polish

org.springframework.context/src/main/java/org/springframework/ui/format/FormatterRegistry.java

@@ -27,7 +27,7 @@ import org.springframework.core.convert.TypeDescriptor;
 public interface FormatterRegistry {
 
 	/**
-	 * Adds a Formatter to this registry indexed by <T>.
+	 * Adds a Formatter to this registry indexed by &lt;T&gt;.
 	 * Calling getFormatter(&lt;T&gt;.class) returns <code>formatter</code>.
 	 * @param formatter the formatter
 	 * @param <T> the type of object the formatter formats
@@ -35,16 +35,16 @@ public interface FormatterRegistry {
 	<T> void add(Formatter<T> formatter);
 
 	/**
-	 * Adds a Formatter to this registry indexed by objectType.
-	 * Use this add method when objectType differs from &lt;T&gt;.
-	 * Calling getFormatter(objectType) returns a decorator that wraps the targetFormatter.
-	 * On format, the decorator first coerses the instance of objectType to &lt;T&gt;, then delegates to <code>targetFormatter</code> to format the value.
+	 * Adds a Formatter to this registry indexed by type.
+	 * Use this add method when type differs from &lt;T&gt;.
+	 * Calling getFormatter(type) returns a decorator that wraps the targetFormatter.
+	 * On format, the decorator first coerses the instance of tType to &lt;T&gt;, then delegates to <code>targetFormatter</code> to format the value.
 	 * On parse, the decorator first delegates to the formatter to parse a &lt;T&gt;, then coerses the parsed value to objectType.
-	 * @param objectType the object type
+	 * @param type the object type
 	 * @param targetFormatter the target formatter
 	 * @param <T> the type of object the target formatter formats
 	 */
-	<T> void add(Class<?> objectType, Formatter<T> targetFormatter);
+	<T> void add(Class<?> type, Formatter<T> targetFormatter);
 
 	/**
 	 * Adds a AnnotationFormatterFactory that will format values of properties annotated with a specific annotation.
@@ -53,7 +53,7 @@ public interface FormatterRegistry {
 	<A extends Annotation, T> void add(AnnotationFormatterFactory<A, T> factory);
 
 	/**
-	 * Get the Formatter for the type.
+	 * Get the Formatter for the type descriptor.
 	 * @return the Formatter, or <code>null</code> if none is registered
 	 */
 	@SuppressWarnings("unchecked")

org.springframework.context/src/main/java/org/springframework/ui/format/GenericFormatterRegistry.java

@@ -21,8 +21,10 @@ import java.lang.reflect.Type;
 import java.lang.reflect.TypeVariable;
 import java.text.ParseException;
 import java.util.HashMap;
+import java.util.LinkedList;
 import java.util.Locale;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 
 import org.springframework.core.GenericTypeResolver;
@@ -33,9 +35,10 @@ import org.springframework.core.convert.support.DefaultConversionService;
 import org.springframework.util.Assert;
 
 /**
- * A generic implementation of {@link FormatterRegistry} suitable for use in most binding environments.
+ * A generic implementation of {@link FormatterRegistry} suitable for use in most environments.
  * @author Keith Donald
  * @since 3.0
+ * @see #setConversionService(ConversionService)
  * @see #add(Formatter)
  * @see #add(Class, Formatter)
  * @see #add(AnnotationFormatterFactory)
@@ -50,13 +53,37 @@ public class GenericFormatterRegistry implements FormatterRegistry {
 	private ConversionService conversionService = new DefaultConversionService();
 
 	/**
-	 * Sets the type conversion service used to coerse objects to the types required for Formatting purposes.
+	 * Sets the type conversion service that will be used to coerse objects to the types required for formatting.
+	 * Defaults to a {@link DefaultConversionService}.
 	 * @param conversionService the conversion service
 	 * @see #add(Class, Formatter)
 	 */
 	public void setConversionService(ConversionService conversionService) {
 		this.conversionService = conversionService;
 	}
+	
+	/**
+	 * Registers the formatters in the map provided by type.
+	 * JavaBean-friendly alternative to calling {@link #add(Class, Formatter)}.
+	 * @param formatters the formatters map
+	 * @see #add(Class, Formatter)
+	 */
+	public void setFormatters(Map<Class<?>, Formatter<?>> formatters) {
+		for (Map.Entry<Class<?>, Formatter<?>> entry : formatters.entrySet()) {
+			add(entry.getKey(), entry.getValue());
+		}
+	}
+
+	/**
+	 * Registers the annotation formatter factories in the set provided.
+	 * JavaBean-friendly alternative to calling {@link #add(AnnotationFormatterFactory)}.
+	 * @see #add(AnnotationFormatterFactory)
+	 */
+	public void setAnnotationFormatterFactories(Set<AnnotationFormatterFactory> factories) {
+		for (AnnotationFormatterFactory factory : factories) {
+			add(factory);
+		}
+	}
 
