org.apache.poi.ddf.EscherPropertyFactory Maven / Gradle / Ivy
/* ====================================================================
Copyright 2004 Apache Software Foundation
Licensed 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.
==================================================================== */
package org.apache.poi.ddf;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.hssf.record.RecordFormatException;
import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;
/**
* Generates a property given a reference into the byte array storing that property.
*
* @author Glen Stampoultzis
*/
public class EscherPropertyFactory
{
/**
* Create new properties from a byte array.
*
* @param data The byte array containing the property
* @param offset The starting offset into the byte array
* @return The new properties
*/
public List createProperties( byte[] data, int offset, short numProperties )
{
List results = new ArrayList();
int pos = offset;
int complexBytes = 0;
// while ( bytesRemaining >= 6 )
for (int i = 0; i < numProperties; i++)
{
short propId;
int propData;
propId = LittleEndian.getShort( data, pos );
propData = LittleEndian.getInt( data, pos + 2 );
short propNumber = (short) ( propId & (short) 0x3FFF );
boolean isComplex = ( propId & (short) 0x8000 ) != 0;
boolean isBlipId = ( propId & (short) 0x4000 ) != 0;
if ( isComplex )
complexBytes = propData;
else
complexBytes = 0;
byte propertyType = EscherProperties.getPropertyType( (short) propNumber );
if ( propertyType == EscherPropertyMetaData.TYPE_BOOLEAN )
results.add( new EscherBoolProperty( propNumber, propData ) );
else if ( propertyType == EscherPropertyMetaData.TYPE_RGB )
results.add( new EscherRGBProperty( propNumber, propData ) );
else if ( propertyType == EscherPropertyMetaData.TYPE_SHAPEPATH )
results.add( new EscherShapePathProperty( propNumber, propData ) );
else
{
if ( !isComplex )
results.add( new EscherSimpleProperty( propNumber, propData ) );
else
{
if ( propertyType == EscherPropertyMetaData.TYPE_ARRAY)
results.add( new EscherArrayProperty( propId, new byte[propData]) );
else
results.add( new EscherComplexProperty( propId, new byte[propData]) );
}
}
pos += 6;
// bytesRemaining -= 6 + complexBytes;
}
// Get complex data
for ( Iterator iterator = results.iterator(); iterator.hasNext(); )
{
EscherProperty p = (EscherProperty) iterator.next();
if (p instanceof EscherComplexProperty)
{
if (p instanceof EscherArrayProperty)
{
pos += ((EscherArrayProperty)p).setArrayData(data, pos);
}
else
{
byte[] complexData = ((EscherComplexProperty)p).getComplexData();
System.arraycopy(data, pos, complexData, 0, complexData.length);
pos += complexData.length;
}
}
}
return results;
}
}