/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2010 Sun Microsystems, Inc.
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* Portions copyright 2014 ForgeRock AS
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*/
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package com.forgerock.opendj.cli;
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import static com.forgerock.opendj.cli.CliMessages.*;
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import static com.forgerock.opendj.util.StaticUtils.EOL;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import java.util.StringTokenizer;
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import org.forgerock.i18n.LocalizableMessage;
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/**
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* This class provides utility functions for all the client side tools.
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*/
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final public class Utils {
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/** Platform appropriate line separator. */
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static public final String LINE_SEPARATOR = System.getProperty("line.separator");
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/**
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* The column at which to wrap long lines of output in the command-line
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* tools.
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*/
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static public final int MAX_LINE_WIDTH;
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static {
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int columns = 80;
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try {
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final String s = System.getenv("COLUMNS");
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if (s != null) {
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columns = Integer.parseInt(s);
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}
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} catch (final Exception e) {
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// Do nothing.
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}
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MAX_LINE_WIDTH = columns - 1;
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}
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/**
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* Filters the provided value to ensure that it is appropriate for use as an
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* exit code. Exit code values are generally only allowed to be between 0
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* and 255, so any value outside of this range will be converted to 255,
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* which is the typical exit code used to indicate an overflow value.
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*
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* @param exitCode
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* The exit code value to be processed.
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* @return An integer value between 0 and 255, inclusive. If the provided
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* exit code was already between 0 and 255, then the original value
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* will be returned. If the provided value was out of this range,
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* then 255 will be returned.
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*/
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public static int filterExitCode(final int exitCode) {
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if (exitCode < 0) {
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return 255;
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} else if (exitCode > 255) {
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return 255;
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} else {
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return exitCode;
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}
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}
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/**
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* Read the data from the specified file and return it in a byte array.
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*
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* @param filePath
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* The path to the file that should be read.
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* @return A byte array containing the contents of the requested file.
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* @throws IOException
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* If a problem occurs while trying to read the specified file.
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*/
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public static byte[] readBytesFromFile(final String filePath) throws IOException {
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byte[] val = null;
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FileInputStream fis = null;
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try {
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final File file = new File(filePath);
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fis = new FileInputStream(file);
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final long length = file.length();
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val = new byte[(int) length];
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// Read in the bytes
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int offset = 0;
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int numRead = 0;
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while (offset < val.length
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&& (numRead = fis.read(val, offset, val.length - offset)) >= 0) {
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offset += numRead;
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}
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// Ensure all the bytes have been read in
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if (offset < val.length) {
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throw new IOException("Could not completely read file " + filePath);
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}
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return val;
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} finally {
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if (fis != null) {
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fis.close();
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}
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}
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}
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/**
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* Retrieves a user-friendly string that indicates the length of time (in
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* days, hours, minutes, and seconds) in the specified number of seconds.
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*
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* @param numSeconds
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* The number of seconds to be converted to a more user-friendly
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* value.
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* @return The user-friendly representation of the specified number of
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* seconds.
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*/
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public static LocalizableMessage secondsToTimeString(final int numSeconds) {
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if (numSeconds < 60) {
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// We can express it in seconds.
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return INFO_TIME_IN_SECONDS.get(numSeconds);
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} else if (numSeconds < 3600) {
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// We can express it in minutes and seconds.
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final int m = numSeconds / 60;
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final int s = numSeconds % 60;
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return INFO_TIME_IN_MINUTES_SECONDS.get(m, s);
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} else if (numSeconds < 86400) {
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// We can express it in hours, minutes, and seconds.
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final int h = numSeconds / 3600;
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final int m = (numSeconds % 3600) / 60;
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final int s = numSeconds % 3600 % 60;
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return INFO_TIME_IN_HOURS_MINUTES_SECONDS.get(h, m, s);
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} else {
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// We can express it in days, hours, minutes, and seconds.
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final int d = numSeconds / 86400;
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final int h = (numSeconds % 86400) / 3600;
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final int m = (numSeconds % 86400 % 3600) / 60;
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final int s = numSeconds % 86400 % 3600 % 60;
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return INFO_TIME_IN_DAYS_HOURS_MINUTES_SECONDS.get(d, h, m, s);
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}
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}
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/**
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* Inserts line breaks into the provided buffer to wrap text at no more than
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* the specified column width. Wrapping will only be done at space
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* boundaries and if there are no spaces within the specified width, then
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* wrapping will be performed at the first space after the specified column.
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*
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* @param message
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* The message to be wrapped.
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* @param width
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* The maximum number of characters to allow on a line if there
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* is a suitable breaking point.
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* @return The wrapped text.
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*/
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public static String wrapText(final LocalizableMessage message, final int width) {
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return wrapText(message.toString(), width, 0);
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}
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/**
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* Inserts line breaks into the provided buffer to wrap text at no more than
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* the specified column width. Wrapping will only be done at space
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* boundaries and if there are no spaces within the specified width, then
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* wrapping will be performed at the first space after the specified column.
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* In addition each line will be indented by the specified amount.
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*
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* @param message
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* The message to be wrapped.
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* @param width
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* The maximum number of characters to allow on a line if there
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* is a suitable breaking point (including any indentation).
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* @param indent
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* The number of columns to indent each line.
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* @return The wrapped text.