 	// implementing FormatterRegistry
 
@@ -64,12 +91,15 @@ public class GenericFormatterRegistry implements FormatterRegistry {
 		typeFormatters.put(getFormattedObjectType(formatter.getClass()), formatter);
 	}
 
-	public <T> void add(Class<?> objectType, Formatter<T> formatter) {
-		if (objectType.isAnnotation()) {
-			annotationFormatters.put(objectType, new SimpleAnnotationFormatterFactory(formatter));
-		} else {
-			typeFormatters.put(objectType, formatter);
+	public <T> void add(Class<?> type, Formatter<T> formatter) {
+		Class<?> formattedObjectType = getFormattedObjectType(formatter.getClass());
+		if (!conversionService.canConvert(formattedObjectType, type)) {
+			throw new IllegalArgumentException("Unable to register formatter " + formatter + " for type [" + type.getName() + "]; not able to convert from [" + formattedObjectType.getName() + "] to parse");
 		}
+		if (!conversionService.canConvert(type, formattedObjectType)) {
+			throw new IllegalArgumentException("Unable to register formatter " + formatter + " for type [" + type.getName() + "]; not able to convert to [" + formattedObjectType.getName() + "] to format");
+		}		
+		typeFormatters.put(type, formatter);
 	}
 
 	public <A extends Annotation, T> void add(AnnotationFormatterFactory<A, T> factory) {
@@ -158,7 +188,7 @@ public class GenericFormatterRegistry implements FormatterRegistry {
 	
 	private Formatter<?> getTypeFormatter(Class<?> type) {
 		Assert.notNull(type, "The Class of the object to format is required");
-		Formatter formatter = typeFormatters.get(type);
+		Formatter formatter = findFormatter(type);
 		if (formatter != null) {
 			Class<?> formattedObjectType = getFormattedObjectType(formatter.getClass());
 			if (type.isAssignableFrom(formattedObjectType)) {
@@ -170,6 +200,26 @@ public class GenericFormatterRegistry implements FormatterRegistry {
 			return getDefaultFormatter(type);
 		}
 	}
+	
+	private Formatter<?> findFormatter(Class<?> type) {
+		LinkedList<Class> classQueue = new LinkedList<Class>();
+		classQueue.addFirst(type);
+		while (!classQueue.isEmpty()) {
+			Class currentClass = classQueue.removeLast();
+			Formatter<?> formatter = typeFormatters.get(currentClass);
+			if (formatter != null) {
+				return formatter;
+			}
+			if (currentClass.getSuperclass() != null) {
+				classQueue.addFirst(currentClass.getSuperclass());
+			}
+			Class[] interfaces = currentClass.getInterfaces();
+			for (Class ifc : interfaces) {
+				classQueue.addFirst(ifc);
+			}
+		}
+		return null;
+	}
 
 	private Formatter<?> getDefaultFormatter(Class<?> type) {
 		Formatted formatted = AnnotationUtils.findAnnotation(type, Formatted.class);
@@ -191,20 +241,6 @@ public class GenericFormatterRegistry implements FormatterRegistry {
 		}
 	}
 
-	private static class SimpleAnnotationFormatterFactory implements AnnotationFormatterFactory {
-
-		private Formatter formatter;
-
-		public SimpleAnnotationFormatterFactory(Formatter formatter) {
-			this.formatter = formatter;
-		}
-
-		public Formatter getFormatter(Annotation annotation) {
-			return formatter;
-		}
-
-	}
-
 	private class ConvertingFormatter implements Formatter {
 
 		private Class<?> type;

org.springframework.context/src/main/java/org/springframework/ui/format/number/CurrencyFormatter.java

@@ -32,6 +32,7 @@ import org.springframework.ui.format.Formatter;
  * Applies {@link RoundingMode#DOWN} to parsed values.
  * @author Keith Donald
  * @since 3.0
+ * @see #setLenient(boolean)
  */
 public final class CurrencyFormatter implements Formatter<BigDecimal> {
 
@@ -39,6 +40,16 @@ public final class CurrencyFormatter implements Formatter<BigDecimal> {
 
 	private boolean lenient;
 
