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/*
* Copyright (c) 2002 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM - Initial API and implementation
* Jens Lukowski/Innoopract - initial renaming/restructuring
*
*/
package org.eclipse.wst.sse.core.document;
import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.nio.charset.MalformedInputException;
import org.eclipse.core.filebuffers.FileBuffers;
import org.eclipse.core.filebuffers.ITextFileBuffer;
import org.eclipse.core.filebuffers.ITextFileBufferManager;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.QualifiedName;
import org.eclipse.core.runtime.content.IContentDescription;
import org.eclipse.jface.text.IDocument;
import org.eclipse.wst.encoding.CodedIO;
import org.eclipse.wst.encoding.EncodingMemento;
import org.eclipse.wst.encoding.IContentDescriptionExtended;
import org.eclipse.wst.encoding.exceptions.MalformedInputExceptionWithDetail;
public class StructuredDocumentLoader {
private ITextFileBufferManager fBufferManager;
public IEncodedDocument createNewStructuredDocument(IFile iFile, IProgressMonitor monitor) throws IOException, CoreException {
IDocument document = null;
IPath locationPath = iFile.getFullPath();
if (iFile.exists()) {
getBufferManager().connect(locationPath, monitor);
ITextFileBuffer buffer = getBufferManager().getTextFileBuffer(locationPath);
document = buffer.getDocument();
}
else {
document = getBufferManager().createEmptyDocument(locationPath);
}
return (IEncodedDocument) document;
}
/**
* @return
*/
protected ITextFileBufferManager getBufferManager() {
if (fBufferManager == null) {
fBufferManager = FileBuffers.getTextFileBufferManager();
}
return fBufferManager;
}
/**
* @see org.eclipse.wst.sse.core.document.IDocumentLoader#createNewStructuredDocument(org.eclipse.core.resources.IFile)
* @deprecated - use form with progress monitor
*/
public IEncodedDocument createNewStructuredDocument(IFile iFile) throws IOException, CoreException {
return createNewStructuredDocument(iFile, null);
}
public IEncodedDocument createNewStructuredDocument(IPath locationPath, IProgressMonitor monitor) throws IOException, CoreException {
IDocument document = null;
File file = null;
file = FileBuffers.getSystemFileAtLocation(locationPath);
if (file.exists()) {
getBufferManager().connect(locationPath, monitor);
ITextFileBuffer buffer = getBufferManager().getTextFileBuffer(locationPath);
document = buffer.getDocument();
}
else {
document = getBufferManager().createEmptyDocument(locationPath);
}
return (IEncodedDocument) document;
}
public void release(IFile iFile, IProgressMonitor monitor) throws CoreException {
IPath locationPath = iFile.getFullPath();
getBufferManager().disconnect(locationPath, monitor);
}
/**
* @param reader
* @return @throws
* IOException
*/
private EncodingMemento getEncodingMemento(Reader reader) throws IOException {
IContentDescription description = Platform.getContentTypeManager().getDescriptionFor(reader, null, new QualifiedName[]{IContentDescriptionExtended.ENCODING_MEMENTO});
EncodingMemento encodingMemento = null;
if (description != null) {
encodingMemento = (EncodingMemento) description.getProperty(IContentDescriptionExtended.ENCODING_MEMENTO);
}
return encodingMemento;
}
/**
* Very mechanical method, just to read the characters, once the reader is
* correctly created. Can throw MalFormedInputException.
*/
protected StringBuffer readInputStream(Reader reader) throws IOException {
int fBlocksRead = 0;
StringBuffer buffer = new StringBuffer();
int numRead = 0;
try {
char tBuff[] = new char[CodedIO.MAX_BUF_SIZE];
while ((numRead = reader.read(tBuff, 0, tBuff.length)) != -1) {
buffer.append(tBuff, 0, numRead);
fBlocksRead++;
}
}
catch (MalformedInputException e) {
EncodingMemento encodingMemento = getEncodingMemento(reader);
throw new MalformedInputExceptionWithDetail(encodingMemento.getJavaCharsetName(), fBlocksRead * CodedIO.MAX_BUF_SIZE + e.getInputLength());
}
return buffer;
}
protected void setDocumentContentsFromReader(IEncodedDocument structuredDocument, Reader reader) throws IOException {
StringBuffer allText = readInputStream(reader);
structuredDocument.set(allText.toString());
}
public void reload(IEncodedDocument document, Reader reader) throws IOException {
setDocumentContentsFromReader(document, reader);
}
}
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