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 net.sf.beanform.prop.BeanProperty;
018    
019    import org.apache.hivemind.ApplicationRuntimeException;
020    import org.apache.tapestry.IRequestCycle;
021    import org.apache.tapestry.components.Block;
022    import org.apache.tapestry.form.IFormComponent;
023    
024    /**
025     * Superclass for low level BeanForm components which must be wrapped by
026     * a {@link BeanFormRows} component.
027     *
028     * @see BeanFormLabel
029     * @see BeanFormField
030     *
031     * @author Daniel Gredler
032     */
033    public abstract class BeanFormRowComponent extends BeanFormComponent {
034    
035        public Object getBean() {
036            return this.getBeanFormRows().getBeanForm().getBeanSafely();
037        }
038    
039        public BeanProperty getProperty() {
040            return this.getBeanFormRows().getProperty();
041        }
042    
043        public String getDisplayName() {
044            String name = this.getProperty().getName();
045            return this.getPage().getMessages().getMessage( name );
046        }
047    
048        protected void addExtraBindings( IFormComponent field ) {
049            this.getBeanFormRows().addExtraBindings( field );
050        }
051    
052        private BeanFormRows getBeanFormRows() {
053            IRequestCycle cycle = this.getPage().getRequestCycle();
054            BeanFormRows rows = (BeanFormRows) cycle.getAttribute( BeanFormRows.BEAN_FORM_ROWS_ATTRIBUTE );
055            if( rows == null ) throw new ApplicationRuntimeException( BeanFormMessages.noBeanFormRows( this ) );
056            return rows;
057        }
058    
059        public Block getCustomFieldBlock() {
060            return this.getCustomFieldBlock( this.getProperty() );
061        }
062    
063        public IFormComponent getCustomField() {
064            return this.getCustomField( this.getProperty() );
065        }
066    
067    }