+/*
+ * Copyright (C) 2007-2012 Mathieu Baudier
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
package org.argeo;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
+import java.io.Reader;
+import java.io.Writer;
/** Utilities to be used when APache COmmons IO is not available. */
public class StreamUtils {
+ private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;
- public static void copy(InputStream in, OutputStream out)
+ /*
+ * APACHE COMMONS IO (inspired)
+ */
+
+ /** @return the number of bytes */
+ public static Long copy(InputStream in, OutputStream out)
throws IOException {
- byte[] buf = new byte[8192];
+ Long count = 0l;
+ byte[] buf = new byte[DEFAULT_BUFFER_SIZE];
+ while (true) {
+ int length = in.read(buf);
+ if (length < 0)
+ break;
+ out.write(buf, 0, length);
+ count = count + length;
+ }
+ return count;
+ }
+
+ /** @return the number of chars */
+ public static Long copy(Reader in, Writer out) throws IOException {
+ Long count = 0l;
+ char[] buf = new char[DEFAULT_BUFFER_SIZE];
while (true) {
int length = in.read(buf);
if (length < 0)
break;
out.write(buf, 0, length);
+ count = count + length;
}
+ return count;
}
public static void closeQuietly(InputStream in) {
}
}
- private StreamUtils() {
+ public static void closeQuietly(Reader in) {
+ if (in != null)
+ try {
+ in.close();
+ } catch (Exception e) {
+ //
+ }
+ }
+ public static void closeQuietly(Writer out) {
+ if (out != null)
+ try {
+ out.close();
+ } catch (Exception e) {
+ //
+ }
+ }
+
+ /*
+ * APACHE COMMONS CODEC (forked)
+ */
+ /**
+ * Used to build output as Hex
+ */
+ private static final char[] DIGITS_LOWER = { '0', '1', '2', '3', '4', '5',
+ '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+
+ /**
+ * Used to build output as Hex
+ */
+ private static final char[] DIGITS_UPPER = { '0', '1', '2', '3', '4', '5',
+ '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
+
+ /**
+ * Converts an array of bytes into a String representing the hexadecimal
+ * values of each byte in order. The returned String will be double the
+ * length of the passed array, as it takes two characters to represent any
+ * given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @return A String containing hexadecimal characters
+ * @since 1.4
+ */
+ public static String encodeHexString(byte[] data) {
+ return new String(encodeHex(data));
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @return A char[] containing hexadecimal characters
+ */
+ public static char[] encodeHex(byte[] data) {
+ return encodeHex(data, true);
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @param toLowerCase
+ * <code>true</code> converts to lowercase, <code>false</code> to
+ * uppercase
+ * @return A char[] containing hexadecimal characters
+ * @since 1.4
+ */
+ public static char[] encodeHex(byte[] data, boolean toLowerCase) {
+ return encodeHex(data, toLowerCase ? DIGITS_LOWER : DIGITS_UPPER);
+ }
+
+ /**
+ * Converts an array of bytes into an array of characters representing the
+ * hexadecimal values of each byte in order. The returned array will be
+ * double the length of the passed array, as it takes two characters to
+ * represent any given byte.
+ *
+ * @param data
+ * a byte[] to convert to Hex characters
+ * @param toDigits
+ * the output alphabet
+ * @return A char[] containing hexadecimal characters
+ * @since 1.4
+ */
+ protected static char[] encodeHex(byte[] data, char[] toDigits) {
+ int l = data.length;
+ char[] out = new char[l << 1];
+ // two characters form the hex value.
+ for (int i = 0, j = 0; i < l; i++) {
+ out[j++] = toDigits[(0xF0 & data[i]) >>> 4];
+ out[j++] = toDigits[0x0F & data[i]];
+ }
+ return out;
}
}
projects / lgpl / argeo-commons.git / blobdiff