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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.define.utility;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.nio.CharBuffer;
import java.util.Arrays;
import java.util.List;
import java.util.logging.Level;
import org.eclipse.core.filesystem.EFS;
import org.eclipse.core.filesystem.IFileInfo;
import org.eclipse.core.filesystem.IFileStore;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.osee.define.DefinePlugin;
import org.eclipse.osee.framework.core.exception.OseeCoreException;
import org.eclipse.osee.framework.core.exception.OseeExceptions;
import org.eclipse.osee.framework.jdk.core.type.HashCollection;
import org.eclipse.osee.framework.jdk.core.util.Lib;
import org.eclipse.osee.framework.jdk.core.util.Strings;
import org.eclipse.osee.framework.logging.OseeLog;
/**
* @author Roberto E. Escobar
*/
public class UriResourceContentFinder {
private final URI source;
private final HashCollection<IResourceLocator, IResourceHandler> locatorMap;
private final boolean isRecursionAllowed;
private final boolean isFileWithMultiplePaths;
public UriResourceContentFinder(final URI source, final boolean isRecursionAllowed, final boolean isFileWithMultiplePaths) {
super();
this.source = source;
this.isRecursionAllowed = isRecursionAllowed;
this.isFileWithMultiplePaths = isFileWithMultiplePaths;
this.locatorMap = new HashCollection<IResourceLocator, IResourceHandler>();
}
public void addLocator(IResourceLocator locator, IResourceHandler... handler) {
if (locator != null && handler != null && handler.length > 0) {
synchronized (locatorMap) {
locatorMap.put(locator, Arrays.asList(handler));
}
}
}
public void removeLocator(IResourceLocator locator) {
if (locator != null) {
synchronized (locatorMap) {
locatorMap.removeValues(locator);
}
}
}
public void execute(IProgressMonitor monitor) throws OseeCoreException {
try {
IFileStore fileStore = EFS.getStore(source);
if (isFileWithMultiplePaths) {
processFileWithPaths(monitor, fileStore);
} else {
monitor.beginTask("Scanning files", 1);
processFileStore(monitor, fileStore);
monitor.worked(1);
}
} catch (Exception ex) {
OseeExceptions.wrapAndThrow(ex);
} finally {
monitor.done();
}
}
private void processFileWithPaths(IProgressMonitor monitor, IFileStore fileStore) throws Exception {
IFileInfo info = fileStore.fetchInfo(EFS.NONE, monitor);
if (info != null && info.exists()) {
List<String> paths = Lib.readListFromFile(new File(fileStore.toURI()), true);
monitor.beginTask("Searching for files", paths.size());
for (String path : paths) {
if (Strings.isValid(path)) {
processFileStore(monitor, EFS.getStore(new File(path).toURI()));
}
if (monitor.isCanceled()) {
break;
}
monitor.worked(1);
}
} else {
monitor.beginTask("Searching for files", 1);
}
}
private void processFileStore(IProgressMonitor monitor, IFileStore fileStore) throws Exception {
IFileInfo info = fileStore.fetchInfo(EFS.NONE, monitor);
if (info != null && info.exists()) {
if (info.isDirectory()) {
processDirectory(monitor, fileStore);
} else {
processFile(monitor, fileStore);
}
}
}
private boolean isValidDirectory(IProgressMonitor monitor, IFileStore fileStore) {
boolean result = false;
for (IResourceLocator locator : locatorMap.keySet()) {
if (monitor.isCanceled()) {
break;
}
if (locator.isValidDirectory(fileStore)) {
result = true;
break;
}
}
return result;
}
private void processDirectory(IProgressMonitor monitor, IFileStore fileStore) throws Exception {
if (isValidDirectory(monitor, fileStore)) {
boolean isProcessingAllowed = false;
for (IFileStore childStore : fileStore.childStores(EFS.NONE, monitor)) {
isProcessingAllowed = false;
if (monitor.isCanceled()) {
break;
}
if (!isRecursionAllowed) {
isProcessingAllowed = !childStore.fetchInfo().isDirectory();
} else {
isProcessingAllowed = true;
}
if (isProcessingAllowed) {
processFileStore(monitor, childStore);
}
}
}
monitor.worked(1);
}
private void processFile(IProgressMonitor monitor, IFileStore fileStore) throws Exception {
if (!monitor.isCanceled()) {
for (IResourceLocator locator : locatorMap.keySet()) {
if (locator.isValidFile(fileStore)) {
CharBuffer fileBuffer = getContents(monitor, fileStore);
if (locator.hasValidContent(fileBuffer)) {
String fileName = locator.getIdentifier(fileStore, fileBuffer);
if (!monitor.isCanceled()) {
monitor.subTask(String.format("processing [%s]", fileStore.getName()));
notifyListeners(locator, fileStore.toURI(), fileName, fileBuffer);
}
}
}
}
}
monitor.worked(1);
}
private CharBuffer getContents(IProgressMonitor monitor, IFileStore fileStore) throws Exception {
CharBuffer toReturn = null;
InputStream inputStream = null;
try {
inputStream = new BufferedInputStream(fileStore.openInputStream(EFS.NONE, monitor));
toReturn = Lib.inputStreamToCharBuffer(inputStream);
} finally {
if (inputStream != null) {
try {
inputStream.close();
} catch (IOException ex) {
OseeLog.log(DefinePlugin.class, Level.SEVERE, String.format("Error closing stream for resource: [%s]",
fileStore.getName()), ex);
}
}
}
return toReturn;
}
private void notifyListeners(final IResourceLocator locator, final URI uriPath, final String fileName, final CharBuffer fileBuffer) {
for (IResourceHandler handler : locatorMap.getValues(locator)) {
handler.onResourceFound(uriPath, fileName, fileBuffer);
}
}
}
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