Commons Math example source code file (MathRuntimeException.java)
The Commons Math MathRuntimeException.java source code/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.commons.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.ConcurrentModificationException;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.NoSuchElementException;
import java.util.ResourceBundle;
/**
* 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 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 with specified
* nested <code>Throwable 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 with specified
* formatted detail message and nested <code>Throwable 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 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 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 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 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 with specified nested
* <code>Throwable root cause.
* <p>This factory method allows chaining of other exceptions within an
* <code>IOException even for Java 5. The constructor for
* <code>IOException 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 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 with specified nested
* <code>Throwable 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 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 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 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 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 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);
}
};
}
}
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