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package org.apache.tapestry.annotations; |
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import java.beans.BeanInfo; |
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import java.beans.Introspector; |
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import java.beans.PropertyDescriptor; |
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import java.lang.annotation.Annotation; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.ParameterizedType; |
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import java.lang.reflect.Type; |
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import java.lang.reflect.TypeVariable; |
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import java.util.List; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.tapestry.enhance.EnhanceUtils; |
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import org.apache.tapestry.enhance.EnhancementOperation; |
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import org.apache.tapestry.enhance.EnhancementWorker; |
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import org.apache.tapestry.spec.IComponentSpecification; |
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import org.apache.tapestry.spec.IPropertySpecification; |
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39 | 0 | public class ComponentPropertyProxyWorker implements EnhancementWorker { |
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private List<String> _excludedPackages; |
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public void performEnhancement(EnhancementOperation op, IComponentSpecification spec) { |
47 | 0 | for (Object o : spec.getPropertySpecificationNames()) { |
48 | 0 | String name = (String) o; |
49 | 0 | IPropertySpecification ps = spec.getPropertySpecification(name); |
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51 | 0 | checkProxy(op, ps); |
52 | 0 | } |
53 | 0 | } |
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public Class extractPropertyType(Class type, String propertyName, IPropertySpecification ps) { |
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try { |
58 | 0 | BeanInfo info = Introspector.getBeanInfo(type); |
59 | 0 | PropertyDescriptor[] props = info.getPropertyDescriptors(); |
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61 | 0 | for (PropertyDescriptor prop : props) { |
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63 | 0 | if (!propertyName.equals(prop.getName())) { |
64 | 0 | continue; |
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} |
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67 | 0 | Method m = prop.getReadMethod(); |
68 | 0 | if (m != null && !m.getGenericReturnType().getClass().getName().equals("java.lang.Class") |
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&& TypeVariable.class.isAssignableFrom(m.getGenericReturnType().getClass())) { |
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71 | 0 | ps.setGeneric(true); |
72 | 0 | TypeVariable tvar = (TypeVariable)m.getGenericReturnType(); |
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|
75 | 0 | if (type.getGenericSuperclass() != null |
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&& ParameterizedType.class.isInstance(type.getGenericSuperclass())) { |
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78 | 0 | ParameterizedType ptype = (ParameterizedType)type.getGenericSuperclass(); |
79 | 0 | if (ptype.getActualTypeArguments().length > 0) { |
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81 | 0 | ps.setCanProxy(canProxyType((Class)ptype.getActualTypeArguments()[0])); |
82 | 0 | ps.setType(((Class)tvar.getBounds()[0]).getName()); |
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84 | 0 | return (Class)tvar.getBounds()[0]; |
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} |
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} |
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88 | 0 | return null; |
89 | 0 | } else if (m != null) { |
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|
91 | 0 | ps.setCanProxy(canProxyType(m.getReturnType())); |
92 | 0 | ps.setType(m.getReturnType().getName()); |
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94 | 0 | return m.getReturnType(); |
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} |
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99 | 0 | if (m == null && prop.getWriteMethod() == null) |
100 | 0 | return null; |
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102 | 0 | m = prop.getWriteMethod(); |
103 | 0 | if (m.getParameterTypes().length != 1) |
104 | 0 | return null; |
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106 | 0 | Type genParam = m.getGenericParameterTypes()[0]; |
107 | 0 | Class param = m.getParameterTypes()[0]; |
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109 | 0 | if (!genParam.getClass().getName().equals("java.lang.Class") |
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&& TypeVariable.class.isAssignableFrom(genParam.getClass())) { |
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112 | 0 | TypeVariable tvar = (TypeVariable)genParam; |
113 | 0 | ps.setGeneric(true); |
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|
115 | 0 | if (type.getGenericSuperclass() != null) { |
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117 | 0 | ParameterizedType ptype = (ParameterizedType)type.getGenericSuperclass(); |
118 | 0 | if (ptype.getActualTypeArguments().length > 0) { |
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120 | 0 | ps.setCanProxy(canProxyType((Class)ptype.getActualTypeArguments()[0])); |
121 | 0 | ps.setType(((Class)tvar.getBounds()[0]).getName()); |
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123 | 0 | return (Class)tvar.getBounds()[0]; |
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} |
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} |
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} |
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128 | 0 | ps.setCanProxy(canProxyType(param)); |
129 | 0 | ps.setType(param.getName()); |
130 | 0 | return param; |
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} |
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133 | 0 | } catch (Throwable t) { |
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135 | 0 | throw new ApplicationRuntimeException("Error reading property " + propertyName + " from base component class : " + type, t); |
136 | 0 | } |
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138 | 0 | return null; |
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} |
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boolean canProxyType(Class type) |
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{ |
143 | 0 | if (type == null) |
144 | 0 | return false; |
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|
146 | 0 | if (!EnhanceUtils.canProxyPropertyType(type)) |
147 | 0 | return false; |
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|
149 | 0 | for (Annotation an : type.getAnnotations()) { |
150 | 0 | if (isExcluded(an)) { |
151 | 0 | return false; |
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} |
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} |
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|
155 | 0 | return true; |
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} |
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void checkProxy(EnhancementOperation op, IPropertySpecification ps) { |
159 | 0 | ps.setProxyChecked(true); |
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161 | 0 | if (!ps.isPersistent()) { |
162 | 0 | return; |
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} |
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165 | 0 | extractPropertyType(op.getBaseClass(), ps.getName(), ps); |
166 | 0 | } |
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boolean isExcluded(Annotation annotation) { |
169 | 0 | for (String match : _excludedPackages) { |
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|
171 | 0 | if (annotation.annotationType().getName().indexOf(match) > -1) { |
172 | 0 | return true; |
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} |
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} |
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176 | 0 | return false; |
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} |
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public void setExcludedPackages(List<String> packages) { |
180 | 0 | _excludedPackages = packages; |
181 | 0 | } |
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} |
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