start implementing paging and server side sorting for users, groups and repositories

scm-webapp/src/main/java/sonia/scm/api/rest/resources/AbstractManagerResource.java

@@ -42,6 +42,7 @@ import sonia.scm.LastModifiedAware;
 import sonia.scm.Manager;
 import sonia.scm.ModelObject;
 import sonia.scm.security.ScmSecurityException;
+import sonia.scm.util.AssertUtil;
 import sonia.scm.util.Util;
 
 //~--- JDK imports ------------------------------------------------------------
@@ -51,12 +52,14 @@ import java.util.Date;
 
 import javax.ws.rs.Consumes;
 import javax.ws.rs.DELETE;
+import javax.ws.rs.DefaultValue;
 import javax.ws.rs.GET;
 import javax.ws.rs.POST;
 import javax.ws.rs.PUT;
 import javax.ws.rs.Path;
 import javax.ws.rs.PathParam;
 import javax.ws.rs.Produces;
+import javax.ws.rs.QueryParam;
 import javax.ws.rs.core.CacheControl;
 import javax.ws.rs.core.Context;
 import javax.ws.rs.core.EntityTag;
@@ -296,13 +299,21 @@ public abstract class AbstractManagerResource<T extends ModelObject,
    *
    *
    * @param request
+   * @param start
+   * @param limit
+   * @param sortby
+   * @param desc
    * @return
    */
   @GET
   @Produces({ MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON })
-  public Response getAll(@Context Request request)
+  public Response getAll(@Context Request request, @DefaultValue("0")
+  @QueryParam("start") int start, @DefaultValue("-1")
+  @QueryParam("limit") int limit, @QueryParam("sortby") String sortby,
+                                  @DefaultValue("false")
+  @QueryParam("desc") boolean desc)
   {
-    Collection<T> items = manager.getAll();
+    Collection<T> items = fetchItems(sortby, desc, start, limit);
 
     if (Util.isNotEmpty(items))
     {
@@ -473,6 +484,37 @@ public abstract class AbstractManagerResource<T extends ModelObject,
     return builder.build();
   }
 
+  /**
+   * Method description
+   *
+   *
+   *
+   * @param sortby
+   * @param desc
+   * @param start
+   * @param limit
+   *
+   * @return
+   */
+  private Collection<T> fetchItems(String sortby, boolean desc, int start,
+                                   int limit)
+  {
+    AssertUtil.assertPositive(start);
+
+    Collection<T> items = null;
+
+    if (limit > 0)
+    {
+      items = manager.getAll(sortby, desc, start, limit);
+    }
+    else
+    {
+      items = manager.getAll();
+    }
+
+    return items;
+  }
+
   //~--- get methods ----------------------------------------------------------
 
   /**

scm-webapp/src/main/java/sonia/scm/group/xml/XmlGroupManager.java

@@ -54,6 +54,7 @@ import sonia.scm.search.SearchUtil;
 import sonia.scm.security.SecurityContext;
 import sonia.scm.store.Store;
 import sonia.scm.store.StoreFactory;
+import sonia.scm.util.CollectionAppender;
 import sonia.scm.util.SecurityUtil;
 import sonia.scm.util.Util;
 
@@ -362,6 +363,34 @@ public class XmlGroupManager extends AbstractGroupManager
     return groups;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param sortby
+   * @param desc
+   * @param start
+   * @param limit
+   *
+   * @return
+   */
+  @Override
+  public Collection<Group> getAll(String sortby, boolean desc, int start,
+                                  int limit)
+  {
+
+    // TODO sort
+    return Util.createSubCollection(groupDB.values(),
+                                    new CollectionAppender<Group>()
+    {
+      @Override
+      public void append(Collection<Group> collection, Group item)
+      {
+        collection.add(item.clone());
+      }
+    }, start, limit);
+  }
+
   /**
    * Method description
    *

scm-webapp/src/main/java/sonia/scm/repository/xml/XmlRepositoryManager.java

@@ -59,8 +59,10 @@ import sonia.scm.security.ScmSecurityException;
 import sonia.scm.store.Store;
 import sonia.scm.store.StoreFactory;
 import sonia.scm.util.AssertUtil;
+import sonia.scm.util.CollectionAppender;
 import sonia.scm.util.IOUtil;
 import sonia.scm.util.SecurityUtil;
+import sonia.scm.util.Util;
 import sonia.scm.web.security.WebSecurityContext;
 
 //~--- JDK imports ------------------------------------------------------------
@@ -394,6 +396,34 @@ public class XmlRepositoryManager extends AbstractRepositoryManager
     return repositories;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param sortby
+   * @param desc
+   * @param start
+   * @param limit
+   *
+   * @return
+   */
+  @Override
+  public Collection<Repository> getAll(String sortby, boolean desc, int start,
+          int limit)
+  {
+
+    // TODO sort
+    return Util.createSubCollection(repositoryDB.values(),
+                                    new CollectionAppender<Repository>()
+    {
+      @Override
+      public void append(Collection<Repository> collection, Repository item)
+      {
+        collection.add(item.clone());
+      }
+    }, start, limit);
+  }
+
   /**
    * Method description
    *

scm-webapp/src/main/java/sonia/scm/user/xml/XmlUserManager.java

@@ -35,6 +35,7 @@ package sonia.scm.user.xml;
 
 //~--- non-JDK imports --------------------------------------------------------
 
+import com.google.common.collect.Collections2;
 import com.google.inject.Inject;
 import com.google.inject.Provider;
 import com.google.inject.Singleton;
@@ -55,6 +56,7 @@ import sonia.scm.user.User;
 import sonia.scm.user.UserAllreadyExistException;
 import sonia.scm.user.UserException;
 import sonia.scm.util.AssertUtil;
+import sonia.scm.util.CollectionAppender;
 import sonia.scm.util.IOUtil;
 import sonia.scm.util.SecurityUtil;
 import sonia.scm.util.Util;
@@ -65,8 +67,11 @@ import sonia.scm.web.security.WebSecurityContext;
 import java.io.IOException;
 import java.io.InputStream;
 
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Iterator;
 import java.util.LinkedList;
+import java.util.List;
 
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
@@ -402,6 +407,34 @@ public class XmlUserManager extends AbstractUserManager
     return users;
   }
 
+  /**
+   * Method description
+   *
+   *
+   * @param sortby
+   * @param desc
+   * @param start
+   * @param limit
+   *
+   * @return
+   */
+  @Override
+  public Collection<User> getAll(String sortby, boolean desc, int start,
+                                 int limit)
+  {
+
+    // TODO sort
+    return Util.createSubCollection(userDB.values(),
+                                    new CollectionAppender<User>()
+    {
+      @Override
+      public void append(Collection<User> collection, User item)
+      {
+        collection.add(item.clone());
+      }
+    }, start, limit);
+  }
+
   /**
    * Method description
    *