Integer.parseInt(xmlAttribute.getValue());}
catch (Exception e) {throw new ElementParseException(ElementParseException.NOT_VALID_TYPE_OF_ATTRIBUTE_ELEMENT, "XMLElement has an attribute " + xmlAttribute.getName() + " with an invalid type", xmlElementList);};
} else {
throw new ElementParseException(ElementParseException.DUPLICATE_ATTRIBUTE_ELEMENT, "XMLElement has a duplicate attribute " + xmlAttribute.getName(), xmlElementList);
}
} else
throw new ElementParseException(ElementParseException.NOT_VALID_ATTRIBUTE_ELEMENT, "XMLElement has not a valid attribute " + xmlAttribute.getName(), xmlElementList);
}
if (!xmlElement.isEmpty()){
while (true){
xmlElement = xmlElementList.peek();
if (xmlElement == null){
throw new ElementParseException(ElementParseException.UNEXPECTED_END_OF_FILE, "Unexpected end of XMLElement list");
}
if (xmlElement.getName().equals(NAME) && xmlElement.isEndElement()){
xmlElement = xmlElementList.poll();
break;
}
if (Formula.isFormula(xmlElement.getName())){
if (implies.hypothesis == null) {
implies.hypothesis = Formula.newInstance(implies, xmlElementList);
} else if (implies.conclusion == null) {
implies.conclusion = Formula.newInstance(implies, xmlElementList);
} else {
throw new ElementParseException(ElementParseException.TOO_MANY_ELEMENTS, "XMLElement list contains too many elements <Formula> in element " + NAME, xmlElementList);
}
} else
throw new ElementParseException(ElementParseException.NOT_VALID_ELEMENT, "The XMLElement " + xmlElement.getName() + " is not valid in " + NAME, xmlElementList);
}
}
return implies;
}
public LinkedList<XMLElement> getXMLElementList() {
LinkedList<XMLElement> xmlElementList = new LinkedList<XMLElement>();
XMLElement xmlElement = new XMLElement(NAME);
if (this.pid != null) {
XMLAttribute xmlAttribute = new XMLAttribute("pid", this.pid);
xmlElement.getXMLAttributeList().add(xmlAttribute);
}
boolean isEmpty = !(hypothesis != null || conclusion != null);
xmlElement.setEmpty(isEmpty);
xmlElementList.add(xmlElement);
if (this.hypothesis != null){
xmlElementList.addAll(this.hypothesis.getXMLElementList());
}
if (this.conclusion != null){
xmlElementList.addAll(this.conclusion.getXMLElementList());
}
if (!isEmpty) {
xmlElement = new XMLElement(NAME);
xmlElement.setEndElement(true);
xmlElementList.add(xmlElement);
}
return xmlElementList;
}
public Integer getPid(){
return pid;
}
public Formula getHypothesis(){
return hypothesis;
}
public Formula getConclusion(){
return conclusion;
}
@Override
public void accept(Visitor visitor) {
if (visitor.visit(this)) {}
visitor.endVisit(this);
}
@Override
public String toString(){
ToStringVisitor toStringVisitor = new ToStringVisitor();
this.accept(toStringVisitor);
return toStringVisitor.toString();
}
}