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151 lines (120 loc) · 4.65 KB
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/**
* Copyright (C) 2010-2011 eBusiness Information, Excilys Group
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed To in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.googlecode.androidannotations.processing;
import java.lang.annotation.Annotation;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import android.util.Log;
import com.googlecode.androidannotations.annotations.Trace;
import com.googlecode.androidannotations.helper.APTCodeModelHelper;
import com.sun.codemodel.JBlock;
import com.sun.codemodel.JClass;
import com.sun.codemodel.JCodeModel;
import com.sun.codemodel.JConditional;
import com.sun.codemodel.JExpr;
import com.sun.codemodel.JExpression;
import com.sun.codemodel.JFieldRef;
import com.sun.codemodel.JInvocation;
import com.sun.codemodel.JMethod;
import com.sun.codemodel.JTryBlock;
import com.sun.codemodel.JVar;
public class TraceProcessor implements ElementProcessor {
private final APTCodeModelHelper helper = new APTCodeModelHelper();
@Override
public Class<? extends Annotation> getTarget() {
return Trace.class;
}
@Override
public void process(Element element, JCodeModel codeModel, EBeansHolder activitiesHolder) {
EBeanHolder holder = activitiesHolder.getEnclosingEBeanHolder(element);
ExecutableElement executableElement = (ExecutableElement) element;
String tag = extractTag(executableElement);
int level = executableElement.getAnnotation(Trace.class).level();
JClass logClass = holder.refClass("android.util.Log");
JClass systemClass = holder.refClass(System.class);
JMethod method = helper.overrideAnnotatedMethod(executableElement, holder);
JBlock previousMethodBody = helper.removeBody(method);
JBlock methodBody = method.body();
JInvocation isLoggableInvocation = logClass.staticInvoke("isLoggable");
isLoggableInvocation.arg(JExpr.lit(tag)).arg(logLevelFromInt(level, logClass));
JConditional ifStatement = methodBody._if(isLoggableInvocation);
JInvocation currentTimeInvoke = systemClass.staticInvoke("currentTimeMillis");
JBlock _thenBody = ifStatement._then();
JVar startDeclaration = _thenBody.decl(codeModel.LONG, "start", currentTimeInvoke);
String methodName = "[" + element.toString() + "]";
// Log In
String logMethodName = logMethodNameFromLevel(level);
JInvocation logEnterInvoke = logClass.staticInvoke(logMethodName);
logEnterInvoke.arg(tag);
JExpression enterMessage = JExpr.lit("Entering " + methodName);
logEnterInvoke.arg(enterMessage);
_thenBody.add(logEnterInvoke);
JTryBlock tryBlock = _thenBody._try();
tryBlock.body().add(previousMethodBody);
JBlock finallyBlock = tryBlock._finally();
JVar durationDeclaration = finallyBlock.decl(codeModel.LONG, "duration", currentTimeInvoke.minus(startDeclaration));
JInvocation logExitInvoke = logClass.staticInvoke(logMethodName);
logExitInvoke.arg(tag);
JExpression exitMessage = JExpr.lit("Exiting " + methodName + ", duration in ms: ").plus(durationDeclaration);
logExitInvoke.arg(exitMessage);
finallyBlock.add(logExitInvoke);
JBlock elseBlock = ifStatement._else();
elseBlock.add(previousMethodBody);
}
private String logMethodNameFromLevel(int level) {
switch (level) {
case Log.DEBUG:
return "d";
case Log.VERBOSE:
return "v";
case Log.INFO:
return "i";
case Log.WARN:
return "w";
case Log.ERROR:
return "e";
default:
throw new IllegalArgumentException("Unrecognized Log level : " + level);
}
}
private JFieldRef logLevelFromInt(int level, JClass logClass) {
switch (level) {
case Log.DEBUG:
return logClass.staticRef("DEBUG");
case Log.VERBOSE:
return logClass.staticRef("VERBOSE");
case Log.INFO:
return logClass.staticRef("INFO");
case Log.WARN:
return logClass.staticRef("WARN");
case Log.ERROR:
return logClass.staticRef("ERROR");
default:
throw new IllegalArgumentException("Unrecognized log level. Given value:" + level);
}
}
private String extractTag(Element element) {
Trace annotation = element.getAnnotation(Trace.class);
String tag = annotation.tag();
if (Trace.DEFAULT_TAG.equals(tag)) {
tag = element.getEnclosingElement().getSimpleName().toString();
}
if (tag.length() > 23) {
tag = tag.substring(0, 23);
}
return tag;
}
}