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    
015    package org.apache.tapestry.valid;
016    
017    import java.io.Serializable;
018    
019    import org.apache.hivemind.util.Defense;
020    import org.apache.tapestry.IRender;
021    import org.apache.tapestry.form.IFormComponent;
022    
023    /**
024     * Default implementation of {@link IFieldTracking}.
025     * 
026     * @author Howard Lewis Ship
027     * @since 1.0.8
028     */
029    
030    public class FieldTracking implements IFieldTracking, Serializable
031    {
032        private static final long serialVersionUID = -5397563163968532716L;
033    
034        private transient IFormComponent _component;
035    
036        private String _input;
037    
038        private IRender _renderer;
039    
040        private String _fieldName;
041    
042        private ValidationConstraint _constraint;
043    
044        /**
045         * Constructor used for unassociated errors; errors that are not about any particular field
046         * within the form.
047         */
048    
049        FieldTracking()
050        {
051        }
052    
053        /**
054         * Standard constructor for a field (with the given name), rendered by the specified component.
055         */
056    
057        FieldTracking(String fieldName, IFormComponent component)
058        {
059            Defense.notNull(fieldName, "fieldName");
060            Defense.notNull(component, "component");
061    
062            _fieldName = fieldName;
063            _component = component;
064        }
065    
066        public IFormComponent getComponent()
067        {
068            return _component;
069        }
070    
071        public IRender getErrorRenderer()
072        {
073            return _renderer;
074        }
075    
076        public void setErrorRenderer(IRender value)
077        {
078            _renderer = value;
079        }
080    
081        public String getInput()
082        {
083            return _input;
084        }
085    
086        public void setInput(String value)
087        {
088            _input = value;
089        }
090    
091        public String getFieldName()
092        {
093            return _fieldName;
094        }
095    
096        public ValidationConstraint getConstraint()
097        {
098            return _constraint;
099        }
100    
101        public void setConstraint(ValidationConstraint constraint)
102        {
103            _constraint = constraint;
104        }
105    
106        /** @since 3.0 * */
107    
108        public boolean isInError()
109        {
110            return _renderer != null;
111        }
112    
113    }