    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.internal.beaneditor.EnvironmentMessages;
    021import org.apache.tapestry5.ioc.AnnotationProvider;
    022import org.apache.tapestry5.ioc.Messages;
    023import static org.apache.tapestry5.ioc.internal.util.CollectionFactory.newList;
    024import org.apache.tapestry5.services.FieldValidatorDefaultSource;
    025import org.apache.tapestry5.services.FieldValidatorSource;
    026import org.apache.tapestry5.services.ValidationConstraintGenerator;
    027import org.apache.tapestry5.services.Environment;
    028
    029import java.util.List;
    030import java.util.Locale;
    031
    032public class FieldValidatorDefaultSourceImpl implements FieldValidatorDefaultSource
    033{
    034    private final ValidationConstraintGenerator validationConstraintGenerator;
    035
    036    private final FieldValidatorSource fieldValidatorSource;
    037
    038    public FieldValidatorDefaultSourceImpl(
    039            ValidationConstraintGenerator validationConstraintGenerator,
    040            FieldValidatorSource fieldValidatorSource)
    041    {
    042        this.validationConstraintGenerator = validationConstraintGenerator;
    043        this.fieldValidatorSource = fieldValidatorSource;
    044    }
    045
    046    public FieldValidator createDefaultValidator(Field field, String overrideId,
    047                                                 Messages overrideMessages, Locale locale, Class propertyType,
    048                                                 AnnotationProvider propertyAnnotations)
    049    {
    050        List<FieldValidator> validators = newList();
    051
    052        for (String constraint : validationConstraintGenerator.buildConstraints(
    053                propertyType,
    054                propertyAnnotations))
    055        {
    056            int equalsx = constraint.indexOf('=');
    057
    058            String validatorType = equalsx > 0 ? constraint.substring(0, equalsx) : constraint;
    059            String constraintValue = equalsx > 0 ? constraint.substring(equalsx + 1) : null;
    060
    061            FieldValidator validator = fieldValidatorSource.createValidator(
    062                    field,
    063                    validatorType,
    064                    constraintValue,
    065                    overrideId,
    066                    overrideMessages,
    067                    locale);
    068
    069            validators.add(validator);
    070        }
    071        return validators.size() == 1 ? validators.get(0) : new CompositeFieldValidator(validators);
    072    }
    073
    074    public FieldValidator createDefaultValidator(ComponentResources resources, String parameterName)
    075    {
    076        Class propertyType = resources.getBoundType(parameterName);
    077
    078        if (propertyType == null) return null;
    079
    080        Field field = (Field) resources.getComponent();
    081
    082        return createDefaultValidator(field, resources.getId(), resources.getContainerMessages(), resources.getLocale(),
    083                                      propertyType, resources.getAnnotationProvider(parameterName));
    084    }
    085}