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}