58 lines
2.2 KiB
Java
58 lines
2.2 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.hdgf.pointers;
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import org.apache.poi.util.LittleEndian;
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/**
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* Factor class to create the appropriate pointers, based on the version
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* of the file
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*/
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public final class PointerFactory {
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private int version;
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public PointerFactory(int version) {
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this.version = version;
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}
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public int getVersion() { return version; }
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public Pointer createPointer(byte[] data, int offset) {
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Pointer p;
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if(version >= 6) {
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p = new PointerV6();
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p.type = LittleEndian.getInt(data, offset+0);
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p.address = (int)LittleEndian.getUInt(data, offset+4);
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p.offset = (int)LittleEndian.getUInt(data, offset+8);
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p.length = (int)LittleEndian.getUInt(data, offset+12);
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p.format = LittleEndian.getShort(data, offset+16);
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return p;
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} else if(version == 5) {
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p = new PointerV5();
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p.type = LittleEndian.getShort(data, offset+0);
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p.format = LittleEndian.getShort(data, offset+2);
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p.address = (int)LittleEndian.getUInt(data, offset+4);
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p.offset = (int)LittleEndian.getUInt(data, offset+8);
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p.length = (int)LittleEndian.getUInt(data, offset+12);
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return p;
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} else {
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throw new IllegalArgumentException("Visio files with versions below 5 are not supported, yours was " + version);
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}
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}
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}
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