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1
52
53 package com.go.teaservlet;
54
55 import java.lang.reflect.*;
56 import com.go.trove.util.MergedClass;
57 import com.go.trove.util.ClassInjector;
58 import com.go.tea.runtime.Context;
59 import com.go.tea.runtime.TemplateLoader;
60
61
69 class TemplateAdapter extends TemplateLoader {
70 private final Class  mContextClass;
71 private final ClassInjector mInjector;
72
73 public TemplateAdapter(Class contextClass,
74 ClassInjector injector, String packagePrefix) {
75 super(injector, packagePrefix);
76 mContextClass = contextClass;
77 mInjector = injector;
78 }
79
80 protected Template loadTemplate(String name)
81 throws ClassNotFoundException , NoSuchMethodException , LinkageError
82 {
83 Template t = super.loadTemplate(name);
84 if (t != null) {
85 Class templateContext = t.getContextType();
86 if (!templateContext.isAssignableFrom(mContextClass)) {
87 if (!templateContext.isInterface()) {
88 throw new NoSuchMethodException
89 ("Cannot adapt to context " + templateContext +
90 " because it is not an interface.");
91 }
92
93 Constructor ctor = MergedClass.getConstructor
95 (mInjector, new Class [] {mContextClass, templateContext});
96
97 return new AdaptedTemplate(t, ctor);
98 }
99 }
100 return t;
101 }
102
103 private class AdaptedTemplate implements TemplateLoader.Template {
104 private final Template mTemplate;
105 private final Constructor mContextConstructor;
106
107 public AdaptedTemplate(Template t, Constructor ctor) {
108 mTemplate = t;
109 mContextConstructor = ctor;
110 }
111
112 public TemplateLoader getTemplateLoader() {
113 return TemplateAdapter.this;
114 }
115
116 public String getName() {
117 return mTemplate.getName();
118 }
119
120 public Class getTemplateClass() {
121 return mTemplate.getTemplateClass();
122 }
123
124 public Class getContextType() {
125 return mContextConstructor.getDeclaringClass();
126 }
127
128 public String [] getParameterNames() {
129 return mTemplate.getParameterNames();
130 }
131
132 public Class [] getParameterTypes() {
133 return mTemplate.getParameterTypes();
134 }
135
136 public void execute(Context context, Object [] parameters)
137 throws Exception
138 {
139 context = (Context)mContextConstructor.newInstance
141 (new Object [] {context, null});
142 mTemplate.execute(context, parameters);
143 }
144
145 public String toString() {
146 return mTemplate.toString();
147 }
148 }
149 }
150 |
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