opendaylight/config/yang-jmx-generator-plugin/src/main/java/org/opendaylight/controller/config/yangjmxgenerator/plugin/ftl/directives/AnnotationsDirective.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.Annotation;
  17 import org.opendaylight.controller.config.yangjmxgenerator.plugin.ftl.model.Annotation.Parameter;
  18
  19 import com.google.common.collect.Lists;
  20
  21 import freemarker.core.Environment;
  22 import freemarker.template.SimpleSequence;
  23 import freemarker.template.TemplateDirectiveBody;
  24 import freemarker.template.TemplateDirectiveModel;
  25 import freemarker.template.TemplateException;
  26 import freemarker.template.TemplateModel;
  27
  28 /**
  29  * Add annotations to freemarker template.
  30  */
  31 public class AnnotationsDirective implements TemplateDirectiveModel {
  32
  33     private static final String OBJECT = "object";
  34
  35     @Override
  36     public void execute(Environment env, Map params, TemplateModel[] loopVars,
  37             TemplateDirectiveBody body) throws TemplateException, IOException {
  38         Object object = params.get(OBJECT);
  39         List<Annotation> annotations = Lists.newArrayList();
  40
  41         if (object != null) {
  42             if (object instanceof SimpleSequence)
  43                 annotations = ((SimpleSequence) object).toList();
  44             else if (object instanceof FtlTemplate) {
  45                 annotations = ((FtlTemplate) object).getAnnotations();
  46             } else
  47                 throw new IllegalArgumentException(
  48                         "Object must be a SimpleSequence or instance of "
  49                                 + FtlTemplate.class + "but was "
  50                                 + object.getClass());
  51         }
  52
  53         Writer out = env.getOut();
  54         StringBuilder build = new StringBuilder();
  55         writeAnnotations(annotations, build, "");
  56
  57         if (!annotations.isEmpty())
  58             out.write(build.toString().toCharArray());
  59     }
  60
  61     static void writeAnnotations(List<Annotation> annotations,
  62             StringBuilder build, String linePrefix) {
  63         for (Annotation annotation : annotations) {
  64             build.append(linePrefix + "@");
  65             build.append(annotation.getName());
  66             if (!annotation.getParams().isEmpty()) {
  67                 build.append("(");
  68                 for (Parameter param : annotation.getParams()) {
  69                     build.append(param.getKey());
  70                     build.append(" = ");
  71                     build.append(fixString(param.getValue()));
  72                     build.append(", ");
  73                 }
  74                 build.setCharAt(build.length() - 2, ')');
  75             }
  76             build.append(System.lineSeparator());
  77         }
  78     }
  79
  80     private static String fixString(String value) {
  81         // TODO replace with compress single line if possible
  82         return value.replaceAll("\\r\\n|\\r|\\n", " ").replaceAll(" +", " ");
  83     }
  84
  85 }