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*/
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public static String wrapText(final LocalizableMessage message, final int width, final int indent) {
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return wrapText(message.toString(), width, indent);
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}
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/**
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* Inserts line breaks into the provided buffer to wrap text at no more than
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* the specified column width. Wrapping will only be done at space
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* boundaries and if there are no spaces within the specified width, then
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* wrapping will be performed at the first space after the specified column.
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*
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* @param text
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* The text to be wrapped.
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* @param width
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* The maximum number of characters to allow on a line if there
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* is a suitable breaking point.
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* @return The wrapped text.
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*/
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public static String wrapText(final String text, final int width) {
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return wrapText(text, width, 0);
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}
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/**
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* Inserts line breaks into the provided buffer to wrap text at no more than
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* the specified column width. Wrapping will only be done at space
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* boundaries and if there are no spaces within the specified width, then
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* wrapping will be performed at the first space after the specified column.
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* In addition each line will be indented by the specified amount.
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*
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* @param text
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* The text to be wrapped.
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* @param width
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* The maximum number of characters to allow on a line if there
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* is a suitable breaking point (including any indentation).
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* @param indent
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* The number of columns to indent each line.
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* @return The wrapped text.
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*/
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public static String wrapText(final String text, int width, final int indent) {
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// Calculate the real width and indentation padding.
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width -= indent;
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final StringBuilder pb = new StringBuilder();
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for (int i = 0; i < indent; i++) {
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pb.append(' ');
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}
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final String padding = pb.toString();
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final StringBuilder buffer = new StringBuilder();
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if (text != null) {
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final StringTokenizer lineTokenizer = new StringTokenizer(text, "\r\n", true);
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while (lineTokenizer.hasMoreTokens()) {
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final String line = lineTokenizer.nextToken();
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if (line.equals("\r") || line.equals("\n")) {
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// It's an end-of-line character, so append it as-is.
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buffer.append(line);
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} else if (line.length() <= width) {
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// The line fits in the specified width, so append it as-is.
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buffer.append(padding);
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buffer.append(line);
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} else {
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// The line doesn't fit in the specified width, so it needs
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// to be wrapped. Do so at space boundaries.
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StringBuilder lineBuffer = new StringBuilder();
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StringBuilder delimBuffer = new StringBuilder();
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final StringTokenizer wordTokenizer = new StringTokenizer(line, " ", true);
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while (wordTokenizer.hasMoreTokens()) {
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final String word = wordTokenizer.nextToken();
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if (word.equals(" ")) {
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// It's a space, so add it to the delim buffer only
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// if the line buffer is not empty.
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if (lineBuffer.length() > 0) {
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delimBuffer.append(word);
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}
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} else if (word.length() > width) {
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// This is a long word that can't be wrapped, so
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// we'll just have to make do.
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if (lineBuffer.length() > 0) {
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buffer.append(padding);
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buffer.append(lineBuffer);
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buffer.append(EOL);
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lineBuffer = new StringBuilder();
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}
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buffer.append(padding);
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buffer.append(word);
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if (wordTokenizer.hasMoreTokens()) {
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// The next token must be a space, so remove it.
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// If there are still more tokens after that, then append an
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// EOL.
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wordTokenizer.nextToken();
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if (wordTokenizer.hasMoreTokens()) {
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buffer.append(EOL);
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}
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}
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if (delimBuffer.length() > 0) {
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delimBuffer = new StringBuilder();
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}
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} else {
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// It's not a space, so see if we can fit it on the
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// current line.
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final int newLineLength =
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lineBuffer.length() + delimBuffer.length() + word.length();
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if (newLineLength < width) {
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// It does fit on the line, so add it.
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lineBuffer.append(delimBuffer).append(word);
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if (delimBuffer.length() > 0) {
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delimBuffer = new StringBuilder();
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}
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} else {
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// It doesn't fit on the line, so end the
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// current line and start a new one.
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buffer.append(padding);
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buffer.append(lineBuffer);
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buffer.append(EOL);
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lineBuffer = new StringBuilder();
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lineBuffer.append(word);
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if (delimBuffer.length() > 0) {
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delimBuffer = new StringBuilder();
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}
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}
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}
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}
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// If there's anything left in the line buffer, then add it
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// to the final buffer.
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buffer.append(padding);
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buffer.append(lineBuffer);
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}
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}
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}
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return buffer.toString();
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}
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/**
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* Checks that the java version.
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*
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* @throws CLIException
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* If the java version we are running on is not compatible.
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*/
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public static void checkJavaVersion() throws CLIException {
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final String version = System.getProperty("java.specification.version");
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if (!(Float.valueOf(version) >= 1.6)) {
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final String javaBin = System.getProperty("java.home") + File.separator + "bin" + File.separator + "java";
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throw new CLIException(ERR_INCOMPATIBLE_JAVA_VERSION.get("1.6", version, javaBin), null);
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}
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}
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/**
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* Returns the default host name.
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*
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* @return The default host name or empty string if the host name cannot be resolved.
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*/
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public static String getDefaultHostName() {
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try {
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return InetAddress.getLocalHost().getHostName();
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} catch (UnknownHostException e) {
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// Fails.
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}
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String host = System.getenv("COMPUTERNAME"); // Windows.
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if (host != null) {
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return host;
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}
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host = System.getenv("HOSTNAME"); // Unix.
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if (host != null) {
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return host;
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}
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return "";
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}
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// Prevent instantiation.
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private Utils() {
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// Do nothing.
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}
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}
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