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diff --git a/src/java/org/apache/fop/afp/modca/AbstractResourceEnvironmentGroupContainer.java b/src/java/org/apache/fop/afp/modca/AbstractResourceEnvironmentGroupContainer.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* $Id: $ */
+
+package org.apache.fop.afp.modca;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.apache.fop.afp.Factory;
+
+
+/**
+ * An abstract class which encapsulates the common features of
+ * Document and PageGroup resource containers
+ */
+public abstract class AbstractResourceEnvironmentGroupContainer
+    extends AbstractResourceGroupContainer {
+
+    /**
+     * The resource environment group used to store complex resources
+     */
+    protected ResourceEnvironmentGroup resourceEnvironmentGroup = null;
+
+    /**
+     * Main constructor
+     *
+     * @param factory the object factory
+     * @param name the name of this resource container
+     */
+    public AbstractResourceEnvironmentGroupContainer(
+            Factory factory, String name) {
+        super(factory, name);
+    }
+
+    /**
+     * Adds a page to the resource container.
+     *
+     * @param page - the Page object
+     */
+    public void addPage(PageObject page) {
+        addObject(page);
+    }
+
+    /**
+     * Adds a PageGroup to the resource container.
+     *
+     * @param pageGroup the PageGroup object
+     */
+    public void addPageGroup(PageGroup pageGroup) {
+        addObject(pageGroup);
+    }
+
+    /**
+     * Creates an InvokeMediaMap on the page.
+     *
+     * @param name
+     *            the name of the media map
+     */
+    public void createInvokeMediumMap(String name) {
+        InvokeMediumMap invokeMediumMap = factory.createInvokeMediumMap(name);
+        addObject(invokeMediumMap);
+    }
+
+    /** {@inheritDoc} */
+    protected void writeContent(OutputStream os) throws IOException {
+        super.writeContent(os);
+        if (resourceEnvironmentGroup != null) {
+            resourceEnvironmentGroup.writeToStream(os);
+        }
+    }
+
+    /**
+     * Returns the resource environment group
+     *
+     * @return the resource environment group
+     */
+    protected ResourceEnvironmentGroup getResourceEnvironmentGroup() {
+        if (resourceEnvironmentGroup == null) {
+            this.resourceEnvironmentGroup = factory.createResourceEnvironmentGroup();
+        }
+        return this.resourceEnvironmentGroup;
+    }
+}