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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.Collection;
- import java.util.Iterator;
-
- import org.apache.fop.afp.Completable;
- import org.apache.fop.afp.Factory;
- import org.apache.fop.afp.Streamable;
-
-
- /**
- * An abstract container of resource objects
- */
- public abstract class AbstractResourceGroupContainer extends AbstractPageObject
- implements Streamable {
-
- /** The container started state */
- protected boolean started;
-
- /** the resource group object */
- protected ResourceGroup resourceGroup;
-
- /**
- * Default constructor
- *
- * @param factory the object factory
- */
- public AbstractResourceGroupContainer(Factory factory) {
- super(factory);
- }
-
- /**
- * Named constructor
- *
- * @param factory the object factory
- * @param name the name of this resource container
- */
- public AbstractResourceGroupContainer(Factory factory, String name) {
- super(factory, name);
- }
-
- /**
- * Construct a new page object for the specified name argument, the page
- * name should be an 8 character identifier.
- *
- * @param factory
- * the object factory
- * @param name
- * the name of the page.
- * @param width
- * the width of the page.
- * @param height
- * the height of the page.
- * @param rotation
- * the rotation of the page.
- * @param widthRes
- * the width resolution of the page.
- * @param heightRes
- * the height resolution of the page.
- */
- public AbstractResourceGroupContainer(Factory factory,
- String name, int width, int height, int rotation, int widthRes, int heightRes) {
- super(factory, name, width, height, rotation, widthRes, heightRes);
- }
-
- /**
- * Return the number of resources in this container
- *
- * @return the number of resources in this container
- */
- protected int getResourceCount() {
- if (resourceGroup != null) {
- return resourceGroup.getResourceCount();
- }
- return 0;
- }
-
- /**
- * Returns true if this resource group container contains resources
- *
- * @return true if this resource group container contains resources
- */
- protected boolean hasResources() {
- return resourceGroup != null && resourceGroup.getResourceCount() > 0;
- }
-
- /**
- * Returns the resource group in this resource group container
- *
- * @return the resource group in this resource group container
- */
- public ResourceGroup getResourceGroup() {
- if (resourceGroup == null) {
- resourceGroup = factory.createResourceGroup();
- }
- return resourceGroup;
- }
-
- // /** {@inheritDoc} */
- // protected void writeContent(OutputStream os) throws IOException {
- // if (resourceGroup != null) {
- // resourceGroup.writeToStream(os);
- // }
- // super.writeContent(os);
- // }
-
- /** {@inheritDoc} */
- @Override
- public void writeToStream(OutputStream os) throws IOException {
- if (!started) {
- writeStart(os);
- started = true;
- }
-
- writeContent(os);
-
- if (complete) {
- writeEnd(os);
- }
- }
-
- /** {@inheritDoc} */
- @Override
- protected void writeObjects(Collection/*<AbstractAFPObject>*/ objects, OutputStream os)
- throws IOException {
- writeObjects(objects, os, false);
- }
-
- /**
- * Writes a collection of {@link AbstractAFPObject}s to the AFP Datastream.
- *
- * @param objects a list of AFPObjects
- * @param os The stream to write to
- * @param forceWrite true if writing should happen in any case
- * @throws java.io.IOException an I/O exception of some sort has occurred.
- */
- protected void writeObjects(Collection/*<AbstractAFPObject>*/ objects, OutputStream os,
- boolean forceWrite) throws IOException {
- if (objects != null && objects.size() > 0) {
- Iterator it = objects.iterator();
- while (it.hasNext()) {
- AbstractAFPObject ao = (AbstractAFPObject)it.next();
- if (forceWrite || canWrite(ao)) {
- ao.writeToStream(os);
- it.remove();
- } else {
- break;
- }
- }
- }
- }
-
- /**
- * Returns true if this object can be written
- *
- * @param obj an AFP object
- * @return true if this object can be written
- */
- protected boolean canWrite(AbstractAFPObject obj) {
- if (obj instanceof Completable) {
- return ((Completable)obj).isComplete();
- } else {
- return this.isComplete();
- }
- }
- }
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