/* Copyright 2009 Ben Gunter
*
* 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 net.sourceforge.stripes.examples.bugzooky.ext;
import java.util.Collection;
import java.util.Locale;
import net.sourceforge.stripes.examples.bugzooky.biz.Bug;
import net.sourceforge.stripes.examples.bugzooky.biz.BugManager;
import net.sourceforge.stripes.validation.SimpleError;
import net.sourceforge.stripes.validation.TypeConverter;
import net.sourceforge.stripes.validation.ValidationError;
/**
* A {@link TypeConverter} that parses its input string to an integer and queries the
* {@link BugManager} for a {@link Bug} object with that ID. If no {@link Bug} with the ID is found,
* then it simply returns null. If the input string cannot be parsed as an integer, then this
* {@link TypeConverter} adds a validation error and returns null.
*
* @author Ben Gunter
*/
public class BugTypeConverter implements TypeConverter<Bug> {
/**
* Attempt to parse the input string to an integer and look up the {@link Bug} with that ID
* using a {@link BugManager}.
*
* @param input The input string to be parsed as the Bug ID.
* @param targetType The type of object we're supposed to be returning.
* @param errors The validation errors for this request. If the input string cannot be parsed,
* then we will add a new {@link ValidationError} to this collection and return null.
*/
public Bug convert(String input, Class<? extends Bug> targetType,
Collection<ValidationError> errors) {
Bug bug = null;
try {
int id = Integer.valueOf(input);
BugManager bugManager = new BugManager();
bug = bugManager.getBug(id);
}
catch (NumberFormatException e) {
errors.add(new SimpleError("The number {0} is not a valid Bug ID", input));
}
return bug;
}
/** This is specified in the {@link TypeConverter} interface, but it is not used here. */
public void setLocale(Locale locale) {
}
}