Add support for Schema.org/Recipe

java/org/chromium/distiller/SchemaOrgParserAccessor.java

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.distiller;
 
 import org.chromium.distiller.proto.DomDistillerProtos.TimingInfo;
 
 import com.google.gwt.dom.client.Element;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  * This class instantiates SchemaOrgParser and implements MarkupParser.Accessor interface to provide
  * access to properties that SchemaOrgParser has parsed.
  */
 public class SchemaOrgParserAccessor implements MarkupParser.Accessor {
+
+    private static Set<SchemaOrgParser.Type> supportedTypes;
     private final SchemaOrgParser parser;
 
     /**
      * The object that instantiates SchemaOrgParser and implements its MarkupParser.Accessor
      * interface.
      */
     public SchemaOrgParserAccessor(Element root) {
         this(root, (TimingInfo) null);
     }
 
     public SchemaOrgParserAccessor(Element root, TimingInfo timingInfo) {
         parser = new SchemaOrgParser(root, timingInfo);
     }
 
+    static {

[wychen, 2016/03/14 22:58:42]

static sections tend to have performance issues in GWT. Be careful with this.

+        supportedTypes = new HashSet<>();
+        supportedTypes.add(SchemaOrgParser.Type.RECIPE);
+    }
+
     @Override
     public String getTitle() {
         String title = "";
         List<SchemaOrgParser.ArticleItem> articles = parser.getArticleItems();
 
         // Get the "headline" property of the first article that has it.
         for (int i = 0; i < articles.size() && title.isEmpty(); i++) {
             title = articles.get(i).getStringProperty(SchemaOrgParser.HEADLINE_PROP);
         }
 
@@ skipping 112 matching lines @@
     @Override
     public MarkupParser.Article getArticle() {
         List<SchemaOrgParser.ArticleItem> articles = parser.getArticleItems();
         return articles.isEmpty() ? null : articles.get(0).getArticle();
     }
 
     @Override
     public boolean optOut() {
         return false;
     }
+
+    /**
+     * Get schema.org parsed content.
+     *
+     * Content is generated when a main entity is identified or
+     * has only one entity item parsed and it is supported
+     *
+     * @return HTML output from the supported item.
+     */
+    @Override
+    public String getStructuredData() {
+        String output = "";
+        SchemaOrgParser.ThingItem entity = parser.getMainEntity();
+        List<SchemaOrgParser.ThingItem> topLevelEntities =
+                parser.getTopLevelEntities();
+        if (entity == null && topLevelEntities.size() == 1) {
+            entity = topLevelEntities.get(0);
+        }
+        if (entity != null && supportedTypes.contains(entity.getType())) {
+            output = entity.generateOutput();
+        }
+        return output;
+    }
 }