99 lines
4.1 KiB
Java
99 lines
4.1 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.ddf;
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import java.util.ArrayList;
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import java.util.List;
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import org.apache.poi.util.LittleEndian;
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/**
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* Generates a property given a reference into the byte array storing that property.
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*/
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public final class EscherPropertyFactory {
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/**
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* Create new properties from a byte array.
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*
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* @param data The byte array containing the property
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* @param offset The starting offset into the byte array
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* @param numProperties The number of properties to be read
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* @return The new properties
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*/
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public List<EscherProperty> createProperties(byte[] data, int offset, short numProperties) {
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List<EscherProperty> results = new ArrayList<EscherProperty>();
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int pos = offset;
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for (int i = 0; i < numProperties; i++) {
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short propId;
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int propData;
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propId = LittleEndian.getShort( data, pos );
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propData = LittleEndian.getInt( data, pos + 2 );
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short propNumber = (short) ( propId & (short) 0x3FFF );
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boolean isComplex = ( propId & (short) 0x8000 ) != 0;
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// boolean isBlipId = ( propId & (short) 0x4000 ) != 0;
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byte propertyType = EscherProperties.getPropertyType(propNumber);
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EscherProperty ep;
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switch (propertyType) {
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case EscherPropertyMetaData.TYPE_BOOLEAN:
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ep = new EscherBoolProperty( propId, propData );
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break;
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case EscherPropertyMetaData.TYPE_RGB:
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ep = new EscherRGBProperty( propId, propData );
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break;
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case EscherPropertyMetaData.TYPE_SHAPEPATH:
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ep = new EscherShapePathProperty( propId, propData );
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break;
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default:
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if ( !isComplex ) {
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ep = new EscherSimpleProperty( propId, propData );
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} else if ( propertyType == EscherPropertyMetaData.TYPE_ARRAY) {
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ep = new EscherArrayProperty( propId, new byte[propData]);
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} else {
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ep = new EscherComplexProperty( propId, new byte[propData]);
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}
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break;
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}
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results.add( ep );
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pos += 6;
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}
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// Get complex data
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for (EscherProperty p : results) {
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if (p instanceof EscherComplexProperty) {
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if (p instanceof EscherArrayProperty) {
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pos += ((EscherArrayProperty)p).setArrayData(data, pos);
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} else {
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byte[] complexData = ((EscherComplexProperty)p).getComplexData();
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int leftover = data.length - pos;
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if (leftover < complexData.length) {
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throw new IllegalStateException("Could not read complex escher property, length was " + complexData.length + ", but had only " +
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leftover + " bytes left");
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}
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System.arraycopy(data, pos, complexData, 0, complexData.length);
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pos += complexData.length;
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}
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}
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}
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return results;
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}
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}
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