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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 org.apache.fop.afp.StructuredData;
- import org.apache.fop.afp.util.BinaryUtils;
- import org.apache.fop.afp.util.StringUtils;
-
- /**
- * A GOCA graphics data
- */
- public final class GraphicsData extends AbstractGraphicsDrawingOrderContainer {
-
- /** the maximum graphics data length */
- public static final int MAX_DATA_LEN = 8192;
-
- /** the graphics segment */
- private GraphicsChainedSegment currentSegment = null;
-
- /**
- * Main constructor
- */
- public GraphicsData() {
- }
-
- /** {@inheritDoc} */
- public int getDataLength() {
- return 8 + super.getDataLength();
- }
-
- /**
- * Returns a new segment name
- *
- * @return a new segment name
- */
- public String createSegmentName() {
- return StringUtils.lpad(String.valueOf(
- (super.objects != null ? super.objects.size() : 0) + 1),
- '0', 4);
- }
-
- /**
- * Creates a new graphics segment
- *
- * @return a newly created graphics segment
- */
- public GraphicsChainedSegment newSegment() {
- String segmentName = createSegmentName();
- if (currentSegment == null) {
- currentSegment = new GraphicsChainedSegment(segmentName);
- } else {
- currentSegment.setComplete(true);
- currentSegment = new GraphicsChainedSegment(segmentName, currentSegment.getNameBytes());
- }
- super.addObject(currentSegment);
- return currentSegment;
- }
-
- /** {@inheritDoc} */
- public void addObject(StructuredData object) {
- if (currentSegment == null
- || (currentSegment.getDataLength() + object.getDataLength())
- >= GraphicsChainedSegment.MAX_DATA_LEN) {
- newSegment();
- }
- currentSegment.addObject(object);
- }
-
- /**
- * Removes the current segment from this graphics data
- *
- * @return the current segment from this graphics data
- */
- public StructuredData removeCurrentSegment() {
- this.currentSegment = null;
- return super.removeLast();
- }
-
- /** {@inheritDoc} */
- public void writeToStream(OutputStream os) throws IOException {
- byte[] data = new byte[9];
- copySF(data, SF_CLASS, Type.DATA, Category.GRAPHICS);
- int dataLength = getDataLength();
- byte[] len = BinaryUtils.convert(dataLength, 2);
- data[1] = len[0]; // Length byte 1
- data[2] = len[1]; // Length byte 2
- os.write(data);
-
- writeObjects(objects, os);
- }
-
- /** {@inheritDoc} */
- public String toString() {
- return "GraphicsData";
- }
-
- /**
- * Adds the given segment to this graphics data
- *
- * @param segment a graphics chained segment
- */
- public void addSegment(GraphicsChainedSegment segment) {
- currentSegment = segment;
- super.addObject(currentSegment);
- }
- }
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