Adds the model to work with category collections.

Modified to use modern Java and long instead of BigDecimal.

git-svn-id: https://svn.libreccm.org/ccm/ccm_ng@4424 8810af33-2d31-482b-a856-94f89814c4df

ccm-cms/src/main/java/com/arsdigita/cms/ui/category/CategoryCollectionListModel.java

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2003-2004 Red Hat Inc. All Rights Reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+package com.arsdigita.cms.ui.category;
+
+import com.arsdigita.bebop.list.ListModel;
+import org.libreccm.categorization.Category;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+/**
+ * A {@link ListModel} that iterates over categories via a cursor.
+ *
+ * @author <a href="mailto:yannick.buelter@yabue.de">Yannick Bülter</a>
+ */
+public final class CategoryCollectionListModel implements ListModel {
+
+    private Category m_cat;
+    private long m_excludedID;
+    private Iterator<Category> iterator;
+
+
+    /**
+     * Constructs a new <code>CategoryCollectionListModel</code>
+     */
+    public CategoryCollectionListModel(Collection<Category> coll) {
+        this(coll, -1); //Hopefully a decent replacement for null in BigDecimal. Negative ids would be weird...
+    }
+
+    /**
+     * Constructs a new <code>CategoryCollectionListModel</code>
+     */
+    public CategoryCollectionListModel(Collection<Category> coll,
+                                       long excludedID) {
+
+        m_excludedID = excludedID;
+        m_cat = null;
+        iterator = coll.iterator();
+    }
+
+    public boolean next() {
+        if (iterator.hasNext()) {
+            final Category category = iterator.next();
+            if (Long.parseLong(category.getUniqueId()) == m_excludedID) {
+                return next();
+            } else {
+                m_cat = category;
+                return true;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    private Category getCategory() {
+        if ( m_cat == null ) {
+            throw new IllegalStateException("call next() first");
+        }
+        return m_cat;
+    }
+
+    /**
+     * Reads the name of the category.
+     *
+     * Quasimodo:
+     * Modified to ensure that the value is read from Category (and not the
+     * localized version). This is necessary because we are in the admin GUI,
+     * a localized version would be confusing.
+     */
+    public Object getElement() {
+        return getCategory().getName();
+    }
+
+    public String getKey() {
+        return getCategory().getUniqueId();
+    }
+}