108 lines
4.4 KiB
Java
108 lines
4.4 KiB
Java
/* ====================================================================
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Licensed to the Apache Software Foundation (ASF) under one or more
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contributor license agreements. See the NOTICE file distributed with
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this work for additional information regarding copyright ownership.
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The ASF licenses this file to You under the Apache License, Version 2.0
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(the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==================================================================== */
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package org.apache.poi.hemf.record;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.poi.hemf.hemfplus.record.HemfPlusRecord;
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import org.apache.poi.hemf.hemfplus.record.HemfPlusRecordType;
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import org.apache.poi.util.Internal;
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import org.apache.poi.util.LittleEndian;
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import org.apache.poi.util.RecordFormatException;
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/**
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* An HemfCommentEMFPlus may contain one or more EMFPlus records
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*/
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@Internal
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public class HemfCommentEMFPlus extends AbstractHemfComment {
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long dataSize;
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public HemfCommentEMFPlus(byte[] rawBytes) {
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//these rawBytes contain only the EMFPlusRecord(s?)
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//the EmfComment type, size, datasize and comment identifier have all been stripped.
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//The EmfPlus type, flags, size, data size should start at rawBytes[0]
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super(rawBytes);
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}
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public List<HemfPlusRecord> getRecords() {
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return HemfPlusParser.parse(getRawBytes());
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}
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private static class HemfPlusParser {
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public static List<HemfPlusRecord> parse(byte[] bytes) {
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List<HemfPlusRecord> records = new ArrayList<HemfPlusRecord>();
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int offset = 0;
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while (offset < bytes.length) {
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if (offset + 12 > bytes.length) {
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//if header will go beyond bytes, stop now
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//TODO: log or throw
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break;
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}
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int type = LittleEndian.getUShort(bytes, offset); offset += LittleEndian.SHORT_SIZE;
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int flags = LittleEndian.getUShort(bytes, offset); offset += LittleEndian.SHORT_SIZE;
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long sizeLong = LittleEndian.getUInt(bytes, offset); offset += LittleEndian.INT_SIZE;
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if (sizeLong >= Integer.MAX_VALUE) {
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throw new RecordFormatException("size of emf record >= Integer.MAX_VALUE");
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}
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int size = (int)sizeLong;
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long dataSizeLong = LittleEndian.getUInt(bytes, offset); offset += LittleEndian.INT_SIZE;
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if (dataSizeLong >= Integer.MAX_VALUE) {
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throw new RuntimeException("data size of emfplus record cannot be >= Integer.MAX_VALUE");
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}
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int dataSize = (int)dataSizeLong;
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if (dataSize + offset > bytes.length) {
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//TODO: log or throw?
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break;
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}
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HemfPlusRecord record = buildRecord(type, flags, dataSize, offset, bytes);
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records.add(record);
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offset += dataSize;
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}
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return records;
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}
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private static HemfPlusRecord buildRecord(int recordId, int flags, int size, int offset, byte[] bytes) {
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HemfPlusRecord record = null;
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HemfPlusRecordType type = HemfPlusRecordType.getById(recordId);
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if (type == null) {
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throw new RuntimeException("Undefined record of type:"+recordId);
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}
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try {
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record = type.clazz.newInstance();
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} catch (InstantiationException e) {
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throw new RuntimeException(e);
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} catch (IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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byte[] dataBytes = new byte[size];
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System.arraycopy(bytes, offset, dataBytes, 0, size);
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try {
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record.init(dataBytes, recordId, flags);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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return record;
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}
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}
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}
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