org.springframework.beans.propertyeditors.CustomDateEditor Maven / Gradle / Ivy
/*
* Copyright 2002-2005 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.beans.propertyeditors;
import java.beans.PropertyEditorSupport;
import java.text.DateFormat;
import java.text.ParseException;
import java.util.Date;
import org.springframework.util.StringUtils;
/**
* PropertyEditor for java.util.Date, supporting a custom DateFormat.
*
* This is not meant to be used as system PropertyEditor but rather as
* locale-specific date editor within custom controller code, to parse
* user-entered date strings into Date properties of beans, and render
* them in the UI form.
*
*
In web MVC code, this editor will typically be registered with
* binder.registerCustomEditor calls in an implementation
* of BaseCommandController's initBinder method.
*
* @author Juergen Hoeller
* @since 28.04.2003
* @see org.springframework.validation.DataBinder#registerCustomEditor
* @see org.springframework.web.servlet.mvc.BaseCommandController#initBinder
* @see org.springframework.web.bind.BindInitializer#initBinder
*/
public class CustomDateEditor extends PropertyEditorSupport {
private final DateFormat dateFormat;
private final boolean allowEmpty;
/**
* Create a new CustomDateEditor instance, using the given DateFormat
* for parsing and rendering.
*
The "allowEmpty" parameter states if an empty String should
* be allowed for parsing, i.e. get interpreted as null value.
* Otherwise, an IllegalArgumentException gets thrown in that case.
* @param dateFormat DateFormat to use for parsing and rendering
* @param allowEmpty if empty strings should be allowed
*/
public CustomDateEditor(DateFormat dateFormat, boolean allowEmpty) {
this.dateFormat = dateFormat;
this.allowEmpty = allowEmpty;
}
/**
* Parse the Date from the given text, using the specified DateFormat.
*/
public void setAsText(String text) throws IllegalArgumentException {
if (this.allowEmpty && !StringUtils.hasText(text)) {
// treat empty String as null value
setValue(null);
}
else {
try {
setValue(this.dateFormat.parse(text));
}
catch (ParseException ex) {
throw new IllegalArgumentException("Could not parse date: " + ex.getMessage());
}
}
}
/**
* Format the Date as String, using the specified DateFormat.
*/
public String getAsText() {
return (getValue() == null ? "" : this.dateFormat.format((Date) getValue()));
}
}