001    // Copyright 2006-2007 Daniel Gredler
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 net.sf.beanform;
016    
017    import java.util.List;
018    import java.util.Map;
019    
020    import net.sf.beanform.binding.DualBinding;
021    import net.sf.beanform.prop.BeanProperty;
022    
023    import org.apache.tapestry.IBinding;
024    import org.apache.tapestry.IMarkupWriter;
025    import org.apache.tapestry.IRequestCycle;
026    import org.apache.tapestry.form.IFormComponent;
027    
028    /**
029     * A low level BeanForm component that generates the rows for all the properties.
030     * This component must be wrapped by a {@link BeanForm} component.
031     *
032     * @author Daniel Gredler
033     */
034    public abstract class BeanFormRows extends BeanFormComponent {
035    
036        public final static String BEAN_FORM_ROWS_ATTRIBUTE = BeanFormRows.class.getName();
037    
038        private BeanProperty property;
039        private Map<String, IBinding> fieldBindings;
040    
041        public BeanProperty getProperty() {
042            return this.property;
043        }
044    
045        public void setProperty( BeanProperty property ) {
046            this.property = property;
047            this.fieldBindings = this.getBeanForm().getFieldBindingsFor( property );
048        }
049    
050        public List<BeanProperty> getProperties() {
051            return this.getBeanForm().getBeanProperties();
052        }
053    
054        @Override
055        protected void renderComponent( IMarkupWriter writer, IRequestCycle cycle ) {
056            Object old = cycle.getAttribute( BEAN_FORM_ROWS_ATTRIBUTE );
057            cycle.setAttribute( BEAN_FORM_ROWS_ATTRIBUTE, this );
058            super.renderComponent( writer, cycle );
059            cycle.setAttribute( BEAN_FORM_ROWS_ATTRIBUTE, old );
060        }
061    
062        protected void addExtraBindings( IFormComponent field ) {
063            DualBinding.addCustomBindings( field, this.fieldBindings, true );
064        }
065    
066    }