001// Copyright 2004, 2005 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.tapestry.wml; 016 017import org.apache.tapestry.IMarkupWriter; 018import org.apache.tapestry.IRequestCycle; 019import org.apache.tapestry.form.IPropertySelectionModel; 020 021/** 022 * SelectionField specifies a postfield element and it is used to complement the 023 * {@link PropertySelection}component. 024 * 025 * @author David Solis 026 * @since 3.0 027 */ 028public abstract class SelectionField extends AbstractPostfield 029{ 030 /** 031 * @see org.apache.tapestry.form.AbstractFormComponent#rewindFormComponent(org.apache.tapestry.IMarkupWriter, org.apache.tapestry.IRequestCycle) 032 */ 033 protected void rewindFormComponent(IMarkupWriter writer, IRequestCycle cycle) 034 { 035 String optionValue = cycle.getParameter(getName()); 036 IPropertySelectionModel model = getModel(); 037 Object value = (optionValue == null) ? null : model.translateValue(optionValue); 038 039 updateValue(value); 040 } 041 042 public abstract IPropertySelectionModel getModel(); 043}