diff options
Diffstat (limited to 'bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/FileContentCache.java')
| -rw-r--r-- | bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/FileContentCache.java | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/FileContentCache.java b/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/FileContentCache.java deleted file mode 100644 index e6243ad509..0000000000 --- a/bundles/org.eclipse.jst.jsp.core/src/org/eclipse/jst/jsp/core/internal/util/FileContentCache.java +++ /dev/null @@ -1,225 +0,0 @@ -/******************************************************************************* - * Copyright (c) 2007 IBM Corporation and others. - * 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: - * IBM Corporation - initial API and implementation - * - *******************************************************************************/ -package org.eclipse.jst.jsp.core.internal.util; - -import java.io.File; -import java.io.IOException; -import java.io.InputStream; -import java.io.InputStreamReader; -import java.io.Reader; -import java.lang.ref.Reference; -import java.lang.ref.SoftReference; -import java.util.HashMap; -import java.util.Iterator; -import java.util.Map; - -import org.eclipse.core.filebuffers.FileBuffers; -import org.eclipse.core.filebuffers.ITextFileBuffer; -import org.eclipse.core.filebuffers.LocationKind; -import org.eclipse.core.resources.IFile; -import org.eclipse.core.resources.IResource; -import org.eclipse.core.resources.ResourcesPlugin; -import org.eclipse.core.runtime.CoreException; -import org.eclipse.core.runtime.IPath; -import org.eclipse.core.runtime.NullProgressMonitor; -import org.eclipse.core.runtime.Platform; -import org.eclipse.core.runtime.QualifiedName; -import org.eclipse.core.runtime.content.IContentDescription; -import org.eclipse.jst.jsp.core.internal.Logger; -import org.eclipse.wst.sse.core.internal.util.Debug; - -public class FileContentCache { - private static class CacheEntry { - String contents; - long modificationStamp = IResource.NULL_STAMP; - IPath path; - - CacheEntry(IPath path) { - this.path = path; - modificationStamp = getModificationStamp(path); - contents = readContents(path); - } - - private IFile getFile(IPath path) { - if (path.segmentCount() > 1) { - return ResourcesPlugin.getWorkspace().getRoot().getFile(path); - } - return null; - } - - boolean isStale() { - if (modificationStamp == IResource.NULL_STAMP) { - return true; - } - long newStamp = getModificationStamp(path); - return newStamp > modificationStamp; - } - - private String detectCharset(IFile file) { - if (file.getType() == IResource.FILE && file.isAccessible()) { - IContentDescription d = null; - try { - // optimized description lookup, might not succeed - d = file.getContentDescription(); - if (d != null) - return d.getCharset(); - } - catch (CoreException e) { - // should not be possible given the accessible and file - // type - // check above - } - InputStream contents = null; - try { - contents = file.getContents(); - IContentDescription description = Platform.getContentTypeManager().getDescriptionFor(contents, file.getName(), new QualifiedName[]{IContentDescription.CHARSET}); - if (description != null) { - return description.getCharset(); - } - } - catch (IOException e) { - // will try to cleanup in finally - } - catch (CoreException e) { - Logger.logException(e); - } - finally { - if (contents != null) { - try { - contents.close(); - } - catch (Exception e) { - // not sure how to recover at this point - } - } - } - } - return ResourcesPlugin.getEncoding(); - } - - private long getModificationStamp(IPath filePath) { - IFile f = getFile(filePath); - if (f != null && f.isAccessible()) { - return f.getModificationStamp(); - } - File file = filePath.toFile(); - if (file.exists()) - return file.lastModified(); - return IResource.NULL_STAMP; - } - - private String readContents(IPath filePath) { - if (DEBUG) - System.out.println("readContents:" + filePath); - StringBuffer s = new StringBuffer(); - InputStream is = null; - try { - IFile f = getFile(filePath); - if (f != null && f.isAccessible()) { - String charset = detectCharset(f); - is = f.getContents(); - Reader reader = new InputStreamReader(is, charset); - char[] readBuffer = new char[2048]; - int n = reader.read(readBuffer); - while (n > 0) { - s.append(readBuffer, 0, n); - n = reader.read(readBuffer); - } - } - } - catch (Exception e) { - if (Debug.debugStructuredDocument) { - Logger.logException(e); - e.printStackTrace(); - } - } - finally { - try { - if (is != null) { - is.close(); - } - } - catch (Exception e) { - // nothing to do - } - } - if (is == null) { - try { - FileBuffers.getTextFileBufferManager().connect(filePath, LocationKind.LOCATION, new NullProgressMonitor()); - ITextFileBuffer buffer = FileBuffers.getTextFileBufferManager().getTextFileBuffer(filePath, LocationKind.LOCATION); - if (buffer != null) { - s.append(buffer.getDocument().get()); - } - } - catch (CoreException e) { - // nothing to do - Logger.logException(e); - } - finally { - try { - FileBuffers.getTextFileBufferManager().disconnect(filePath, LocationKind.LOCATION, new NullProgressMonitor()); - } - catch (CoreException e) { - Logger.logException(e); - } - } - } - return s.toString(); - } - - } - - static final boolean DEBUG = false; - - static FileContentCache instance = new FileContentCache(); - - public static FileContentCache getInstance() { - return instance; - } - - private HashMap fContentMap; - - private FileContentCache() { - super(); - fContentMap = new HashMap(); - } - - private void cleanup() { - Iterator iterator = fContentMap.entrySet().iterator(); - while (iterator.hasNext()) { - Map.Entry entry = (Map.Entry) iterator.next(); - if (entry.getValue() != null && ((Reference) entry.getValue()).get() == null) { - iterator.remove(); - } - } - } - - public String getContents(IPath filePath) { - if (DEBUG) - System.out.println("getContents:" + filePath); - CacheEntry entry = null; - Object o = fContentMap.get(filePath); - if (o instanceof Reference) { - entry = (CacheEntry) ((Reference) o).get(); - } - if (entry == null || entry.isStale()) { - if (DEBUG && entry != null && entry.isStale()) - System.out.println("stale contents:" + filePath); - entry = new CacheEntry(filePath); - fContentMap.put(filePath, new SoftReference(entry)); - } - cleanup(); - return entry.contents; - } - - -} |