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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.goca;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.fop.afp.Completable;
import org.apache.fop.afp.Startable;
import org.apache.fop.afp.StructuredData;
import org.apache.fop.afp.modca.AbstractNamedAFPObject;
/**
* A base container of prepared structured AFP objects
*/
public abstract class AbstractGraphicsDrawingOrderContainer extends AbstractNamedAFPObject
implements StructuredData, Completable, Startable {
/** list of objects contained within this container */
protected List/*<StructuredDataObject>*/ objects
= new java.util.ArrayList/*<StructuredDataObject>*/();
/** object is complete */
private boolean complete = false;
/** object has started */
private boolean started = false;
/**
* Default constructor
*/
protected AbstractGraphicsDrawingOrderContainer() {
}
/**
* Named constructor
*
* @param name the name of the container
*/
protected AbstractGraphicsDrawingOrderContainer(String name) {
super(name);
}
/** {@inheritDoc} */
protected void writeStart(OutputStream os) throws IOException {
setStarted(true);
}
/** {@inheritDoc} */
protected void writeContent(OutputStream os) throws IOException {
writeObjects(objects, os);
}
/**
* Adds a given graphics object to this container
*
* @param object the structured data object
*/
public void addObject(StructuredData object) {
objects.add(object);
}
/**
* Adds all the contents of a given graphics container to this container
*
* @param graphicsContainer a graphics container
*/
public void addAll(AbstractGraphicsDrawingOrderContainer graphicsContainer) {
Collection/*<StructuredDataObject>*/ objects = graphicsContainer.getObjects();
objects.addAll(objects);
}
/**
* Returns all the objects in this container
*
* @return all the objects in this container
*/
private Collection getObjects() {
return this.objects;
}
/**
* Removes the last drawing order from this container and returns it
*
* @return the last drawing order from this container or null if empty
*/
public StructuredData removeLast() {
int lastIndex = objects.size() - 1;
StructuredData object = null;
if (lastIndex > -1) {
object = (StructuredData)objects.get(lastIndex);
objects.remove(lastIndex);
}
return object;
}
/**
* Returns the current data length
*
* @return the current data length of this container including
* all enclosed objects (and their containers)
*/
public int getDataLength() {
int dataLen = 0;
Iterator it = objects.iterator();
while (it.hasNext()) {
dataLen += ((StructuredData)it.next()).getDataLength();
}
return dataLen;
}
/** {@inheritDoc} */
public void setComplete(boolean complete) {
Iterator it = objects.iterator();
while (it.hasNext()) {
Object object = it.next();
if (object instanceof Completable) {
((Completable)object).setComplete(true);
}
}
this.complete = true;
}
/** {@inheritDoc} */
public boolean isComplete() {
return this.complete;
}
/** {@inheritDoc} */
public boolean isStarted() {
return this.started;
}
/** {@inheritDoc} */
public void setStarted(boolean started) {
this.started = started;
}
}
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