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org.jbpm.compiler.xml.processes.AbstractNodeHandler Maven / Gradle / Ivy
/*
* Copyright 2017 Red Hat, Inc. and/or its affiliates.
*
* 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 org.jbpm.compiler.xml.processes;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import org.drools.compiler.compiler.xml.XmlDumper;
import org.drools.core.xml.BaseAbstractHandler;
import org.drools.core.xml.ExtensibleXmlParser;
import org.drools.core.xml.Handler;
import org.jbpm.process.core.timer.Timer;
import org.jbpm.workflow.core.DroolsAction;
import org.jbpm.workflow.core.Node;
import org.jbpm.workflow.core.NodeContainer;
import org.jbpm.workflow.core.impl.DroolsConsequenceAction;
import org.jbpm.workflow.core.impl.ExtendedNodeImpl;
import org.jbpm.workflow.core.impl.NodeImpl;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
public abstract class AbstractNodeHandler extends BaseAbstractHandler implements Handler {
protected final static String EOL = System.getProperty( "line.separator" );
public AbstractNodeHandler() {
initValidParents();
initValidPeers();
this.allowNesting = false;
}
protected void initValidParents() {
this.validParents = new HashSet>();
this.validParents.add(NodeContainer.class);
}
protected void initValidPeers() {
this.validPeers = new HashSet>();
this.validPeers.add(null);
this.validPeers.add(Node.class);
}
public Object start(final String uri, final String localName, final Attributes attrs,
final ExtensibleXmlParser parser) throws SAXException {
parser.startElementBuilder( localName,
attrs );
NodeContainer nodeContainer = (NodeContainer) parser.getParent();
final Node node = createNode();
final String id = attrs.getValue("id");
node.setId(new Long(id));
final String name = attrs.getValue("name");
node.setName(name);
nodeContainer.addNode(node);
return node;
}
protected abstract Node createNode();
public Object end(final String uri, final String localName,
final ExtensibleXmlParser parser) throws SAXException {
final Element element = parser.endElementBuilder();
Node node = (Node) parser.getCurrent();
handleNode(node, element, uri, localName, parser);
return node;
}
protected void handleNode(final Node node, final Element element, final String uri,
final String localName, final ExtensibleXmlParser parser) throws SAXException {
final String x = element.getAttribute("x");
if (x != null && x.length() != 0) {
try {
node.setMetaData("x", new Integer(x));
} catch (NumberFormatException exc) {
throw new SAXParseException("<" + localName + "> requires an Integer 'x' attribute", parser.getLocator());
}
}
final String y = element.getAttribute("y");
if (y != null && y.length() != 0) {
try {
node.setMetaData("y", new Integer(y));
} catch (NumberFormatException exc) {
throw new SAXParseException("<" + localName + "> requires an Integer 'y' attribute", parser.getLocator());
}
}
final String width = element.getAttribute("width");
if (width != null && width.length() != 0) {
try {
node.setMetaData("width", new Integer(width));
} catch (NumberFormatException exc) {
throw new SAXParseException("<" + localName + "> requires an Integer 'width' attribute", parser.getLocator());
}
}
final String height = element.getAttribute("height");
if (height != null && height.length() != 0) {
try {
node.setMetaData("height", new Integer(height));
} catch (NumberFormatException exc) {
throw new SAXParseException("<" + localName + "> requires an Integer 'height' attribute", parser.getLocator());
}
}
final String color = element.getAttribute("color");
if (color != null && color.length() != 0) {
try {
node.setMetaData("color", new Integer(color));
} catch (NumberFormatException exc) {
throw new SAXParseException("<" + localName + "> requires an Integer 'color' attribute", parser.getLocator());
}
}
}
protected void handleAction(final ExtendedNodeImpl node, final Element element, String type) {
NodeList nodeList = element.getChildNodes();
