opendaylight/config/yang-jmx-generator-plugin/src/main/java/org/opendaylight/controller/config/yangjmxgenerator/plugin/ftl/directives/ConstructorsDirective.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.List;
  13 import java.util.Map;
  14
  15 import org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.GeneralClassTemplate;
  16 import org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.model.Constructor;
  17
  18 import com.google.common.collect.Lists;
  19
  20 import freemarker.core.Environment;
  21 import freemarker.template.SimpleSequence;
  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 ConstructorsDirective implements TemplateDirectiveModel {
  31
  32     private static final String OBJECT = "object";
  33
  34     @Override
  35     public void execute(Environment env, Map params, TemplateModel[] loopVars,
  36             TemplateDirectiveBody body) throws TemplateException, IOException {
  37         Object object = params.get(OBJECT);
  38         List<Constructor> constructors = Lists.newArrayList();
  39
  40         if (object != null) {
  41             if (object instanceof SimpleSequence)
  42                 constructors = ((SimpleSequence) object).toList();
  43             else if (object instanceof GeneralClassTemplate) {
  44                 constructors = ((GeneralClassTemplate) object)
  45                         .getConstructors();
  46             } else
  47                 throw new IllegalArgumentException(
  48                         "Object must be a SimpleSequence or instance of "
  49                                 + GeneralClassTemplate.class + "but was "
  50                                 + object.getClass());
  51         }
  52
  53         Writer out = env.getOut();
  54         StringBuilder build = new StringBuilder();
  55         for (Constructor constr : constructors) {
  56             build.append("    ");
  57             if (constr.isPublic())
  58                 build.append("public ");
  59             build.append(constr.getTypeName() + " ");
  60             build.append("() {");
  61             build.append(System.lineSeparator());
  62             build.append("    ");
  63             build.append("    ");
  64             build.append(constr.getBody());
  65             build.append(System.lineSeparator());
  66             build.append("    ");
  67             build.append("}");
  68             build.append(System.lineSeparator());
  69             build.append(System.lineSeparator());
  70         }
  71
  72         if (!constructors.isEmpty())
  73             out.write(build.toString().toCharArray());
  74     }
  75
  76 }