bundles/org.apache.jasper.glassfish/src/org/apache/jasper/compiler/JspRuntimeContext.java
public long getBytecodeBirthTime(String name) {
        Long time = bytecodeBirthTimes.get(name);
        return (time != null? time.longValue(): 0);
    }
public long getBytecodeBirthTime(String name) {
        Long time = bytecodeBirthTimes.get(name);
        return (time != null? time.longValue(): 0);
    }
Retrieve the time the bytecode for a class was created