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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 java.util.List;
-
- /**
- * A base class that encapsulates common features of
- * ActiveEnvironmentGroup and ResourceEnvironmentGroup
- */
- public abstract class AbstractEnvironmentGroup extends AbstractNamedAFPObject {
-
- /** the collection of MapDataResource objects */
- protected final List mapDataResources = null;
-
- /** 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() {
- return (MapPageOverlay)getLastElement(this.mapPageOverlays);
- }
-
- /**
- * Get last element.
- * @param list of elements
- * @return last element or null if none
- */
- protected Object getLastElement(List list) {
- if (list != null && list.size() > 0) {
- return list.get(list.size() - 1);
- } else {
- return null;
- }
- }
-
- /** {@inheritDoc} */
- protected void writeContent(OutputStream os) throws IOException {
- super.writeContent(os);
- }
- }
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