    001// Copyright 2007, 2008 The Apache Software Foundation
    002//
    003// Licensed under the Apache License, Version 2.0 (the "License");
    004// you may not use this file except in compliance with the License.
    005// You may obtain a copy of the License at
    006//
    007//     http://www.apache.org/licenses/LICENSE-2.0
    008//
    009// Unless required by applicable law or agreed to in writing, software
    010// distributed under the License is distributed on an "AS IS" BASIS,
    011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    012// See the License for the specific language governing permissions and
    013// limitations under the License.
    014
    015package org.apache.tapestry5.internal.services;
    016
    017import org.apache.tapestry5.ComponentResources;
    018import org.apache.tapestry5.Field;
    019import org.apache.tapestry5.FieldValidator;
    020import org.apache.tapestry5.commons.AnnotationProvider;
    021import org.apache.tapestry5.commons.Messages;
    022import org.apache.tapestry5.internal.beaneditor.EnvironmentMessages;
    023import org.apache.tapestry5.services.FieldValidatorDefaultSource;
    024import org.apache.tapestry5.services.FieldValidatorSource;
    025import org.apache.tapestry5.services.ValidationConstraintGenerator;
    026import org.apache.tapestry5.services.Environment;
    027
    028import static org.apache.tapestry5.commons.util.CollectionFactory.newList;
    029
    030import java.util.List;
    031import java.util.Locale;
    032
    033public class FieldValidatorDefaultSourceImpl implements FieldValidatorDefaultSource
    034{
    035    private final ValidationConstraintGenerator validationConstraintGenerator;
    036
    037    private final FieldValidatorSource fieldValidatorSource;
    038
    039    public FieldValidatorDefaultSourceImpl(
    040            ValidationConstraintGenerator validationConstraintGenerator,
    041            FieldValidatorSource fieldValidatorSource)
    042    {
    043        this.validationConstraintGenerator = validationConstraintGenerator;
    044        this.fieldValidatorSource = fieldValidatorSource;
    045    }
    046
    047    public FieldValidator createDefaultValidator(Field field, String overrideId,
    048                                                 Messages overrideMessages, Locale locale, Class propertyType,
    049                                                 AnnotationProvider propertyAnnotations)
    050    {
    051        List<FieldValidator> validators = newList();
    052
    053        for (String constraint : validationConstraintGenerator.buildConstraints(
    054                propertyType,
    055                propertyAnnotations))
    056        {
    057            int equalsx = constraint.indexOf('=');
    058
    059            String validatorType = equalsx > 0 ? constraint.substring(0, equalsx) : constraint;
    060            String constraintValue = equalsx > 0 ? constraint.substring(equalsx + 1) : null;
    061
    062            FieldValidator validator = fieldValidatorSource.createValidator(
    063                    field,
    064                    validatorType,
    065                    constraintValue,
    066                    overrideId,
    067                    overrideMessages,
    068                    locale);
    069
    070            validators.add(validator);
    071        }
    072        return validators.size() == 1 ? validators.get(0) : new CompositeFieldValidator(validators);
    073    }
    074
    075    public FieldValidator createDefaultValidator(ComponentResources resources, String parameterName)
    076    {
    077        Class propertyType = resources.getBoundType(parameterName);
    078
    079        if (propertyType == null) return null;
    080
    081        Field field = (Field) resources.getComponent();
    082
    083        return createDefaultValidator(field, resources.getId(), resources.getContainerMessages(), resources.getLocale(),
    084                                      propertyType, resources.getAnnotationProvider(parameterName));
    085    }
    086}