blob: 30ab9bd71d2d632ffa80ab59418ea4fcbdac96c3 [file] [log] [blame]
package groovy.lang;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
public class TracingInterceptor implements Interceptor {
protected Writer writer = new PrintWriter(System.out);
private int indent = 0;
public Writer getWriter() {
return writer;
}
public void setWriter(Writer writer) {
this.writer = writer;
}
public Object beforeInvoke(Object object, String methodName, Object[] arguments) {
write(object, methodName, arguments, "before");
indent++ ;
return null;
}
public Object afterInvoke(Object object, String methodName, Object[] arguments, Object result) {
indent--;
write(object, methodName, arguments, "after ");
return result;
}
public boolean doInvoke() {
return true;
}
private String indent(){
StringBuffer result = new StringBuffer();
for (int i=0; i<indent;i++){
result.append(" ");
}
return result.toString();
}
protected void write(Object object, String methodName, Object[] arguments, final String origin) {
try {
writer.write(indent());
writer.write(origin);
writer.write(" ");
Class theClass = object instanceof Class ? (Class) object: object.getClass();
writeInfo(theClass, methodName, arguments);
writer.write("\n");
writer.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
protected void writeInfo(final Class aClass, String methodName, Object[] arguments) throws IOException {
writer.write(aClass.getName());
writer.write(".");
writer.write(methodName);
writer.write("(");
for (int i = 0; i < arguments.length; i++) {
if (i > 0) writer.write(", ");
Object argument = arguments[i];
writer.write(argument.getClass().getName());
}
writer.write(")");
}
}