+	/**
+	 * Specify whether or not parsing is to be lenient.
+	 * With lenient parsing, the parser may allow inputs that do not precisely match the format.
+	 * With strict parsing, inputs must match the format exactly.
+	 * Default is false.
+	 */
+	public void setLenient(boolean lenient) {
+		this.lenient = lenient;
+	}
+
 	public String format(BigDecimal decimal, Locale locale) {
 		if (decimal == null) {
 			return "";

org.springframework.context/src/main/java/org/springframework/ui/format/number/DecimalFormatter.java

@@ -16,6 +16,7 @@
 package org.springframework.ui.format.number;
 
 import java.math.BigDecimal;
+import java.text.DecimalFormat;
 import java.text.NumberFormat;
 import java.text.ParseException;
 import java.text.ParsePosition;
@@ -24,14 +25,17 @@ import java.util.Locale;
 import org.springframework.ui.format.Formatter;
 
 /**
- * A BigDecimal formatter for decimal values.
+ * A Number formatter for decimal values.
  * Delegates to {@link NumberFormat#getInstance(Locale)}.
  * Configures BigDecimal parsing so there is no loss in precision.
- * Allows configuration over the decimal number pattern; see {@link #DecimalFormatter(String)}.
+ * Allows configuration over the decimal number pattern.
+ * The {@link #parse(String, Locale)} routine always returns a BigDecimal.
  * @author Keith Donald
  * @since 3.0
+ * @see #setPattern(String)
+ * @see #setLenient(boolean)
  */
-public final class DecimalFormatter implements Formatter<BigDecimal> {
+public final class DecimalFormatter implements Formatter<Number> {
 
 	private DefaultNumberFormatFactory formatFactory = new DefaultNumberFormatFactory();
 
@@ -40,13 +44,28 @@ public final class DecimalFormatter implements Formatter<BigDecimal> {
 	public DecimalFormatter() {
 		initDefaults();
 	}
-	
-	public DecimalFormatter(String pattern) {
-		initDefaults();
+
+	/**
+	 * Sets the pattern to use to format number values.
+	 * If not specified, the default DecimalFormat pattern is used.
+	 * @param pattern the format pattern
+	 * @see DecimalFormat#applyPattern(String)
+	 */
+	public void setPattern(String pattern) {
 		formatFactory.setPattern(pattern);
 	}
-	
-	public String format(BigDecimal decimal, Locale locale) {
+
+	/**
+	 * Specify whether or not parsing is to be lenient.
+	 * With lenient parsing, the parser may allow inputs that do not precisely match the format.
+	 * With strict parsing, inputs must match the format exactly.
+	 * Default is false.
+	 */
+	public void setLenient(boolean lenient) {
+		this.lenient = lenient;
+	}
+
+	public String format(Number decimal, Locale locale) {
 		if (decimal == null) {
 			return "";
 		}
@@ -54,8 +73,7 @@ public final class DecimalFormatter implements Formatter<BigDecimal> {
 		return format.format(decimal);
 	}
 
-	public BigDecimal parse(String formatted, Locale locale)
-			throws ParseException {
+	public Number parse(String formatted, Locale locale) throws ParseException {
 		if (formatted.length() == 0) {
 			return null;
 		}
@@ -73,7 +91,9 @@ public final class DecimalFormatter implements Formatter<BigDecimal> {
 		}
 		return decimal;
 	}
-	
+
+	// internal helpers
+
 	private void initDefaults() {
 		formatFactory.setParseBigDecimal(true);
 	}

org.springframework.context/src/main/java/org/springframework/ui/format/number/IntegerFormatter.java

@@ -23,18 +23,30 @@ import java.util.Locale;
 import org.springframework.ui.format.Formatter;
 
 /**
- * A Long formatter for whole integer values.
+ * A Number formatter for whole integer values.
  * Delegates to {@link NumberFormat#getIntegerInstance(Locale)}.
+ * The {@link #parse(String, Locale)} routine always returns a Long.
  * @author Keith Donald
  * @since 3.0
+ * @see #setLenient(boolean)
  */
-public final class IntegerFormatter implements Formatter<Long> {
+public final class IntegerFormatter implements Formatter<Number> {
 
 	private IntegerNumberFormatFactory formatFactory = new IntegerNumberFormatFactory();
 
 	private boolean lenient;
 
-	public String format(Long integer, Locale locale) {
+	/**
+	 * Specify whether or not parsing is to be lenient.
+	 * With lenient parsing, the parser may allow inputs that do not precisely match the format.
+	 * With strict parsing, inputs must match the format exactly.
+	 * Default is false.
+	 */
+	public void setLenient(boolean lenient) {
+		this.lenient = lenient;
+	}
+
+	public String format(Number integer, Locale locale) {
 		if (integer == null) {
 			return "";
 		}
@@ -42,7 +54,7 @@ public final class IntegerFormatter implements Formatter<Long> {
 		return format.format(integer);
 	}
 
