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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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