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added factory methods to simplify creation of runtime exceptions with helpful messages 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_0@712140 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Luc Maisonobe 2008-11-07 14:42:26 +00:00
parent 4a2d68685b
commit 234e529e70
1 changed files with 138 additions and 17 deletions
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155
src/java/org/apache/commons/math/MathRuntimeException.java
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@ -16,9 +16,11 @@
*/ */
package org.apache.commons.math; package org.apache.commons.math;
import java.io.EOFException;
import java.io.PrintStream; import java.io.PrintStream;
import java.io.PrintWriter; import java.io.PrintWriter;
import java.text.MessageFormat; import java.text.MessageFormat;
import java.text.ParseException;
import java.util.Locale; import java.util.Locale;
import java.util.MissingResourceException; import java.util.MissingResourceException;
import java.util.ResourceBundle; import java.util.ResourceBundle;
@ -32,7 +34,7 @@ import java.util.ResourceBundle;
public class MathRuntimeException extends RuntimeException { public class MathRuntimeException extends RuntimeException {
/** Serializable version identifier. */ /** Serializable version identifier. */
private static final long serialVersionUID = -2880601850253924272L; private static final long serialVersionUID = 8560172512507661982L;
/** Cache for resources bundle. */ /** Cache for resources bundle. */
private static ResourceBundle cachedResources = null; private static ResourceBundle cachedResources = null;
@ -86,19 +88,9 @@ public class MathRuntimeException extends RuntimeException {
*/ */
private static String buildMessage(final String pattern, final Object[] arguments, private static String buildMessage(final String pattern, final Object[] arguments,
final Locale locale) { final Locale locale) {
return new MessageFormat(translate(pattern, locale), locale).format(arguments); return (pattern == null) ? "" : new MessageFormat(translate(pattern, locale), locale).format(arguments);
} }
/**
* Constructs a new <code>MathRuntimeException</code> with no
* detail message.
*/
public MathRuntimeException() {
super();
this.pattern = null;
this.arguments = new Object[0];
}
/** /**
* Constructs a new <code>MathRuntimeException</code> with specified * Constructs a new <code>MathRuntimeException</code> with specified
* formatted detail message. * formatted detail message.
@ -109,7 +101,7 @@ public class MathRuntimeException extends RuntimeException {
public MathRuntimeException(final String pattern, final Object[] arguments) { public MathRuntimeException(final String pattern, final Object[] arguments) {
super(buildMessage(pattern, arguments, Locale.US)); super(buildMessage(pattern, arguments, Locale.US));
this.pattern = pattern; this.pattern = pattern;
this.arguments = (Object[]) arguments.clone(); this.arguments = (arguments == null) ? new Object[0] : arguments.clone();
} }
/** /**
@ -138,7 +130,7 @@ public class MathRuntimeException extends RuntimeException {
final Throwable rootCause) { final Throwable rootCause) {
super(buildMessage(pattern, arguments, Locale.US), rootCause); super(buildMessage(pattern, arguments, Locale.US), rootCause);
this.pattern = pattern; this.pattern = pattern;
this.arguments = (Object[]) arguments.clone(); this.arguments = (arguments == null) ? new Object[0] : arguments.clone();
} }
/** Gets the pattern used to build the message of this throwable. /** Gets the pattern used to build the message of this throwable.
@ -154,7 +146,7 @@ public class MathRuntimeException extends RuntimeException {
* @return the arguments used to build the message of this throwable * @return the arguments used to build the message of this throwable
*/ */
public Object[] getArguments() { public Object[] getArguments() {
return (Object[]) arguments.clone(); return arguments.clone();
} }
/** Gets the message in a specified locale. /** Gets the message in a specified locale.
@ -164,7 +156,7 @@ public class MathRuntimeException extends RuntimeException {
* @return localized message * @return localized message
*/ */
public String getMessage(final Locale locale) { public String getMessage(final Locale locale) {
return (pattern == null) ? null : buildMessage(pattern, arguments, locale); return buildMessage(pattern, arguments, locale);
} }
/** {@inheritDoc} */ /** {@inheritDoc} */
@ -192,5 +184,134 @@ public class MathRuntimeException extends RuntimeException {
pw.flush(); 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
*/
public static ArithmeticException createArithmeticException(final String pattern,
final Object[] arguments) {
return new ArithmeticException(buildMessage(pattern, arguments, Locale.US)) {
/** Serializable version identifier. */
private static final long serialVersionUID = 7705628723242533939L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
/**
* 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
*/
public static ArrayIndexOutOfBoundsException createArrayIndexOutOfBoundsException(final String pattern,
final Object[] arguments) {
return new ArrayIndexOutOfBoundsException(buildMessage(pattern, arguments, Locale.US)) {
/** Serializable version identifier. */
private static final long serialVersionUID = 8077627622976962141L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
/**
* 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
*/
public static EOFException createEOFException(final String pattern,
final Object[] arguments) {
return new EOFException(buildMessage(pattern, arguments, Locale.US)) {
/** Serializable version identifier. */
private static final long serialVersionUID = 279461544586092584L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
/**
* 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
*/
public static IllegalArgumentException createIllegalArgumentException(final String pattern,
final Object[] arguments) {
return new IllegalArgumentException(buildMessage(pattern, arguments, Locale.US)) {
/** Serializable version identifier. */
private static final long serialVersionUID = -7537852425838457684L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
/**
* 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
*/
public static IllegalStateException createIllegalStateException(final String pattern,
final Object[] arguments) {
return new IllegalStateException(buildMessage(pattern, arguments, Locale.US)) {
/** Serializable version identifier. */
private static final long serialVersionUID = 5173599768297434381L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
/**
* Constructs a new <code>ParseException</code> with specified
* formatted detail message.
* Message formatting is delegated to {@link java.text.MessageFormat}.
* @param pattern format specifier
* @param arguments format arguments
* @param offset offset at which error occurred
*/
public static ParseException createParseException(final String pattern,
final Object[] arguments,
final int offset) {
return new ParseException(buildMessage(pattern, arguments, Locale.US), offset) {
/** Serializable version identifier. */
private static final long serialVersionUID = -1103502177342465975L;
/** {@inheritDoc} */
public String getLocalizedMessage() {
return buildMessage(pattern, arguments, Locale.getDefault());
}
};
}
} }