200 lines
6.2 KiB
Java
200 lines
6.2 KiB
Java
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/* ====================================================================
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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.ddf;
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import org.apache.poi.util.HexDump;
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import org.apache.poi.util.LittleEndian;
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import java.util.Iterator;
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import java.util.List;
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import java.util.ArrayList;
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/**
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* This record is used whenever a escher record is encountered that
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* we do not explicitly support.
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*
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* @author Glen Stampoultzis (glens at apache.org)
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*/
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public class UnknownEscherRecord extends EscherRecord
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{
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private static final byte[] NO_BYTES = new byte[0];
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/** The data for this record not including the the 8 byte header */
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private byte[] thedata = NO_BYTES;
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private List childRecords = new ArrayList();
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public UnknownEscherRecord()
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{
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}
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/**
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* This method deserializes the record from a byte array.
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*
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* @param data The byte array containing the escher record information
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* @param offset The starting offset into <code>data</code>.
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* @param recordFactory May be null since this is not a container record.
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* @return The number of bytes read from the byte array.
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*/
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public int fillFields( byte[] data, int offset, EscherRecordFactory recordFactory )
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{
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int bytesRemaining = readHeader( data, offset );
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if ( isContainerRecord() )
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{
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int bytesWritten = 0;
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thedata = new byte[0];
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offset += 8;
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bytesWritten += 8;
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while ( bytesRemaining > 0 )
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{
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EscherRecord child = recordFactory.createRecord( data, offset );
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int childBytesWritten = child.fillFields( data, offset, recordFactory );
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bytesWritten += childBytesWritten;
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offset += childBytesWritten;
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bytesRemaining -= childBytesWritten;
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getChildRecords().add( child );
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}
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return bytesWritten;
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}
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else
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{
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thedata = new byte[bytesRemaining];
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System.arraycopy( data, offset + 8, thedata, 0, bytesRemaining );
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return bytesRemaining + 8;
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}
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}
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/**
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* Writes this record and any contained records to the supplied byte
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* array.
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*
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* @return the number of bytes written.
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*/
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public int serialize( int offset, byte[] data, EscherSerializationListener listener )
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{
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listener.beforeRecordSerialize( offset, getRecordId(), this );
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LittleEndian.putShort(data, offset, getOptions());
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LittleEndian.putShort(data, offset+2, getRecordId());
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int remainingBytes = thedata.length;
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for ( Iterator iterator = getChildRecords().iterator(); iterator.hasNext(); )
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{
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EscherRecord r = (EscherRecord) iterator.next();
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remainingBytes += r.getRecordSize();
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}
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LittleEndian.putInt(data, offset+4, remainingBytes);
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System.arraycopy(thedata, 0, data, offset+8, thedata.length);
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int pos = offset+8+thedata.length;
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for ( Iterator iterator = getChildRecords().iterator(); iterator.hasNext(); )
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{
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EscherRecord r = (EscherRecord) iterator.next();
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pos += r.serialize(pos, data, listener );
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}
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listener.afterRecordSerialize( pos, getRecordId(), pos - offset, this );
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return pos - offset;
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}
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public byte[] getData()
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{
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return thedata;
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}
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/**
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* Returns the number of bytes that are required to serialize this record.
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*
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* @return Number of bytes
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*/
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public int getRecordSize()
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{
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return 8 + thedata.length;
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}
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public List getChildRecords()
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{
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return childRecords;
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}
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public void setChildRecords( List childRecords )
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{
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this.childRecords = childRecords;
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}
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public Object clone()
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{
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// shallow clone
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return super.clone();
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}
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/**
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* The short name for this record
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*/
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public String getRecordName()
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{
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return "Unknown 0x" + HexDump.toHex(getRecordId());
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}
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public String toString()
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{
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String nl = System.getProperty( "line.separator" );
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StringBuffer children = new StringBuffer();
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if ( getChildRecords().size() > 0 )
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{
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children.append( " children: " + nl );
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for ( Iterator iterator = getChildRecords().iterator(); iterator.hasNext(); )
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{
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EscherRecord record = (EscherRecord) iterator.next();
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children.append( record.toString() );
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children.append( nl );
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}
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}
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String theDumpHex = "";
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try
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{
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if (thedata.length != 0)
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{
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theDumpHex = " Extra Data("+thedata.length+"):" + nl;
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theDumpHex += HexDump.dump(thedata, 0, 0);
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}
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}
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catch ( Exception e )
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{
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theDumpHex = "Error!!";
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}
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return getClass().getName() + ":" + nl +
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" isContainer: " + isContainerRecord() + nl +
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" options: 0x" + HexDump.toHex( getOptions() ) + nl +
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" recordId: 0x" + HexDump.toHex( getRecordId() ) + nl +
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" numchildren: " + getChildRecords().size() + nl +
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theDumpHex +
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children.toString();
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}
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public void addChildRecord( EscherRecord childRecord )
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{
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getChildRecords().add( childRecord );
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}
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}
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