Java tutorial
/* * Licensed to ElasticSearch and Shay Banon under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. ElasticSearch licenses this * file to you 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.elasticsearch.common.math; import java.io.EOFException; import java.io.IOException; import java.io.PrintStream; import java.io.PrintWriter; import java.text.MessageFormat; import java.text.ParseException; import java.util.*; /** * Base class for commons-math unchecked exceptions. * * @version $Revision: 822850 $ $Date: 2009-10-07 14:56:42 -0400 (Wed, 07 Oct 2009) $ * @since 2.0 */ public class MathRuntimeException extends RuntimeException { /** * Serializable version identifier. */ private static final long serialVersionUID = -5128983364075381060L; /** * Pattern used to build the message. */ private final String pattern; /** * Arguments used to build the message. */ private final Object[] arguments; /** * Constructs a new <code>MathRuntimeException</code> with specified * formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments */ public MathRuntimeException(final String pattern, final Object... arguments) { this.pattern = pattern; this.arguments = (arguments == null) ? new Object[0] : arguments.clone(); } /** * Constructs a new <code>MathRuntimeException</code> with specified * nested <code>Throwable</code> root cause. * * @param rootCause the exception or error that caused this exception * to be thrown. */ public MathRuntimeException(final Throwable rootCause) { super(rootCause); this.pattern = getMessage(); this.arguments = new Object[0]; } /** * Constructs a new <code>MathRuntimeException</code> with specified * formatted detail message and nested <code>Throwable</code> root cause. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param rootCause the exception or error that caused this exception * to be thrown. * @param pattern format specifier * @param arguments format arguments */ public MathRuntimeException(final Throwable rootCause, final String pattern, final Object... arguments) { super(rootCause); this.pattern = pattern; this.arguments = (arguments == null) ? new Object[0] : arguments.clone(); } /** * Translate a string to a given locale. * * @param s string to translate * @param locale locale into which to translate the string * @return translated string or original string * for unsupported locales or unknown strings */ private static String translate(final String s, final Locale locale) { try { ResourceBundle bundle = ResourceBundle.getBundle("org.apache.commons.math.MessagesResources", locale); if (bundle.getLocale().getLanguage().equals(locale.getLanguage())) { // the value of the resource is the translated string return bundle.getString(s); } } catch (MissingResourceException mre) { // do nothing here } // the locale is not supported or the resource is unknown // don't translate and fall back to using the string as is return s; } /** * Builds a message string by from a pattern and its arguments. * * @param locale Locale in which the message should be translated * @param pattern format specifier * @param arguments format arguments * @return a message string */ private static String buildMessage(final Locale locale, final String pattern, final Object... arguments) { return (pattern == null) ? "" : new MessageFormat(translate(pattern, locale), locale).format(arguments); } /** * Gets the pattern used to build the message of this throwable. * * @return the pattern used to build the message of this throwable */ public String getPattern() { return pattern; } /** * Gets the arguments used to build the message of this throwable. * * @return the arguments used to build the message of this throwable */ public Object[] getArguments() { return arguments.clone(); } /** * Gets the message in a specified locale. * * @param locale Locale in which the message should be translated * @return localized message */ public String getMessage(final Locale locale) { return buildMessage(locale, pattern, arguments); } /** * {@inheritDoc} */ @Override public String getMessage() { return getMessage(Locale.US); } /** * {@inheritDoc} */ @Override public String getLocalizedMessage() { return getMessage(Locale.getDefault()); } /** * Prints the stack trace of this exception to the standard error stream. */ @Override public void printStackTrace() { printStackTrace(System.err); } /** * Prints the stack trace of this exception to the specified stream. * * @param out the <code>PrintStream</code> to use for output */ @Override public void printStackTrace(final PrintStream out) { synchronized (out) { PrintWriter pw = new PrintWriter(out, false); printStackTrace(pw); // Flush the PrintWriter before it's GC'ed. pw.flush(); } } /** * Constructs a new <code>ArithmeticException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static ArithmeticException createArithmeticException(final String pattern, final Object... arguments) { return new ArithmeticException() { /** Serializable version identifier. */ private static final long serialVersionUID = 7705628723242533939L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>ArrayIndexOutOfBoundsException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static ArrayIndexOutOfBoundsException