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- /*
- * Copyright 2011 gitblit.com.
- *
- * 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 com.gitblit.utils;
-
- import java.text.DecimalFormat;
- import java.text.FieldPosition;
- import java.text.Format;
- import java.text.ParsePosition;
-
- /**
- * A formatter for formatting byte sizes. For example, formatting 12345 byes
- * results in "12.1 K" and 1234567 results in "1.18 MB".
- *
- */
- public class ByteFormat extends Format {
-
- private static final long serialVersionUID = 1L;
-
- public ByteFormat() {
- }
-
- // Implemented from the Format class
-
- /**
- * Formats a long which represent a number of bytes.
- */
- public String format(long bytes) {
- return format(Long.valueOf(bytes));
- }
-
- /**
- * Formats a long which represent a number of kilobytes.
- */
- public String formatKB(long kilobytes) {
- return format(Long.valueOf(kilobytes * 1024));
- }
-
- /**
- * Format the given object (must be a Long).
- *
- * @param obj
- * assumed to be the number of bytes as a Long.
- * @param buf
- * the StringBuffer to append to.
- * @param pos
- * @return A formatted string representing the given bytes in more
- * human-readable form.
- */
- public StringBuffer format(Object obj, StringBuffer buf, FieldPosition pos) {
- if (obj instanceof Long) {
- long numBytes = ((Long) obj).longValue();
- if (numBytes < 1024) {
- DecimalFormat formatter = new DecimalFormat("#,##0");
- buf.append(formatter.format((double) numBytes)).append(" b");
- } else if (numBytes < 1024 * 1024) {
- DecimalFormat formatter = new DecimalFormat("#,##0.0");
- buf.append(formatter.format((double) numBytes / 1024.0)).append(" KB");
- } else if (numBytes < 1024 * 1024 * 1024) {
- DecimalFormat formatter = new DecimalFormat("#,##0.0");
- buf.append(formatter.format((double) numBytes / (1024.0 * 1024.0))).append(" MB");
- } else {
- DecimalFormat formatter = new DecimalFormat("#,##0.0");
- buf.append(formatter.format((double) numBytes / (1024.0 * 1024.0 * 1024.0))).append(" GB");
- }
- }
- return buf;
- }
-
- /**
- * In this implementation, returns null always.
- *
- * @param source
- * @param pos
- * @return returns null in this implementation.
- */
- public Object parseObject(String source, ParsePosition pos) {
- return null;
- }
- }
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