Method createCompilerInstance

src/main/java/gate/util/Javac.java:108–142

(String compilerType)

  }

  private static Javac createCompilerInstance(String compilerType)
      throws GateException {
    Class<?> compilerClass = null;
    try {
      // first treat the compiler type as a fully qualified class name
      compilerClass = Gate.getClassLoader().loadClass(compilerType, true);
    } catch(ClassNotFoundException cnfe) {
      // ignore exception but leave compilerClass == null
    }

    if(compilerClass == null || !Javac.class.isAssignableFrom(compilerClass)) { throw new GateException(
        "Unable to load Java compiler class " + compilerType); }

    // At this point we have successfully loaded a compiler class.
    // Now try and create an instance using a no-argument constructor.
    try {
      Constructor<?> noArgConstructor = compilerClass.getConstructor();
      return (Javac)noArgConstructor.newInstance();
    } catch(IllegalAccessException iae) {
      throw new GateException("Cannot access Java compiler class "
          + compilerType, iae);
    } catch(InstantiationException ie) {
      throw new GateException("Cannot instantiate Java compiler class "
          + compilerType, ie);
    } catch(NoSuchMethodException nsme) {
      throw new GateException("Java compiler class " + compilerType
          + " does not have a no-argument constructor", nsme);
    } catch(InvocationTargetException ite) {
      throw new GateException("Exception when constructing Java compiler "
          + "of type " + compilerType, ite.getCause());
    } catch(ExceptionInInitializerError eiie) {
      throw new GateException("Exception when initializing Java compiler "
          + "class " + compilerType, eiie.getCause());
    }
  }

  /**
   * Compile a set of Java sources, and load the resulting classes into the GATE