createArrayIndexOutOfBoundsException(final String pattern, final Object... arguments) { return new ArrayIndexOutOfBoundsException() { /** Serializable version identifier. */ private static final long serialVersionUID = -3394748305449283486L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>EOFException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static EOFException createEOFException(final String pattern, final Object... arguments) { return new EOFException() { /** Serializable version identifier. */ private static final long serialVersionUID = 279461544586092584L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>IOException</code> with specified nested * <code>Throwable</code> root cause. * <p>This factory method allows chaining of other exceptions within an * <code>IOException</code> even for Java 5. The constructor for * <code>IOException</code> with a cause parameter was introduced only * with Java 6.</p> * * @param rootCause the exception or error that caused this exception * to be thrown. * @return built exception */ public static IOException createIOException(final Throwable rootCause) { IOException ioe = new IOException(rootCause.getLocalizedMessage()); ioe.initCause(rootCause); return ioe; } /** * Constructs a new <code>IllegalArgumentException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static IllegalArgumentException createIllegalArgumentException(final String pattern, final Object... arguments) { return new IllegalArgumentException() { /** Serializable version identifier. */ private static final long serialVersionUID = -6555453980658317913L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>IllegalArgumentException</code> with specified nested * <code>Throwable</code> root cause. * * @param rootCause the exception or error that caused this exception * to be thrown. * @return built exception */ public static IllegalArgumentException createIllegalArgumentException(final Throwable rootCause) { IllegalArgumentException iae = new IllegalArgumentException(rootCause.getLocalizedMessage()); iae.initCause(rootCause); return iae; } /** * Constructs a new <code>IllegalStateException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static IllegalStateException createIllegalStateException(final String pattern, final Object... arguments) { return new IllegalStateException() { /** Serializable version identifier. */ private static final long serialVersionUID = -95247648156277208L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>ConcurrentModificationException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static ConcurrentModificationException createConcurrentModificationException(final String pattern, final Object... arguments) { return new ConcurrentModificationException() { /** Serializable version identifier. */ private static final long serialVersionUID = 6134247282754009421L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>NoSuchElementException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static NoSuchElementException createNoSuchElementException(final String pattern, final Object... arguments) { return new NoSuchElementException() { /** Serializable version identifier. */ private static final long serialVersionUID = 7304273322489425799L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>NullPointerException</code> with specified formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static NullPointerException createNullPointerException(final String pattern, final Object... arguments) { return new NullPointerException() { /** Serializable version identifier. */ private static final long serialVersionUID = -3075660477939965216L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Constructs a new <code>ParseException</code> with specified * formatted detail message. * Message formatting is delegated to {@link java.text.MessageFormat}. * * @param offset offset at which error occurred * @param pattern format specifier * @param arguments format arguments * @return built exception */ public static ParseException createParseException(final int offset, final String pattern, final Object... arguments) { return new ParseException(null, offset) { /** Serializable version identifier. */ private static final long serialVersionUID = -1103502177342465975L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, arguments); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, arguments); } }; } /** * Create an {@link java.lang.RuntimeException} for an internal error. * * @param cause underlying cause * @return an {@link java.lang.RuntimeException} for an internal error */ public static RuntimeException createInternalError(final Throwable cause) { final String pattern = "internal error, please fill a bug report at {0}"; final String argument = "https://issues.apache.org/jira/browse/MATH"; return new RuntimeException() { /** Serializable version identifier. */ private static final long serialVersionUID = -201865440834027016L; /** {@inheritDoc} */ @Override public String getMessage() { return buildMessage(Locale.US, pattern, argument); } /** {@inheritDoc} */ @Override public String getLocalizedMessage() { return buildMessage(Locale.getDefault(), pattern, argument); } }; } }