/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.core.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.sql.SQLException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.teiid.core.CorePlugin;
import org.teiid.core.TeiidException;
public class ObjectConverterUtil {
private static final int DEFAULT_READING_SIZE = 8192;
protected static byte[] convertBlobToByteArray(final java.sql.Blob data) throws TeiidException {
try {
// Open a stream to read the BLOB data
InputStream l_blobStream = data.getBinaryStream();
return convertToByteArray(l_blobStream);
} catch (IOException ioe) {
final Object[] params = new Object[]{data.getClass().getName()};
throw new TeiidException(ioe,CorePlugin.Util.getString("ObjectConverterUtil.Error_translating_results_from_data_type_to_a_byte[]._1",params)); //$NON-NLS-1$
} catch (SQLException sqe) {
final Object[] params = new Object[]{data.getClass().getName()};
throw new TeiidException(sqe,CorePlugin.Util.getString("ObjectConverterUtil.Error_translating_results_from_data_type_to_a_byte[]._2",params)); //$NON-NLS-1$
}
}
public static byte[] convertToByteArray(final Object data) throws TeiidException, IOException {
if (data instanceof InputStream) {
return convertToByteArray((InputStream) data);
} else if (data instanceof byte[]) {
return (byte[]) data;
} else if (data instanceof java.sql.Blob) {
return convertBlobToByteArray((java.sql.Blob) data);
} else if (data instanceof File) {
return convertFileToByteArray((File)data);
}
final Object[] params = new Object[]{data.getClass().getName()};
throw new TeiidException(CorePlugin.Util.getString("ObjectConverterUtil.Object_type_not_supported_for_object_conversion._3",params)); //$NON-NLS-1$
}
public static byte[] convertToByteArray(final InputStream is) throws IOException {
return convertToByteArray(is, -1);
}
/**
* Returns the given input stream's contents as a byte array.
* If a length is specified (ie. if length != -1), only length bytes
* are returned. Otherwise all bytes in the stream are returned.
* Note this does close the stream, even if not all bytes are written,
* because the buffering does not guarantee the end position.
* @throws IOException if a problem occurred reading the stream.
*/
public static byte[] convertToByteArray(final InputStream is, int length) throws IOException {
return convertToByteArray(is, length, true);
}
public static byte[] convertToByteArray(final InputStream is, int length, boolean close) throws IOException {
ByteArrayOutputStream out = new ByteArrayOutputStream();
write(out, is, length, close);
out.close();
return out.toByteArray();
}
public static int write(final OutputStream out, final InputStream is, byte[] l_buffer, int length) throws IOException {
return write(out, is, l_buffer, length, true);
}
public static int write(final OutputStream out, final InputStream is, byte[] l_buffer, int length, boolean close) throws IOException {
int writen = 0;
try {
int l_nbytes = 0; // Number of bytes read
int readLength = length;
if (length == -1) {
readLength = l_buffer.length;
}
else {
readLength = Math.min(length, l_buffer.length);
}
while ((l_nbytes = is.read(l_buffer, 0, readLength)) != -1) {
if (length != -1 && writen > length - l_nbytes) {
out.write(l_buffer, 0, writen + l_nbytes - length);
break;
}
out.write(l_buffer,0,l_nbytes);
writen += l_nbytes;
}
return writen;
} finally {
if (close) {
try {
is.close();
} finally {
out.close();
}
}
}
}
public static int write(final OutputStream out, final InputStream is, int length) throws IOException {
return write(out, is, length, true);
}
public static int write(final OutputStream out, final InputStream is, int length, boolean close) throws IOException {
return write(out, is, new byte[DEFAULT_READING_SIZE], length, close); // buffer holding bytes to be transferred
}
public static void write(final Writer out, final Reader is, int length) throws IOException {
int writen = 0;
try {
char[] l_buffer = new char[DEFAULT_READING_SIZE]; // buffer holding bytes to be transferred
int l_nbytes = 0; // Number of bytes read
while ((l_nbytes = is.read(l_buffer)) != -1) {
if (length != -1 && writen > length - l_nbytes) {
out.write(l_buffer, 0, writen + l_nbytes - length);
break;
}
out.write(l_buffer,0,l_nbytes);
writen += l_nbytes;
}
} finally {
