/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.openejb.config.sys;
import org.apache.openejb.config.SystemProperty;
import org.apache.openejb.util.Join;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import static java.util.Arrays.asList;
public class StackHandler extends DefaultHandler {
private static final boolean DEBUG = Boolean.getBoolean("openejb.sax.debug");
private final List<DefaultHandler> handlers = new LinkedList<>();
protected DefaultHandler get() {
return handlers.get(0);
}
protected DefaultHandler pop() {
return handlers.remove(0);
}
protected void checkAttributes(final Attributes attributes, final String... allowed) throws SAXException {
checkAttributes(attributes, Arrays.asList(allowed));
}
protected void checkAttributes(final Attributes attributes, final List<String> allowed) throws SAXException {
final List<String> invalid = new ArrayList<>();
for (int i = 0; i < attributes.getLength(); i++) {
if (!allowed.contains(attributes.getLocalName(i))) {
invalid.add(attributes.getLocalName(i));
}
}
if (invalid.size() > 0) {
throw new SAXException("Unsupported Attribute(s): " + Join.join(", ", invalid) + ". Supported Attributes are: " + Join.join(", ", allowed) + ". If the setting is a configuration property it must be placed inside the element body.");
}
}
protected void push(final DefaultHandler handler) {
if (DEBUG) {
for (final DefaultHandler ignored : handlers) {
System.out.print(" ");
}
System.out.println("+ " + handler);
}
handlers.add(0, handler);
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
if (DEBUG) {
for (final DefaultHandler ignored : handlers) {
System.out.print(" ");
}
System.out.println("> " + get());
}
get().startElement(uri, localName, qName, attributes);
}
@Override
public void endElement(final String uri, final String localName, final String qName) throws SAXException {
get().endElement(uri, localName, qName);
if (!DEBUG) {
pop();
} else {
for (final DefaultHandler ignored : handlers) {
System.out.print(" ");
}
System.out.println(" - " + pop());
}
}
@Override
public void characters(final char[] ch, final int start, final int length) throws SAXException {
get().characters(ch, start, length);
}
public class Content extends DefaultHandler {
private StringBuilder characters = new StringBuilder();
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
characters = new StringBuilder();
}
public void characters(final char[] ch, final int start, final int length) {
characters.append(new String(ch, start, length));
}
public void endElement(final String uri, final String localName, final String qName) {
setValue(characters.toString());
}
public void setValue(final String text) {
}
}
public class SystemPropertyElement extends Content {
private final List<String> allowed = asList("name", "value");
private final SystemProperty built;
private final List<SystemProperty> list;
public SystemPropertyElement(final List<SystemProperty> systemProperties) {
this.list = systemProperties;
this.built = new SystemProperty();
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
super.startElement(uri, localName, qName, attributes);
built.setName(attributes.getValue("name"));
built.setValue(attributes.getValue("value"));
checkAttributes(attributes, allowed);
}
@Override
public void endElement(final String uri, final String localName, final String qName) {
list.add(built);
super.endElement(uri, localName, qName);
}
}
public abstract class ServiceElement<S extends AbstractService> extends Content {
final S service;
protected ServiceElement(final S service) {
this.service = service;
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
if (attributes.getValue("type") != null) {
service.setType(attributes.getValue("type"));
}
if (attributes.getValue("jar") != null) {
service.setJar(attributes.getValue("jar"));
}
if (attributes.getValue("provider") != null) {
service.setProvider(attributes.getValue("provider"));
}
if (attributes.getValue("id") != null) {
service.setId(attributes.getValue("id"));
}
if (attributes.getValue("class-name") != null) {
service.setClassName(attributes.getValue("class-name"));
}
if (attributes.getValue("constructor") != null) {
service.setConstructor(attributes.getValue("constructor"));
}
if (attributes.getValue("factory-name") != null) {
service.setFactoryName(attributes.getValue("factory-name"));
}
if (attributes.getValue("classpath") != null) {
service.setClasspath(attributes.getValue("classpath"));
}
checkAttributes(attributes, getAttributes());
}
protected List<String> getAttributes() {
final List<String> attributes = new ArrayList<>();
attributes.add("type");
attributes.add("jar");
attributes.add("provider");
attributes.add("id");
attributes.add("class-name");
attributes.add("constructor");
attributes.add("factory-name");
attributes.add("classpath");
return attributes;
}
@Override
public void setValue(final String text) {
try {
service.getProperties().putAll(new PropertiesAdapter().unmarshal(text));
} catch (final Exception e) {
throw new RuntimeException(e);
}
}
}
public class ResourceElement extends ServiceElement<Resource> {
private final Collection<Resource> resources;
public ResourceElement(final Collection<Resource> resources) {
super(new Resource());
this.resources = resources;
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
super.startElement(uri, localName, qName, attributes);
service.setJndi(attributes.getValue("jndi"));
service.setPropertiesProvider(attributes.getValue("property-provider"));
final String aliases = attributes.getValue("aliases");
if (aliases != null) {
service.getAliases().addAll(Arrays.asList(aliases.split(",")));
}
}
@Override
public void endElement(final String uri, final String localName, final String qName) {
resources.add(service);
super.endElement(uri, localName, qName);
}
@Override
protected List<String> getAttributes() {
final List<String> attributes = super.getAttributes();
attributes.add("jndi");
attributes.add("aliases");
attributes.add("properties-provider");
return attributes;
}
}
public class DeclaredServiceElement extends ServiceElement<Service> {
private final Collection<Service> services;
public DeclaredServiceElement(final Collection<Service> services) {
super(new Service());
this.services = services;
}
@Override
public void startElement(final String uri, final String localName, final String qName, final Attributes attributes) throws SAXException {
super.startElement(uri, localName, qName, attributes);
service.setClazz(attributes.getValue("class"));
}
@Override
public void endElement(final String uri, final String localName, final String qName) {
services.add(service); // TODO: add it only once
super.endElement(uri, localName, qName);
}
@Override
protected List<String> getAttributes() {
final List<String> attributes = super.getAttributes();
attributes.add("class");
return attributes;
}
}
}