/**

 *   Copyright 2005 Open Cloud Ltd.

 *

 *   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.mobicents.eclipslee.servicecreation.util;



import java.io.File;

import java.util.jar.JarEntry;

import java.util.jar.JarFile;



import org.eclipse.core.resources.IContainer;

import org.eclipse.core.resources.IFile;

import org.eclipse.core.resources.IFolder;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.runtime.IPath;

import org.eclipse.core.runtime.Path;

import org.eclipse.jdt.core.ICompilationUnit;

import org.mobicents.eclipslee.util.slee.xml.DTDXML;

import org.mobicents.eclipslee.util.slee.xml.components.ComponentNotFoundException;

import org.mobicents.eclipslee.util.slee.xml.components.EventXML;

import org.mobicents.eclipslee.xml.EventJarXML;





/**

 * @author cath

 * @author <a href="mailto:brainslog@gmail.com"> Alexandre Mendonca </a>

 */

public class EventFinder extends BaseFinder {

	

	private static EventFinder defaultFinder = new EventFinder();

	

	public static EventFinder getDefault() {

		return defaultFinder;

	}

	

	public static IFile getEventJarXMLFile(ICompilationUnit unit) {

		

		// Get the event's class name.

		String className = EclipseUtil.getClassName(unit);

		

		try {

			IContainer folder = unit.getCorrespondingResource().getParent();

      // ammendonca: for maven we have XML at .../src/main/resources/META-INF, we are at .../src/main/java/<package>/...

      while(!folder.getName().equals("main")) {

        folder = folder.getParent();

      }

      folder = folder.getFolder(new Path("resources/META-INF"));

			IResource children [] = folder.members(IResource.FILE);

			

			for (int i = 0; i < children.length; i++) {

        // For some reason directories come in also...

        if(!(children[i] instanceof IFile)) {

          continue;

        }



				IFile file = (IFile) children[i];

				EventJarXML xml = getEventJarXML(file);

				if (xml == null)

					continue;

				

				try {

					xml.getEvent(className);

				} catch (ComponentNotFoundException e) {

					continue;

				}

				return file;

			}

		} catch (Exception e) {

			return null;

		}

		

		return null; // No matching file found.

	}

	

	public static IFile getEventJavaFile(IFile xmlFile, String name, String vendor, String version) {

		EventJarXML eventJarXML = getEventJarXML(xmlFile);

		if (eventJarXML == null)

			return null;

		

		try {

			EventXML eventXML = eventJarXML.getEvent(name, vendor, version);

			String fname = eventXML.getEventClassName();

			if (fname == null) return null;

			IPath path = new Path(fname.replaceAll("\\.", "/") + ".java");

			IFolder folder = getSourceFolder(xmlFile);

      // ammendonca: we are at xxx/src/main/resources. move to xxx/src/main/java

      folder = folder.getFolder(".." + File.separator + "java");

			IFile file = folder.getFile(path);

			if (file.exists()) return file;

			return null;			

		} catch (ComponentNotFoundException e) {

			return null;

		}

		

	}

	

	public static IFile getEventJavaFile(ICompilationUnit unit) {

		

		EventJarXML eventJarXML = getEventJarXML(unit);

		if (eventJarXML == null) {

			return null;

		}

		

		String clazzName = EclipseUtil.getClassName(unit);

		try {

			eventJarXML.getEvent(clazzName);

			IPath path = new Path(clazzName.replaceAll("\\.", "/") + ".java");

			

			IFolder folder = getSourceFolder(unit);

			IFile file = folder.getFile(path);

			if (file.exists()) return file;

			return null;			

		} catch (ComponentNotFoundException e) {

			return null;

		}

		

	}

	

	public static EventJarXML getEventJarXML(IFile file) {

		try {

			EventJarXML xml = new EventJarXML(file);

			return xml;

		} catch (Exception e) {

			return null;

		}

	}

	

	/**

	 * Tries to locate the corresponding *-event-jar.xml file for this ICompilationUnit.

	 * 

	 * @param element the IJavaElement representing the event-class-name that should be present in the corresponding XML file.

	 * @return the EventXML file containing the event

	 */

	

	public static EventJarXML getEventJarXML(ICompilationUnit unit) {

		

		try {

			String clazzName = EclipseUtil.getClassName(unit);

			

			IContainer folder = unit.getCorrespondingResource().getParent();

      // ammendonca: for maven we have XML at .../src/main/resources/META-INF, we are at .../src/main/java/<package>/...

      while(!folder.getName().equals("main")) {

        folder = folder.getParent();

      }

      folder = folder.getFolder(new Path("resources/META-INF"));

			IResource children[] = folder.members(IResource.FILE);

			

			for (int i = 0; i < children.length; i++) {

				IFile file = (IFile) children[i];

				String filename = file.getName();

				

				if (filename.endsWith("event-jar.xml")) {

					// Consider this file

					

					EventJarXML xml = new EventJarXML(file);

					

					try {

						xml.getEvent(clazzName);

					} catch (org.mobicents.eclipslee.util.slee.xml.components.ComponentNotFoundException e) {

						continue;

					}

					

					// Event was found.  Return this EventXML object.

					return xml;

				}				

			}

			

			return null;

		} catch (Exception e) {

			return null;

		}		

	}



	protected DTDXML loadJar(JarFile jar, JarEntry entry, String location) throws Exception {

		return new EventJarXML(jar, entry, location);

	}

	

	protected DTDXML loadJar(JarFile jar, JarEntry entry) throws Exception {

		return new EventJarXML(jar, entry, null);

	}	

	

	protected DTDXML loadFile(IFile file) throws Exception {

		return new EventJarXML(file);

	}



	protected DTDXML getInnerXML(DTDXML outerXML, String className) throws Exception {

		if (outerXML instanceof EventJarXML) {

			EventJarXML eventJar = (EventJarXML) outerXML;

			EventXML event = eventJar.getEvent(className);

			return event;			

		}

		

		return null;

	}



}