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| org.apache.commons.jelly.tags.core.SetPropertiesTag |
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| 1 | /* |
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| 2 | * Copyright 2002,2004 The Apache Software Foundation. |
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| 3 | * |
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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| 5 | * you may not use this file except in compliance with the License. |
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| 6 | * You may obtain a copy of the License at |
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| 7 | * |
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 9 | * |
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| 10 | * Unless required by applicable law or agreed to in writing, software |
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 13 | * See the License for the specific language governing permissions and |
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| 14 | * limitations under the License. |
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| 15 | */ |
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| 16 | package org.apache.commons.jelly.tags.core; |
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| 17 | ||
| 18 | import java.lang.reflect.InvocationTargetException; |
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| 19 | import java.util.Map; |
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| 20 | ||
| 21 | import org.apache.commons.beanutils.BeanUtils; |
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| 22 | ||
| 23 | import org.apache.commons.jelly.JellyException; |
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| 24 | import org.apache.commons.jelly.JellyTagException; |
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| 25 | import org.apache.commons.jelly.MissingAttributeException; |
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| 26 | import org.apache.commons.jelly.MapTagSupport; |
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| 27 | import org.apache.commons.jelly.XMLOutput; |
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| 28 | import org.apache.commons.jelly.impl.BeanSource; |
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| 29 | ||
| 30 | /** |
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| 31 | * A tag which sets the bean properties on the given bean. |
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| 32 | * So if you used it as follows, for example using the <j:new> tag. |
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| 33 | * <pre> |
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| 34 | * <j:new className="com.acme.Person" var="person"/> |
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| 35 | * <j:setProperties object="${person}" name="James" location="${loc}"/> |
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| 36 | * </pre> |
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| 37 | * Then it would set the name and location properties on the bean denoted by |
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| 38 | * the expression ${person}. |
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| 39 | * <p> |
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| 40 | * This tag can also be nested inside a bean tag such as the <useBean> tag |
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| 41 | * or a JellySwing tag to set one or more properties, maybe inside some conditional |
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| 42 | * logic. |
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| 43 | * |
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| 44 | * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
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| 45 | * @version $Revision: 155420 $ |
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| 46 | */ |
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| 47 | public class SetPropertiesTag extends MapTagSupport { |
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| 48 | ||
| 49 | 26 | public SetPropertiesTag(){ |
| 50 | 26 | } |
| 51 | ||
| 52 | // Tag interface |
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| 53 | //------------------------------------------------------------------------- |
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| 54 | public void doTag(XMLOutput output) throws MissingAttributeException, JellyTagException { |
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| 55 | 26 | Map attributes = getAttributes(); |
| 56 | 26 | Object bean = attributes.remove( "object" ); |
| 57 | 26 | if ( bean == null ) { |
| 58 | // lets try find a parent bean |
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| 59 | 26 | BeanSource tag = (BeanSource) findAncestorWithClass(BeanSource.class); |
| 60 | 13 | if (tag != null) { |
| 61 | try { |
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| 62 | 13 | bean = tag.getBean(); |
| 63 | 0 | } catch (JellyException e) { |
| 64 | 0 | throw new JellyTagException(e); |
| 65 | 13 | } |
| 66 | } |
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| 67 | 13 | if (bean == null) { |
| 68 | 0 | throw new MissingAttributeException("bean"); |
| 69 | } |
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| 70 | } |
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| 71 | 26 | setBeanProperties(bean, attributes); |
| 72 | 26 | } |
| 73 | ||
| 74 | // Implementation methods |
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| 75 | //------------------------------------------------------------------------- |
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| 76 | ||
| 77 | /** |
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| 78 | * Sets the properties on the bean. Derived tags could implement some custom |
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| 79 | * type conversion etc. |
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| 80 | */ |
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| 81 | protected void setBeanProperties(Object bean, Map attributes) throws JellyTagException { |
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| 82 | try { |
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| 83 | 26 | BeanUtils.populate(bean, attributes); |
| 84 | 0 | } catch (IllegalAccessException e) { |
| 85 | 0 | throw new JellyTagException("could not set the properties on a bean",e); |
| 86 | 0 | } catch (InvocationTargetException e) { |
| 87 | 0 | throw new JellyTagException("could not set the properties on a bean",e); |
| 88 | 26 | } |
| 89 | 26 | } |
| 90 | } |
| This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |