| /******************************************************************************* |
| * 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.wst.xsd.ui.internal.adt.editor; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.SocketTimeoutException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| |
| import org.eclipse.core.resources.IEncodedStorage; |
| import org.eclipse.core.resources.IResourceStatus; |
| import org.eclipse.core.resources.IStorage; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Path; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.core.runtime.PlatformObject; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.core.runtime.content.IContentDescription; |
| import org.eclipse.core.runtime.content.IContentTypeManager; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.wst.xsd.ui.internal.editor.XSDEditorPlugin; |
| |
| public class ADTExternalResourceVariant extends PlatformObject |
| { |
| private IStorage storage; |
| private String urlString; |
| |
| public static String getCharset(String name, InputStream stream) throws IOException |
| { |
| IContentDescription description = getContentDescription(name, stream); |
| return description == null ? null : description.getCharset(); |
| } |
| |
| public static IContentDescription getContentDescription(String name, InputStream stream) throws IOException |
| { |
| IContentTypeManager contentTypeManager = Platform.getContentTypeManager(); |
| try |
| { |
| return contentTypeManager.getDescriptionFor(stream, name, IContentDescription.ALL); |
| } |
| finally |
| { |
| if (stream != null) |
| { |
| try |
| { |
| stream.close(); |
| } |
| catch (IOException e) |
| { |
| |
| } |
| } |
| } |
| } |
| |
| public ADTExternalResourceVariant(String urlString) |
| { |
| this.urlString = urlString; |
| } |
| |
| class XSDResourceVariantStorage implements IEncodedStorage |
| { |
| |
| protected File getFile() |
| { |
| return new File(urlString); |
| } |
| |
| public InputStream getContents() throws CoreException |
| { |
| try |
| { |
| URL url = new URL(urlString); |
| URLConnection urlConnection = url.openConnection(); |
| return urlConnection.getInputStream(); |
| } |
| catch (SocketTimeoutException toException) |
| { |
| // handle |
| } |
| catch (IOException e) |
| { |
| |
| } |
| return new ByteArrayInputStream(new byte[0]); |
| } |
| |
| public IPath getFullPath() |
| { |
| return new Path(urlString); |
| } |
| |
| public String getName() |
| { |
| return getFullPath().toFile().getName(); |
| } |
| |
| public boolean isReadOnly() |
| { |
| return true; |
| } |
| |
| public Object getAdapter(Class adapter) |
| { |
| return ADTExternalResourceVariant.this.getAdapter(adapter); |
| } |
| |
| public String getCharset() throws CoreException |
| { |
| InputStream contents = getContents(); |
| try |
| { |
| String charSet = ADTExternalResourceVariant.getCharset(getName(), contents); |
| return charSet; |
| } |
| catch (IOException e) |
| { |
| throw new CoreException(new Status(IStatus.ERROR, XSDEditorPlugin.PLUGIN_ID, IResourceStatus.FAILED_DESCRIBING_CONTENTS, NLS.bind("", new String[] { getFullPath().toString() }), e)); |
| } |
| finally |
| { |
| try |
| { |
| contents.close(); |
| } |
| catch (IOException ioException) |
| { |
| |
| } |
| } |
| } |
| } |
| |
| public IStorage getStorage() |
| { |
| if (storage == null) |
| { |
| storage = new XSDResourceVariantStorage(); |
| } |
| return storage; |
| } |
| } |