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LANG-487 - Make default style thread-safe 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@829991 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Stephen Colebourne 2009-10-26 21:56:46 +00:00
parent 61800cce67
commit d55299a055
1 changed files with 35 additions and 22 deletions
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57
src/java/org/apache/commons/lang/builder/ToStringBuilder.java
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@ -94,26 +94,50 @@ public class ToStringBuilder {
/**
* The default style of output to use.
*/
private static ToStringStyle defaultStyle = ToStringStyle.DEFAULT_STYLE;
private static volatile ToStringStyle defaultStyle = ToStringStyle.DEFAULT_STYLE;
//----------------------------------------------------------------------------
/**
* <p>Gets the default <code>ToStringStyle</code> to use.</p>
*
* <p>This could allow the <code>ToStringStyle</code> to be
* controlled for an entire application with one call.</p>
*
* <p>This might be used to have a verbose
* <code>ToStringStyle</code> during development and a compact
* <code>ToStringStyle</code> in production.</p>
*
* @return the default <code>ToStringStyle</code>
* <p>This method gets a singleton default value, typically for the whole JVM.
* Changing this default should generally only be done during application startup.
* It is recommended to pass a <code>ToStringStyle</code> to the constructor instead
* of using this global default.</p>
*
* <p>This method is thread-safe, as a <code>volatile</code variable is used internally.</p>
*
* <p>One reason for changing the default could be to have a verbose style during
* development and a compact style in production.</p>
*
* @return the default <code>ToStringStyle</code>, never null
*/
public static ToStringStyle getDefaultStyle() {
return defaultStyle;
}
/**
* <p>Sets the default <code>ToStringStyle</code> to use.</p>
*
* <p>This method sets a singleton default value, typically for the whole JVM.
* Changing this default should generally only be done during application startup.
* It is recommended to pass a <code>ToStringStyle</code> to the constructor instead
* of changing this global default.</p>
*
* <p>This method is thread-safe, as a <code>volatile</code variable is used internally.</p>
*
* @param style the default <code>ToStringStyle</code>
* @throws IllegalArgumentException if the style is <code>null</code>
*/
public static void setDefaultStyle(ToStringStyle style) {
if (style == null) {
throw new IllegalArgumentException("The style must not be null");
}
defaultStyle = style;
}
//----------------------------------------------------------------------------
/**
* <p>Forwards to <code>ReflectionToStringBuilder</code>.</p>
*
@ -169,18 +193,7 @@ public class ToStringBuilder {
return ReflectionToStringBuilder.toString(object, style, outputTransients, false, reflectUpToClass);
}
/**
* <p>Sets the default <code>ToStringStyle</code> to use.</p>
*
* @param style the default <code>ToStringStyle</code>
* @throws IllegalArgumentException if the style is <code>null</code>
*/
public static void setDefaultStyle(ToStringStyle style) {
if (style == null) {
throw new IllegalArgumentException("The style must not be null");
}
defaultStyle = style;
}
//----------------------------------------------------------------------------
/**
* Current toString buffer.
@ -208,7 +221,7 @@ public class ToStringBuilder {
* <code>null</code>
*/
public ToStringBuilder(Object object) {
this(object, getDefaultStyle(), null);
this(object, null, null);
}
/**