opendaylight/config/yang-jmx-generator-plugin/src/main/java/org/opendaylight/controller/config/yangjmxgenerator/plugin/ftl/directives/FieldsDirectiveProg.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.FtlTemplate;
  16 import org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.model.Field;
  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 fields to freemarker template.
  29  */
  30 public class FieldsDirectiveProg 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<Field> fields = Lists.newArrayList();
  39
  40         if (object != null) {
  41             if (object instanceof SimpleSequence)
  42                 fields = ((SimpleSequence) object).toList();
  43             else if (object instanceof FtlTemplate) {
  44                 fields = ((FtlTemplate) object).getFields();
  45             } else
  46                 throw new IllegalArgumentException(
  47                         "Object must be a SimpleSequence or instance of "
  48                                 + FtlTemplate.class + "but was "
  49                                 + object.getClass());
  50         }
  51
  52         Writer out = env.getOut();
  53         StringBuilder build = new StringBuilder();
  54         for (Field field : fields) {
  55             build.append("     private ");
  56             for (String mod : field.getModifiers()) {
  57                 build.append(mod + " ");
  58             }
  59             build.append(field.getType() + " ");
  60             build.append(field.getName());
  61             if (field.getDefinition() != null)
  62                 build.append(" = " + field.getDefinition());
  63             build.append(";");
  64             build.append(System.lineSeparator());
  65         }
  66
  67         if (!fields.isEmpty())
  68             out.write(build.toString().toCharArray());
  69     }
  70
  71     // String templateStr = "Hello ${user}";
  72     // Template t = new Template("name", new StringReader(templateStr), new
  73     // Configuration());
  74 }