opendaylight/config/yang-jmx-generator-plugin/src/main/java/org/opendaylight/controller/config/yangjmxgenerator/plugin/ftl/directives/HeaderDirective.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.directives;
   9
  10 import java.io.IOException;
  11 import java.io.Writer;
  12 import java.util.Date;
  13 import java.util.Map;
  14
  15 import org.opendaylight.controller.config.yangjmxgenerator.plugin.JMXGenerator;
  16 import org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.model.Header;
  17
  18 import com.google.common.base.Preconditions;
  19
  20 import freemarker.core.Environment;
  21 import freemarker.ext.beans.StringModel;
  22 import freemarker.template.TemplateDirectiveBody;
  23 import freemarker.template.TemplateDirectiveModel;
  24 import freemarker.template.TemplateException;
  25 import freemarker.template.TemplateModel;
  26
  27 /**
  28  * Add annotations to freemarker template.
  29  */
  30 public class HeaderDirective implements TemplateDirectiveModel {
  31
  32     private static final String GENERATOR_CLASS = JMXGenerator.class
  33             .getCanonicalName();
  34     private static final String OBJECT = "header";
  35
  36     @Override
  37     public void execute(Environment env, Map params, TemplateModel[] loopVars,
  38             TemplateDirectiveBody body) throws TemplateException, IOException {
  39
  40         // FIXME do not allow null header
  41         // Preconditions.checkNotNull(object, "Null type declaration");
  42         Object object = params.get(OBJECT);
  43         Header header = null;
  44         if (object != null) {
  45             object = ((StringModel) object).getWrappedObject();
  46             Preconditions.checkArgument(object instanceof Header,
  47                     "Template header should be instance of " + Header.class
  48                             + " but was " + object.getClass());
  49
  50             header = (Header) object;
  51         }
  52
  53         Writer out = env.getOut();
  54         StringBuilder build = new StringBuilder();
  55         build.append("/**");
  56         build.append(System.lineSeparator());
  57         build.append("* ");
  58         build.append("Generated file");
  59         build.append(System.lineSeparator());
  60         build.append(System.lineSeparator());
  61         build.append("* ");
  62         build.append("Generated from: ");
  63         build.append(header != null ? header.toString() : "");
  64         build.append(System.lineSeparator());
  65         build.append("* ");
  66         build.append("Generated by: " + GENERATOR_CLASS);
  67         build.append(System.lineSeparator());
  68         build.append("* ");
  69         build.append("Generated at: " + new Date());
  70         build.append(System.lineSeparator());
  71         build.append("* ");
  72         build.append(System.lineSeparator());
  73         build.append("* ");
  74         build.append("Do not modify this file unless it is present under src/main directory ");
  75         build.append(System.lineSeparator());
  76         build.append("*/");
  77         build.append(System.lineSeparator());
  78
  79         out.write(build.toString().toCharArray());
  80     }
  81 }