craigmcc 02/03/17 16:52:41
Modified: beanutils/src/java/org/apache/commons/beanutils
ConvertUtils.java
Log:
Add the ability to register custom Converter instances for String->Object
conversions performed by ConvertUtils.convert(Object, Class) and
ConvertUtils.convert(Object[], Class). While this version works fine, I'm
going to generalize it shortly by making all of the standard conversion
methods into pluggable Converters, so you can replace (for example) the
standard String->Integer converter if you want to.
Submitted by: Based on a patch submitted by
Klaasjan Brand <[EMAIL PROTECTED]>
Revision Changes Path
1.6 +89 -4
jakarta-commons/beanutils/src/java/org/apache/commons/beanutils/ConvertUtils.java
Index: ConvertUtils.java
===================================================================
RCS file:
/home/cvs/jakarta-commons/beanutils/src/java/org/apache/commons/beanutils/ConvertUtils.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- ConvertUtils.java 23 Jan 2002 22:35:58 -0000 1.5
+++ ConvertUtils.java 18 Mar 2002 00:52:41 -0000 1.6
@@ -1,7 +1,7 @@
/*
- * $Header:
/home/cvs/jakarta-commons/beanutils/src/java/org/apache/commons/beanutils/ConvertUtils.java,v
1.5 2002/01/23 22:35:58 sanders Exp $
- * $Revision: 1.5 $
- * $Date: 2002/01/23 22:35:58 $
+ * $Header:
/home/cvs/jakarta-commons/beanutils/src/java/org/apache/commons/beanutils/ConvertUtils.java,v
1.6 2002/03/18 00:52:41 craigmcc Exp $
+ * $Revision: 1.6 $
+ * $Date: 2002/03/18 00:52:41 $
*
* ====================================================================
*
@@ -64,6 +64,7 @@
import java.lang.reflect.Array;
+import org.apache.commons.collections.FastHashMap;
/**
@@ -77,7 +78,7 @@
* @author Craig R. McClanahan
* @author Ralph Schaer
* @author Chris Audley
- * @version $Revision: 1.5 $ $Date: 2002/01/23 22:35:58 $
+ * @version $Revision: 1.6 $ $Date: 2002/03/18 00:52:41 $
*/
public class ConvertUtils {
@@ -202,6 +203,13 @@
/**
+ * The set of custom {@link Converter}s that can be used to convert Strings
+ * into objects of a specified Class, keyed by the destination Class.
+ */
+ private static FastHashMap customConverters = null;
+
+
+ /**
* The Class object for java.lang.String.
*/
private static Class stringClass = String.class;
@@ -284,6 +292,11 @@
return (convertFloat(value, null));
} else if (clazz == Short.class) {
return (convertShort(value, null));
+ } else if ((customConverters != null) &&
+ (customConverters.containsKey(clazz))) {
+ Converter converter = (Converter)
+ customConverters.get(clazz);
+ return (converter.convert(clazz, value));
} else {
if (value == null)
return ((String) null);
@@ -397,6 +410,15 @@
for (int i = 0; i < len; i++)
array[i] = convertShort(values[i], null);
return (array);
+ } else if ((customConverters != null) &&
+ (customConverters.containsKey(type))) {
+ Converter converter = (Converter)
+ customConverters.get(type);
+ Object array = Array.newInstance(type, len);
+ for (int i = 0; i < len; i++) {
+ Array.set(array, i, converter.convert(type, values[i]));
+ }
+ return (array);
} else {
if (values == null)
return ((String[]) null);
@@ -407,6 +429,69 @@
return (array);
}
}
+
+ }
+
+
+ /**
+ * Remove all registered {@link Converter}s.
+ */
+ public static void deregister() {
+
+ if (customConverters != null) {
+ customConverters.clear();
+ }
+
+ }
+
+
+ /**
+ * Remove any registered {@link Converter} for the specified destination
+ * <code>Class</code>.
+ *
+ * @param clazz Class for which to remove a registered Converter
+ */
+ public static void deregister(Class clazz) {
+
+ if (customConverters != null) {
+ customConverters.remove(clazz);
+ }
+
+ }
+
+
+ /**
+ * Look up and return any registered {@link Converter} for the specified
+ * destination class; if there is no registered Converter, return
+ * <code>null</code>.
+ *
+ * @param clazz Class for which to return a registered Converter
+ */
+ public static Converter lookup(Class clazz) {
+
+ if (customConverters != null) {
+ return ((Converter) customConverters.get(clazz));
+ } else {
+ return (null);
+ }
+
+ }
+
+
+ /**
+ * Register a custom {@link Converter} for the specified destination
+ * <code>Class</code>, replacing any previously registered Converter.
+ *
+ * @param converter Converter to be registered
+ * @param clazz Destination class for conversions performed by this
+ * Converter
+ */
+ public static void register(Converter converter, Class clazz) {
+
+ if (customConverters == null) {
+ customConverters = new FastHashMap();
+ }
+ customConverters.put(clazz, converter);
}
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