-	public Long parse(String formatted, Locale locale)
+	public Number parse(String formatted, Locale locale)
 			throws ParseException {
 		if (formatted.length() == 0) {
 			return null;

org.springframework.context/src/main/java/org/springframework/ui/format/number/PercentFormatter.java

@@ -24,27 +24,39 @@ import java.util.Locale;
 import org.springframework.ui.format.Formatter;
 
 /**
- * A BigDecimal formatter for percent values.
+ * A Number formatter for percent values.
  * Delegates to {@link NumberFormat#getPercentInstance(Locale)}.
  * Configures BigDecimal parsing so there is no loss in precision.
+ * The {@link #parse(String, Locale)} routine always returns a BigDecimal.
  * @author Keith Donald
  * @since 3.0
+ * @see #setLenient(boolean)
  */
-public final class PercentFormatter implements Formatter<BigDecimal> {
+public final class PercentFormatter implements Formatter<Number> {
 
 	private PercentNumberFormatFactory percentFormatFactory = new PercentNumberFormatFactory();
 
 	private boolean lenient;
 
-	public String format(BigDecimal decimal, Locale locale) {
-		if (decimal == null) {
+	/**
+	 * Specify whether or not parsing is to be lenient.
+	 * With lenient parsing, the parser may allow inputs that do not precisely match the format.
+	 * With strict parsing, inputs must match the format exactly.
+	 * Default is false.
+	 */
+	public void setLenient(boolean lenient) {
+		this.lenient = lenient;
+	}
+
+	public String format(Number number, Locale locale) {
+		if (number == null) {
 			return "";
 		}
 		NumberFormat format = percentFormatFactory.getNumberFormat(locale);
-		return format.format(decimal);
+		return format.format(number);
 	}
 
-	public BigDecimal parse(String formatted, Locale locale)
+	public Number parse(String formatted, Locale locale)
 			throws ParseException {
 		if (formatted.length() == 0) {
 			return null;

org.springframework.context/src/test/java/org/springframework/ui/format/GenericFormatterRegistryTests.java

@@ -4,6 +4,7 @@ import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNull;
 
 import java.math.BigDecimal;
+import java.math.BigInteger;
 import java.text.ParseException;
 import java.util.Locale;
 
@@ -25,18 +26,20 @@ public class GenericFormatterRegistryTests {
 	}
 
 	@Test
-	public void testAdd() {
+	public void testAdd() throws ParseException {
 		registry.add(new IntegerFormatter());
-		Formatter formatter = registry.getFormatter(typeDescriptor(Long.class));
-		String formatted = formatter.format(new Long(3), Locale.US);
+		Formatter formatter = registry.getFormatter(typeDescriptor(Integer.class));
+		String formatted = formatter.format(new Integer(3), Locale.US);
 		assertEquals("3", formatted);
+		Integer i = (Integer) formatter.parse("3", Locale.US);
+		assertEquals(new Integer(3), i);
 	}
 
 	@Test
 	public void testAddByObjectType() {
-		registry.add(Integer.class, new IntegerFormatter());
-		Formatter formatter = registry.getFormatter(typeDescriptor(Integer.class));
-		String formatted = formatter.format(new Integer(3), Locale.US);
+		registry.add(BigInteger.class, new IntegerFormatter());
+		Formatter formatter = registry.getFormatter(typeDescriptor(BigInteger.class));
+		String formatted = formatter.format(new BigInteger("3"), Locale.US);
 		assertEquals("3", formatted);
 	}
 
@@ -64,6 +67,11 @@ public class GenericFormatterRegistryTests {
 	public void testGetNoFormatterForType() {
 		assertNull(registry.getFormatter(typeDescriptor(Integer.class)));
 	}
+
+	@Test(expected=IllegalArgumentException.class)
+	public void testGetFormatterCannotConvert() {
+		registry.add(Integer.class, new AddressFormatter());
+	}
 	
 	@CurrencyFormat
 	public BigDecimal currencyField;
@@ -74,8 +82,11 @@ public class GenericFormatterRegistryTests {
 
 	public static class CurrencyAnnotationFormatterFactory implements
 			AnnotationFormatterFactory<CurrencyFormat, BigDecimal> {
+		
+		private CurrencyFormatter currencyFormatter = new CurrencyFormatter();
+		
 		public Formatter<BigDecimal> getFormatter(CurrencyFormat annotation) {
-			return new CurrencyFormatter();
+			return currencyFormatter;
 		}
 	}