formatter polishing

spring-binding/src/main/java/org/springframework/binding/convert/converters/FormatterConverter.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2004-2008 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.binding.convert.converters;
+
+import org.springframework.binding.convert.Converter;
+import org.springframework.binding.format.Formatter;
+
+/**
+ * Adapts a Formatter to the Converter interface. Allows a Formatter to be used as a Converter. Allows for both the
+ * to-string and from-string logic to be used.
+ * 
+ * @see Formatter
+ * @see Formatter#format(Object)
+ * @see Formatter#parse(String)
+ * 
+ * @author Keith Donald
+ */
+public class FormatterConverter implements Converter {
+
+	private Formatter formatter;
+
+	/**
+	 * Creates a new formatter converter.
+	 * @param formatter the formatter instance to adapt to the Converter API
+	 */
+	public FormatterConverter(Formatter formatter) {
+		this.formatter = formatter;
+	}
+
+	public Class[] getSourceClasses() {
+		return new Class[] { formatter.getObjectType(), String.class };
+	}
+
+	public Class[] getTargetClasses() {
+		return new Class[] { String.class, formatter.getObjectType() };
+	}
+
+	public Object convert(Object source, Class targetClass, Object context) throws Exception {
+		if (targetClass.equals(String.class)) {
+			return formatter.format(source);
+		} else {
+			return formatter.parse((String) source);
+		}
+	}
+
+}

spring-binding/src/main/java/org/springframework/binding/format/formatters/IntegerFormatter.java

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+/*
+ * Copyright 2004-2008 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.binding.format.formatters;
+
+import java.text.NumberFormat;
+import java.util.Locale;
+
+/**
+ * The default formatter for integer instances that are whole numbers and do not have fractions, such as Integers,
+ * Longs, and Shorts. Simply delegates to {@link NumberFormat#getIntegerInstance(Locale)}.
+ * 
+ * @author Keith Donald
+ */
+public class IntegerFormatter extends NumberFormatter {
+
+	public IntegerFormatter(Class numberClass) {
+		super(numberClass);
+	}
+
+	protected NumberFormat createNumberFormat(Locale locale) {
+		return NumberFormat.getIntegerInstance(locale);
+	}
+}