for (int i = 0; i < nodeList.getLength(); i++) {
org.w3c.dom.Node xmlNode = nodeList.item(i);
String nodeName = xmlNode.getNodeName();
if (nodeName.equals(type)) {
List actions = new ArrayList();
NodeList subNodeList = xmlNode.getChildNodes();
for (int j = 0; j < subNodeList.getLength(); j++) {
Element subXmlNode = (Element) subNodeList.item(j);
DroolsAction action = extractAction(subXmlNode);
actions.add(action);
}
node.setActions(type, actions);
return;
}
}
}
public static DroolsAction extractAction(Element xmlNode) {
String actionType = xmlNode.getAttribute("type");
if ("expression".equals(actionType)) {
String consequence = xmlNode.getTextContent();
DroolsConsequenceAction action = new DroolsConsequenceAction(xmlNode.getAttribute("dialect"), consequence);
return action;
} else {
throw new IllegalArgumentException(
"Unknown action type " + actionType);
}
}
public abstract void writeNode(final Node node, final StringBuilder xmlDump, final boolean includeMeta);
protected void writeNode(final String name, final Node node, final StringBuilder xmlDump, final boolean includeMeta) {
xmlDump.append(" <" + name + " id=\"" + node.getId() + "\" ");
if (node.getName() != null) {
xmlDump.append("name=\"" + XmlDumper.replaceIllegalChars(node.getName()) + "\" ");
}
if (includeMeta) {
Integer x = (Integer) node.getMetaData().get("x");
Integer y = (Integer) node.getMetaData().get("y");
Integer width = (Integer) node.getMetaData().get("width");
Integer height = (Integer) node.getMetaData().get("height");
Integer color = (Integer) node.getMetaData().get("color");
if (x != null && x != 0) {
xmlDump.append("x=\"" + x + "\" ");
}
if (y != null && y != 0) {
xmlDump.append("y=\"" + y + "\" ");
}
if (width != null && width != -1) {
xmlDump.append("width=\"" + width + "\" ");
}
if (height != null && height != -1) {
xmlDump.append("height=\"" + height + "\" ");
}
if (color != null && color != 0) {
xmlDump.append("color=\"" + color + "\" ");
}
}
}
protected boolean containsMetaData(final Node node) {
for (Map.Entry entry: ((NodeImpl) node).getMetaData().entrySet()) {
String name = entry.getKey();
if (!"x".equals(name)
&& !"y".equals(name)
&& !"width".equals(name)
&& !"height".equals(name)
&& !"color".equals(name)
&& !"UniqueId".equals(name)
&& entry.getValue() instanceof String) {
return true;
}
}
return false;
}
protected void writeMetaData(final Node node, final StringBuilder xmlDump) {
for (Map.Entry entry: ((NodeImpl) node).getMetaData().entrySet()) {
String name = entry.getKey();
if (!"x".equals(name)
&& !"y".equals(name)
&& !"width".equals(name)
&& !"height".equals(name)
&& !"color".equals(name)
&& entry.getValue() instanceof String) {
xmlDump.append(" " + EOL);
xmlDump.append(" " + entry.getValue() + " " + EOL);
xmlDump.append(" " + EOL);
}
}
}
protected void writeActions(final String type, List actions, final StringBuilder xmlDump) {
if (actions != null && actions.size() > 0) {
xmlDump.append(" <" + type + ">" + EOL);
for (DroolsAction action: actions) {
writeAction(action, xmlDump);
}
xmlDump.append(" " + EOL);
}
}
public static void writeAction(final DroolsAction action, final StringBuilder xmlDump) {
if (action instanceof DroolsConsequenceAction) {
DroolsConsequenceAction consequenceAction = (DroolsConsequenceAction) action;
xmlDump.append(" timers, final StringBuilder xmlDump) {
if (timers != null && !timers.isEmpty()) {
xmlDump.append(" " + EOL);
List timerList = new ArrayList(timers.keySet());
Collections.sort(timerList, new Comparator() {
public int compare(Timer o1, Timer o2) {
return (int) (o2.getId() - o1.getId());
}
});
for (Timer timer: timerList) {
xmlDump.append(" " + EOL);
writeAction(timers.get(timer), xmlDump);
xmlDump.append(" " + EOL);
}
xmlDump.append(" " + EOL);
}
}
protected void endNode(final StringBuilder xmlDump) {
xmlDump.append("/>" + EOL);
}
protected void endNode(final String name, final StringBuilder xmlDump) {
xmlDump.append(" " + EOL);
}
}
