1 files changed, 101 insertions, 0 deletions
diff --git a/src/java/org/apache/fop/afp/modca/AbstractEnvironmentGroup.java b/src/java/org/apache/fop/afp/modca/AbstractEnvironmentGroup.java
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+++ b/src/java/org/apache/fop/afp/modca/AbstractEnvironmentGroup.java
@@ -0,0 +1,101 @@
+/*
+ * 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 java.util.List;
+
+/**
+ * A base class that encapsulates common features of
+ * ActiveEnvironmentGroup and ResourceEnvironmentGroup
+ */
+public abstract class AbstractEnvironmentGroup extends AbstractNamedAFPObject {
+
+    /**
+     * The collection of MapPageOverlay objects
+     */
+    protected List mapPageOverlays = null;
+
+    /**
+     * Main constructor
+     * 
+     * @param name the object name
+     */
+    public AbstractEnvironmentGroup(String name) {
+        super(name);
+    }
+
+    private List getMapPageOverlays() {
+        if (mapPageOverlays == null) {
+            mapPageOverlays = new java.util.ArrayList();
+        }
+        return mapPageOverlays;
+    }
+
+    /**
+     * Actually creates the MPO object.
+     * Also creates the supporting object (an IPO)
+     * 
+     * @param name the name of the overlay to be used
+     */
+    public void createOverlay(String name) {
+        MapPageOverlay mpo = getCurrentMapPageOverlay();
+        if (mpo == null) {
+            mpo = new MapPageOverlay();
+            getMapPageOverlays().add(mpo);
+        }
+
+        try {
+            mpo.addOverlay(name);
+        } catch (MaximumSizeExceededException msee) {
+            mpo = new MapPageOverlay();
+            getMapPageOverlays().add(mpo);
+            try {
+                mpo.addOverlay(name);
+            } catch (MaximumSizeExceededException ex) {
+                // Should never happen (but log just in case)
+                log.error("createOverlay():: resulted in a MaximumSizeExceededException");
+            }
+        }
+    }
+
+    /**
+     * Getter method for the most recent MapPageOverlay added to the
+     * Active Environment Group (returns null if no MapPageOverlay exist)
+     * 
+     * @return the most recent Map Coded Font
+     */
+    private MapPageOverlay getCurrentMapPageOverlay() {
+        if (mapPageOverlays != null && mapPageOverlays.size() > 0) {
+            return (MapPageOverlay) mapPageOverlays.get(mapPageOverlays.size() - 1);
+        } else {
+            return null;
+        }
+    }
+
+    /** {@inheritDoc} */
+    protected void writeContent(OutputStream os) throws IOException {
+        super.writeContent(os);
+        if (mapPageOverlays != null) {
+            writeObjects(mapPageOverlays, os);
+        }
+    }
+}