try {
is.close();
} finally {
out.close();
}
}
}
public static InputStream convertToInputStream(byte[] data) {
ByteArrayInputStream bais = new ByteArrayInputStream(data);
InputStream isContent = new BufferedInputStream(bais);
return isContent;
}
public static InputStream convertToInputStream(final String data) {
return convertToInputStream(data.getBytes());
}
public static InputStream convertToInputStream(final char[] data) {
return convertToInputStream(new String(data));
}
public static void write(final InputStream is, final String fileName) throws IOException {
File f = new File(fileName);
write(is, f);
}
public static void write(final Reader reader, final String fileName) throws IOException {
File f = new File(fileName);
write(reader, f);
}
public static void write(final Reader reader, final File f) throws IOException {
f.getParentFile().mkdirs();
FileWriter fw = new FileWriter(f);
write(fw, reader, -1);
}
public static void write(final InputStream is, final File f) throws IOException {
f.getParentFile().mkdirs();
FileOutputStream fio = new FileOutputStream(f);
BufferedOutputStream bos = new BufferedOutputStream(fio);
write(bos, is, -1);
}
public static void write(byte[] data, final String fileName) throws Exception {
InputStream is = ObjectConverterUtil.convertToInputStream(data);
ObjectConverterUtil.write(is, fileName);
is.close();
}
public static void write(char[] data, final String fileName) throws Exception {
InputStream is = ObjectConverterUtil.convertToInputStream(data);
ObjectConverterUtil.write(is, fileName);
is.close();
}
/**
* Returns the given bytes as a char array using a given encoding (null means platform default).
*/
public static char[] bytesToChar(byte[] bytes, String encoding) throws IOException {
return convertToCharArray(new ByteArrayInputStream(bytes), bytes.length, encoding);
}
/**
* Returns the contents of the given file as a byte array.
* @throws IOException if a problem occurred reading the file.
*/
public static byte[] convertFileToByteArray(File file) throws IOException {
return convertToByteArray(new FileInputStream(file), (int) file.length());
}
/**
* Returns the contents of the given file as a char array.
* When encoding is null, then the platform default one is used
* @throws IOException if a problem occurred reading the file.
*/
public static char[] convertFileToCharArray(File file, String encoding) throws IOException {
InputStream stream = new FileInputStream(file);
return convertToCharArray(stream, (int) file.length(), encoding);
}
/**
* Returns the contents of the given file as a string.
* @throws IOException if a problem occurred reading the file.
*/
public static String convertFileToString(final File file) throws IOException {
return new String(convertFileToCharArray(file,null));
}
/**
* Returns the contents of the given InputStream as a string.
* @throws IOException if a problem occurred reading the file.
*/
public static String convertToString(final InputStream stream) throws IOException {
return new String(convertToCharArray(stream, -1, null));
}
/**
* Returns the given input stream's contents as a character array.
* If a length is specified (ie. if length != -1), only length chars
* are returned. Otherwise all chars in the stream are returned.
* Note this doesn't close the stream.
* @throws IOException if a problem occurred reading the stream.
*/
public static char[] convertToCharArray(InputStream stream, int length, String encoding)
throws IOException {
Reader r = null;
if (encoding == null) {
r = new InputStreamReader(stream);
} else {
r = new InputStreamReader(stream, encoding);
}
return convertToCharArray(r, length);
}
/**
* Returns the contents of the given zip entry as a byte array.
* @throws IOException if a problem occurred reading the zip entry.
*/
public static byte[] convertToByteArray(ZipEntry ze, ZipFile zip)
throws IOException {
return convertToByteArray(zip.getInputStream(ze), (int) ze.getSize());
}
public static String convertToString(Reader reader) throws IOException {
return new String(convertToCharArray(reader, Integer.MAX_VALUE));
}
public static char[] convertToCharArray(Reader reader, int length) throws IOException {
StringWriter sb = new StringWriter();
write(sb, reader, length);
return sb.toString().toCharArray();
}
}