added addPages(Collection<T> webPages, Function<T, WebPage> mapper) method on SitemapGenerator so that it's possible to use functional programming syntax to populate sitemap

Author: jirka.pinkas@gmail.com

README.md

@@ -12,7 +12,7 @@ First add this library to classpath:
     <dependency>
       <groupId>cz.jiripinkas</groupId>
       <artifactId>jsitemapgenerator</artifactId>
-      <version>3.0</version>
+      <version>3.1</version>
     </dependency>
 
 If you want to use "ping google / bing" functionality, also add this library to classpath:
@@ -25,30 +25,27 @@ If you want to use "ping google / bing" functionality, also add this library to
 
 ### How to create a sitemap:
 
-
     // create web sitemap for web http://www.javavids.com
-    SitemapGenerator sitemapGenerator = new SitemapGenerator("http://www.javavids.com");
+    SitemapGenerator sg = new SitemapGenerator("http://www.javavids.com");
     // add some URLs
-    sitemapGenerator.addPage(WebPage.builder()
-        .name("index.php")
-        .priorityMax()
-        .changeFreqNever()
-        .lastModNow()
-        .build()
-    );
-    sitemapGenerator.addPage(WebPage.builder()
-        .name("latest.php")
-        .build()
-    );
-    sitemapGenerator.addPage(WebPage.builder()
-        .name("contact.php")
-        .build()
-    );
+    sg.addPage(WebPage.builder().nameRoot().priorityMax().changeFreqNever().lastModNow().build())
+      .addPage(WebPage.builder().name("latest.php").build())
+      .addPage(WebPage.builder().name("contact.php").build());
     // generate sitemap and save it to file /var/www/sitemap.xml
     File file = new File("/var/www/sitemap.xml");
-    sitemapGenerator.constructAndSaveSitemap(file);
+    sg.constructAndSaveSitemap(file);
     // inform Google that this sitemap has changed
-    sitemapGenerator.pingGoogle();
+    sg.pingGoogle();
+
+### How to create a sitemap populated with list of pages:
+
+    File file = new File("/var/www/sitemap.xml");
+    List<String> pages = Arrays.asList("firstPage", "secondPage", "otherPage");
+    // create web sitemap for web http://www.javavids.com
+    new SitemapGenerator("http://www.javavids.com")
+        .addPage(WebPage.builder().nameRoot().priorityMax().changeFreqNever().lastModNow().build())
+        .addPages(urls, page -> WebPage.builder().name("dir/" + page).priorityMax().changeFreqNever().lastModNow().build())
+        .constructAndSaveSitemap(file);
 
 ### How to create a sitemap index:
 

pom.xml

@@ -3,7 +3,7 @@
 	<modelVersion>4.0.0</modelVersion>
 	<groupId>cz.jiripinkas</groupId>
 	<artifactId>jsitemapgenerator</artifactId>
-	<version>3.0</version>
+	<version>3.1</version>
 	<packaging>jar</packaging>
 	<name>Java sitemap generator</name>
 	<description>This library generates a web sitemap and can ping Google that it has changed. This project has been inspired by sitemapgen4j, but is much more focused on traditional web sitemap and ease of use.</description>

src/main/java/cz/jiripinkas/jsitemapgenerator/AbstractGenerator.java

@@ -1,12 +1,13 @@
 package cz.jiripinkas.jsitemapgenerator;
 
+import cz.jiripinkas.jsitemapgenerator.exception.InvalidUrlException;
+
 import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.Collection;
 import java.util.Map;
 import java.util.TreeMap;
-
-import cz.jiripinkas.jsitemapgenerator.exception.InvalidUrlException;
+import java.util.function.Function;
 
 public abstract class AbstractGenerator {
 
@@ -69,4 +70,19 @@ public AbstractGenerator addPages(Collection<WebPage> webPages) {
         return this;
     }
 
+    /**
+     * Add collection of pages to sitemap
+     *
+     * @param <T> This is the type parameter
+     * @param webPages Collection of pages
+     * @param mapper Mapper function which transforms some object to WebPage
+     * @return this
+     */
+    public <T> AbstractGenerator addPages(Collection<T> webPages, Function<T, WebPage> mapper) {
+        for (T element : webPages) {
+            addPage(mapper.apply(element));
+        }
+        return this;
+    }
+
 }

src/main/java/cz/jiripinkas/jsitemapgenerator/generator/RssGenerator.java

@@ -5,6 +5,7 @@
 
 import java.text.SimpleDateFormat;
 import java.util.*;
+import java.util.function.Function;
 
 public class RssGenerator extends AbstractGenerator {
 
@@ -122,5 +123,19 @@ public RssGenerator addPages(Collection<WebPage> webPages) {
         return this;
     }
 
+    /**
+     * Add collection of pages to sitemap
+     *
+     * @param webPages Collection of pages
+     * @param mapper Mapper function which transforms some object to WebPage
+     * @return this
+     */
+    public <T> RssGenerator addPages(Collection<T> webPages, Function<T, WebPage> mapper) {
+        for (T element : webPages) {
+            addPage(mapper.apply(element));
+        }
+        return this;
+    }
+
 
 }

src/main/java/cz/jiripinkas/jsitemapgenerator/generator/SitemapGenerator.java

@@ -1,5 +1,6 @@
 package cz.jiripinkas.jsitemapgenerator.generator;
 
+import cz.jiripinkas.jsitemapgenerator.AbstractGenerator;
 import cz.jiripinkas.jsitemapgenerator.AbstractSitemapGenerator;
 import cz.jiripinkas.jsitemapgenerator.Image;
 import cz.jiripinkas.jsitemapgenerator.WebPage;
@@ -11,6 +12,7 @@
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.function.Function;
 
 public class SitemapGenerator extends AbstractSitemapGenerator {
 
@@ -154,4 +156,18 @@ public SitemapGenerator addPages(Collection<WebPage> webPages) {
         return this;
     }
 
+    /**
+     * Add collection of pages to sitemap
+     *
+     * @param webPages Collection of pages
+     * @param mapper Mapper function which transforms some object to WebPage
+     * @return this
+     */
+    public <T> SitemapGenerator addPages(Collection<T> webPages, Function<T, WebPage> mapper) {
+        for (T element : webPages) {
+            addPage(mapper.apply(element));
+        }
+        return this;
+    }
+
 }