    001//  Copyright 2008, 2011 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.services;
    016
    017import org.apache.tapestry5.ComponentResources;
    018import org.apache.tapestry5.Field;
    019import org.apache.tapestry5.FieldTranslator;
    020import org.apache.tapestry5.Translator;
    021import org.apache.tapestry5.commons.AnnotationProvider;
    022import org.apache.tapestry5.commons.Messages;
    023
    024import java.util.Locale;
    025
    026/**
    027 * For a particular field, generates the default {@link org.apache.tapestry5.FieldTranslator} for the field.
    028 */
    029public interface FieldTranslatorSource
    030{
    031    /**
    032     * Common shorthand for {@link #createDefaultTranslator(org.apache.tapestry5.Field, String,
    033     * org.apache.tapestry5.commons.Messages, java.util.Locale, Class, org.apache.tapestry5.commons.AnnotationProvider)}.
    034     *
    035     * @param resources     of component who owns the parameter
    036     * @param parameterName name of parameter used to determine the property type
    037     * @return field translator, or null
    038     */
    039    FieldTranslator createDefaultTranslator(ComponentResources resources, String parameterName);
    040
    041    /**
    042     * Creates a {@link org.apache.tapestry5.FieldTranslator} for the given property, or returns null if one can't be
    043     * constructed. The return value is null if the property type is not known, or if there is no {@link
    044     * org.apache.tapestry5.Translator} available from the {@link org.apache.tapestry5.services.TranslatorSource} that
    045     * is appropriate for the property type.
    046     *
    047     * @param field               for which a translator is needed
    048     * @param overrideId          id used when looking in the overrideMessages for a message override
    049     * @param overrideMessages    location to look for overriding messages
    050     * @param locale              no longer used in 5.3, may be null
    051     * @param propertyType        type of property editted by the field, used to select the Translator
    052     * @param propertyAnnotations annotations on the property (not currently used)
    053     * @return the field translator, or null
    054     */
    055    FieldTranslator createDefaultTranslator(Field field, String overrideId, Messages overrideMessages, Locale locale,
    056                                            Class propertyType, AnnotationProvider propertyAnnotations);
    057
    058    /**
    059     * Wraps a {@link org.apache.tapestry5.Translator} as a FieldTranslator.
    060     * @param locale no longer used in 5.3, may be null
    061     */
    062    FieldTranslator createTranslator(Field field, String overrideId, Messages overrideMessages, Locale locale,
    063                                     Translator translator);
    064
    065    /**
    066     * Creates a translator (used by the {@link org.apache.tapestry5.BindingConstants#TRANSLATE translate: binding
    067     * prefix}).
    068     */
    069    FieldTranslator createTranslator(ComponentResources componentResources, String translatorName);
    070}