    001    // Copyright 2008, 2010 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
    015    package org.apache.tapestry5.internal.services;
    016
    017    import java.util.Map;
    018
    019    import org.apache.tapestry5.dom.Element;
    020    import org.apache.tapestry5.services.HiddenFieldLocationRules;
    021    import org.apache.tapestry5.services.RelativeElementPosition;
    022
    023    public class HiddenFieldLocationRulesImpl implements HiddenFieldLocationRules
    024    {
    025        private final Map<String, RelativeElementPosition> configuration;
    026
    027        public HiddenFieldLocationRulesImpl(Map<String, RelativeElementPosition> configuration)
    028        {
    029            this.configuration = configuration;
    030        }
    031
    032        private boolean match(Element element, RelativeElementPosition position)
    033        {
    034            assert element != null;
    035            String key = element.getName();
    036
    037            RelativeElementPosition actual = configuration.get(key);
    038
    039            if (actual == null)
    040                return false;
    041
    042            return actual == position;
    043        }
    044
    045        public boolean placeHiddenFieldInside(Element element)
    046        {
    047            return match(element, RelativeElementPosition.INSIDE);
    048        }
    049
    050        public boolean placeHiddenFieldAfter(Element element)
    051        {
    052            return match(element, RelativeElementPosition.AFTER);
    053        }
    054    }