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package org.apache.tapestry.annotations; |
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import java.lang.reflect.Method; |
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import java.lang.reflect.Modifier; |
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import org.apache.hivemind.ApplicationRuntimeException; |
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import org.apache.hivemind.Location; |
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import org.apache.hivemind.service.BodyBuilder; |
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import org.apache.hivemind.service.MethodSignature; |
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import org.apache.tapestry.Tapestry; |
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import org.apache.tapestry.enhance.EnhancementOperation; |
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import org.apache.tapestry.spec.IComponentSpecification; |
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public class MessageAnnotationWorker implements MethodAnnotationEnhancementWorker |
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{ |
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public void performEnhancement(EnhancementOperation op, IComponentSpecification spec, |
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Method method, Location location) |
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{ |
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if (!method.getReturnType().equals(String.class)) |
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throw new ApplicationRuntimeException(AnnotationMessages.returnStringOnly(method |
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.getReturnType())); |
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Message message = method.getAnnotation(Message.class); |
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String keyName = message.value(); |
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if (keyName.equals("")) |
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keyName = AnnotationUtils.convertMethodNameToKeyName(method.getName()); |
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BodyBuilder builder = new BodyBuilder(); |
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builder.begin(); |
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Class[] parameterTypes = method.getParameterTypes(); |
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int paramCount = Tapestry.size(parameterTypes); |
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if (paramCount > 0) |
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{ |
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builder.addln("java.lang.Object[] params = new java.lang.Object[{0}];", paramCount); |
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for (int i = 0; i < paramCount; i++) |
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{ |
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builder.add("params[{0}] = ", i); |
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if (parameterTypes[i].isPrimitive()) |
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builder.add("($w) "); |
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builder.addln("${0};", i + 1); |
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} |
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} |
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builder.add("return getMessages()."); |
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if (paramCount == 0) |
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builder.addln("getMessage(\"{0}\");", keyName); |
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else |
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builder.addln("format(\"{0}\", params);", keyName); |
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builder.end(); |
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op.addMethod(Modifier.PUBLIC, new MethodSignature(method), builder.toString(), location); |
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if (isGetter(method)) |
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op.claimReadonlyProperty(AnnotationUtils.getPropertyName(method)); |
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} |
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boolean isGetter(Method method) |
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{ |
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return method.getName().startsWith("get") && method.getParameterTypes().length == 0; |
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} |
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} |