%line	%branch
org.apache.commons.jelly.tags.swing.ConstraintTag	0%	0%

1		/*
2		* Copyright 2002-2004 The Apache Software Foundation
3		*
4		* Licensed under the Apache License, Version 2.0 (the "License");
5		* you may not use this file except in compliance with the License.
6		* You may obtain a copy of the License at
7		*
8		* http://www.apache.org/licenses/LICENSE-2.0
9		*
10		* Unless required by applicable law or agreed to in writing, software
11		* distributed under the License is distributed on an "AS IS" BASIS,
12		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13		* See the License for the specific language governing permissions and
14		* limitations under the License.
15		*/
16		package org.apache.commons.jelly.tags.swing;
17
18		import java.lang.reflect.InvocationTargetException;
19
20		import org.apache.commons.beanutils.BeanUtils;
21		import org.apache.commons.jelly.DynaBeanTagSupport;
22		import org.apache.commons.jelly.JellyException;
23		import org.apache.commons.jelly.JellyTagException;
24		import org.apache.commons.jelly.Tag;
25		import org.apache.commons.jelly.XMLOutput;
26		import org.apache.commons.jelly.impl.TagFactory;
27		import org.xml.sax.Attributes;
28
29		/** This class represents a layout-manager constraints as passed in
30		* the second argument of {@link Container#add(Component,Object)}.
31		* <p>
32		* In essence, it looks really like nothing else than a bean-class...
33		* with {@link #getConstraintObject}.
34		* Probably a shorter java-source is do-able.
35		* <p>
36		* TODO: this class should probably be extended with special treatment for dimensios
37		* using the converter package.
38		*/
39		public class ConstraintTag extends DynaBeanTagSupport {
40
41		/* TODO: make a gridbagconstraintTag class which supports an attribute "parent"
42		(or... startWith) which is another gridbagconstraintTag whose gridbagconstraint
43		is cloned then attributes are set
44		This tag should also support the attributes such as fill=BOTH
45		and anchor=NORTHEAST...
46		Wooops... need to define setters ?? let's see if BeanUtils does it on public vars
47		And... have an insets?? A child ?
48		*/
49
50		protected Factory factory;
51	0	protected String var = null;
52	0	protected Object bean = null;
53
54		public static class HereFactory extends BeanFactory implements TagFactory {
55		public HereFactory(Class c) { super(c); }
56		public Tag createTag(String name, Attributes attributes) {
57		return new ConstraintTag ( this );
58		// still scratching my head about "this" usage...
59		}
60		} // class HereFactory
61		public static class ConstantFactory implements TagFactory, Factory {
62		public ConstantFactory(Object c) { this.constant = c;}
63		private Object constant;
64		public Object newInstance() { return constant; }
65		public Tag createTag(String name, Attributes attributes) throws JellyException {
66		return new ConstraintTag ( this );
67		}
68		} // class ConstatnStringFactory
69
70		// we could be able to make factories that create their tags in parametrized
71		// subclasses of the tag depending on the name and attributes
72		// it would useful, for example, to make a cardLayout's <card name="">
73
74
75	0	public ConstraintTag (Factory factory) {
76	0	this.factory = factory;
77	0	}
78
79		protected void createBean ( Factory factory ) throws InstantiationException {
80	0	bean = factory.newInstance();
81	0	}
82
83		// --------------------------------------------- ATTRIBUTES
84
85		public void beforeSetAttributes ( ) throws JellyTagException {
86		try {
87	0	createBean(factory);
88	0	} catch (InstantiationException e) {
89	0	throw new JellyTagException(e.toString());
90	0	}
91	0	}
92
93
94		public void setAttribute ( String name, Object value ) throws JellyTagException {
95		// no real need for DynaBeans or ?
96	0	if ( "var".equals(name) ) {
97	0	var = value.toString();
98		} else {
99
100		try {
101	0	BeanUtils.setProperty( bean, name, value );
102	0	} catch (IllegalAccessException e) {
103	0	throw new JellyTagException(e.toString());
104	0	} catch (InvocationTargetException e) {
105	0	throw new JellyTagException(e.toString());
106	0	}
107
108		}
109	0	}
110		// --------------------------------------------------
111		/** Children invocation... just nothing...
112		*/
113		public void doTag ( XMLOutput output ) throws JellyTagException {
114	0	if ( var != null ) context.setVariable ( class="keyword">var, getBean() );
115	0	invokeBody ( output );
116		// nothing else to do... the getConstraintObject method should have been called.
117	0	}
118
119		// ----------------------------------------------
120		public Object getBean() {
121	0	return bean;
122		}
123
124		/** Returns the attached constraint object.
125		*/
126		public Object getConstraintObject() {
127	0	return getBean();
128		}
129		} // class ConstraintTag

This report is generated by jcoverage, Maven and Maven JCoverage Plugin.