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removed forgotten pre-JDK 1.4 stuff 

added protection against null pointer exceptions

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_0@712136 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Luc Maisonobe 2008-11-07 14:35:16 +00:00
parent 91ec7946e9
commit 4a2d68685b
1 changed files with 9 additions and 25 deletions
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32
src/java/org/apache/commons/math/MathException.java
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@ -35,24 +35,8 @@ import java.util.ResourceBundle;
*/ */
public class MathException extends Exception { public class MathException extends Exception {
/** Serializable version identifier */ /** Serializable version identifier. */
private static final long serialVersionUID = 1428666635974829194L; private static final long serialVersionUID = 5924076008552401454L;
/**
* Does JDK support nested exceptions?
*/
private static final boolean JDK_SUPPORTS_NESTED;
static {
boolean flag = false;
try {
Throwable.class.getDeclaredMethod("getCause", new Class[0]);
flag = true;
} catch (NoSuchMethodException ex) {
flag = false;
}
JDK_SUPPORTS_NESTED = flag;
}
/** Cache for resources bundle. */ /** Cache for resources bundle. */
private static ResourceBundle cachedResources = null; private static ResourceBundle cachedResources = null;
@ -105,7 +89,7 @@ public class MathException extends Exception {
* @return a message string * @return a message string
*/ */
private static String buildMessage(String pattern, Object[] arguments, Locale locale) { private static String buildMessage(String pattern, Object[] arguments, Locale locale) {
return new MessageFormat(translate(pattern, locale), locale).format(arguments); return (pattern == null) ? "" : new MessageFormat(translate(pattern, locale), locale).format(arguments);
} }
/** /**
@ -115,7 +99,7 @@ public class MathException extends Exception {
public MathException() { public MathException() {
super(); super();
this.pattern = null; this.pattern = null;
this.arguments = new Object[0]; this.arguments = null;
} }
/** /**
@ -128,7 +112,7 @@ public class MathException extends Exception {
public MathException(String pattern, Object[] arguments) { public MathException(String pattern, 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();
} }
/** /**
@ -157,7 +141,7 @@ public class MathException extends Exception {
public MathException(String pattern, Object[] arguments, Throwable rootCause) { public MathException(String pattern, Object[] arguments, 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.
@ -175,7 +159,7 @@ public class MathException extends Exception {
* @since 1.2 * @since 1.2
*/ */
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.
@ -186,7 +170,7 @@ public class MathException extends Exception {
* @since 1.2 * @since 1.2
*/ */
public String getMessage(Locale locale) { public String getMessage(Locale locale) {
return (pattern == null) ? null : buildMessage(pattern, arguments, locale); return buildMessage(pattern, arguments, locale);
} }
/** {@inheritDoc} */ /** {@inheritDoc} */