| /* ==================================================================== |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You 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.hpsf; |
| |
| import org.apache.poi.util.Internal; |
| import org.apache.poi.util.LittleEndian; |
| |
| @Internal |
| class Array |
| { |
| static class ArrayDimension |
| { |
| static final int SIZE = 8; |
| |
| private int _indexOffset; |
| private long _size; |
| |
| ArrayDimension( byte[] data, int offset ) |
| { |
| _size = LittleEndian.getUInt( data, offset ); |
| _indexOffset = LittleEndian.getInt( data, offset |
| + LittleEndian.INT_SIZE ); |
| } |
| } |
| |
| static class ArrayHeader |
| { |
| private ArrayDimension[] _dimensions; |
| private int _type; |
| |
| ArrayHeader( byte[] data, int startOffset ) |
| { |
| int offset = startOffset; |
| |
| _type = LittleEndian.getInt( data, offset ); |
| offset += LittleEndian.INT_SIZE; |
| |
| long numDimensionsUnsigned = LittleEndian.getUInt( data, offset ); |
| offset += LittleEndian.INT_SIZE; |
| |
| if ( !( 1 <= numDimensionsUnsigned && numDimensionsUnsigned <= 31 ) ) |
| throw new IllegalPropertySetDataException( |
| "Array dimension number " + numDimensionsUnsigned |
| + " is not in [1; 31] range" ); |
| int numDimensions = (int) numDimensionsUnsigned; |
| |
| _dimensions = new ArrayDimension[numDimensions]; |
| for ( int i = 0; i < numDimensions; i++ ) |
| { |
| _dimensions[i] = new ArrayDimension( data, offset ); |
| offset += ArrayDimension.SIZE; |
| } |
| } |
| |
| long getNumberOfScalarValues() |
| { |
| long result = 1; |
| for ( ArrayDimension dimension : _dimensions ) |
| result *= dimension._size; |
| return result; |
| } |
| |
| int getSize() |
| { |
| return LittleEndian.INT_SIZE * 2 + _dimensions.length |
| * ArrayDimension.SIZE; |
| } |
| |
| int getType() |
| { |
| return _type; |
| } |
| } |
| |
| private ArrayHeader _header; |
| private TypedPropertyValue[] _values; |
| |
| Array() |
| { |
| } |
| |
| Array( final byte[] data, final int offset ) |
| { |
| read( data, offset ); |
| } |
| |
| int read( final byte[] data, final int startOffset ) |
| { |
| int offset = startOffset; |
| |
| _header = new ArrayHeader( data, offset ); |
| offset += _header.getSize(); |
| |
| long numberOfScalarsLong = _header.getNumberOfScalarValues(); |
| if ( numberOfScalarsLong > Integer.MAX_VALUE ) |
| throw new UnsupportedOperationException( |
| "Sorry, but POI can't store array of properties with size of " |
| + numberOfScalarsLong + " in memory" ); |
| int numberOfScalars = (int) numberOfScalarsLong; |
| |
| _values = new TypedPropertyValue[numberOfScalars]; |
| final int type = _header._type; |
| if ( type == Variant.VT_VARIANT ) |
| { |
| for ( int i = 0; i < numberOfScalars; i++ ) |
| { |
| TypedPropertyValue typedPropertyValue = new TypedPropertyValue(); |
| offset += typedPropertyValue.read( data, offset ); |
| } |
| } |
| else |
| { |
| for ( int i = 0; i < numberOfScalars; i++ ) |
| { |
| TypedPropertyValue typedPropertyValue = new TypedPropertyValue( |
| type, null ); |
| offset += typedPropertyValue.readValuePadded( data, offset ); |
| } |
| } |
| |
| return offset - startOffset; |
| } |
| } |