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package org.apache.tuscany.sca.impl.layout;
import java.util.ArrayList;
import org.apache.tuscany.sca.impl.artifacts.Component;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class EntityBuilder {
private Document dom;
private final int initPoint = 100;
private final int spaceX = Component.DEFAULT_WIDTH*2;
private final int spaceY = Component.DEFAULT_HEIGHT*2;
private ArrayList<Integer> levelCount = new ArrayList<Integer>();
public EntityBuilder(Document aDom){
dom = aDom;
}
public Entity[] buildEntities(){
Entity[] elts = null;
//get the root element
Element docEle = dom.getDocumentElement();
//get a nodelist of elements
NodeList nl = docEle.getElementsByTagName("sca:component");
if(nl != null && nl.getLength() > 0 ) {
elts = new Entity[nl.getLength()];
for(int i = 0 ; i < nl.getLength();i++) {
Element nVal = (Element)nl.item(i);
elts[i].setComponentName(nVal.getAttribute("name"));
setReferences(nVal, elts[i]);
setServices(nVal, elts[i]);
setProperties(nVal, elts[i]);
elts[i].referenceHeight();
elts[i].serviceHeight();
elts[i].propertyLength();
}
}
//get a nodelist of elements
NodeList nl2 = docEle.getElementsByTagName("sca:wire");
if(nl2 != null && nl2.getLength() > 0 ) {
for(int i = 0 ; i < nl2.getLength();i++) {
Element nVal = (Element)nl2.item(i);
String[] source = splitValues(nVal.getAttribute("source"));
String[] target = splitValues(nVal.getAttribute("target"));
for(Entity ent: elts){
if(ent.getComponentName().equalsIgnoreCase(source[0])){
ent.addAnAdjacentEntity(target[0]);
ent.addToRefToSerMap(source[1], target[1]);
break;
}
}
}
}
positionEntities(elts);
return elts;
}
private void positionEntities(Entity[] ents){
Entity startEnt = null;
for(Entity ent: ents){
if(ent.getAdjacentEntities().size() != 0){
setPosition(ent, initPoint, initPoint, 0, 0);
levelCount.add(0, 1);
startEnt = ent;
break;
}
}
if(startEnt != null)
assignPositions(ents, startEnt);
}
private void assignPositions(Entity[] ents, Entity ent){
int i=0;
for(String name: ent.getAdjacentEntities()){
for(Entity aEnt: ents){
if(name.equalsIgnoreCase(aEnt.getComponentName())){
int lane = ent.getLane()+1;
if(levelCount.get(lane) != null){
levelCount.add(lane, 1);
setPosition(aEnt, ent.getX()+spaceX, ent.getY(), 0, lane);
}
else{
int level = levelCount.get(lane);
levelCount.add(lane, level+1);
setPosition(aEnt, ent.getX()+spaceX, ent.getY()+spaceY*level, level, lane);
}
assignPositions(ents, aEnt);
break;
}
}
i++;
}
}
private void setPosition(Entity ent, int x, int y, int level, int lane){
ent.setX(x);
ent.setY(y);
ent.setLevel(level);
ent.setLane(lane);
}
private String[] splitValues(String str){
return str.split("/");
}
private void setReferences(Element nVal, Entity ent) {
NodeList nl = nVal.getElementsByTagName("sca:reference");
if(nl != null && nl.getLength() > 0 ) {
for(int i = 0 ; i < nl.getLength();i++) {
Element elt = (Element)nl.item(i);
ent.addAReference(elt.getAttribute("name"));
}
}
}
private void setServices(Element nVal, Entity ent) {
NodeList nl = nVal.getElementsByTagName("sca:service");
if(nl != null && nl.getLength() > 0 ) {
for(int i = 0 ; i < nl.getLength();i++) {
Element elt = (Element)nl.item(i);
ent.addAService(elt.getAttribute("name"));
}
}
}
private void setProperties(Element nVal, Entity ent) {
NodeList nl = nVal.getElementsByTagName("sca:property");
if(nl != null && nl.getLength() > 0 ) {
for(int i = 0 ; i < nl.getLength();i++) {
Element elt = (Element)nl.item(i);
ent.addAProperty(elt.getAttribute("name"));
}
}
}
}
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