org.apache.tapestry5.internal.beaneditor.MessagesConstraintGenerator Maven / Gradle / Ivy
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Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2007 The Apache Software Foundation
//
// 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.apache.tapestry5.internal.beaneditor;
import org.apache.tapestry5.services.ValidationConstraintGenerator;
import org.apache.tapestry5.services.Environment;
import org.apache.tapestry5.services.PropertyEditContext;
import org.apache.tapestry5.ioc.AnnotationProvider;
import org.apache.tapestry5.ioc.Messages;
import org.apache.tapestry5.ioc.internal.util.InternalUtils;
import java.util.List;
import java.util.Arrays;
import java.util.regex.Pattern;
/**
* Generates constraints from the containing component's property file.
* Looks for a key in the form: propertyId-validate.
*
*/
public class MessagesConstraintGenerator implements ValidationConstraintGenerator
{
private final Environment environment;
private final String format="%s-validate";
private final Pattern splitPattern;
public MessagesConstraintGenerator(final Environment environment) {
this.environment = environment;
splitPattern = Pattern.compile(ValidateAnnotationConstraintGenerator.VALIDATOR_PATTERN);
}
public List buildConstraints(Class propertyType, AnnotationProvider annotationProvider)
{
EnvironmentMessages environmentMessages = environment.peek(EnvironmentMessages.class);
if (environmentMessages == null) {
return null;
}
String key = String.format(format,environmentMessages.getOverrideId());
Messages m = environmentMessages.getMessages();
if (!m.contains(key))
{
return null;
}
String result = m.get(key);
if (InternalUtils.isBlank(result))
{
return null;
}
return Arrays.asList(splitPattern.split(result));
}
}