123 lines
4.5 KiB
Java
123 lines
4.5 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.xssf.usermodel;
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import java.io.IOException;
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import org.apache.poi.ss.usermodel.PictureData;
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import org.apache.poi.ss.usermodel.Workbook;
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import org.apache.poi.util.IOUtils;
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import org.apache.poi.POIXMLDocumentPart;
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import org.apache.poi.POIXMLException;
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import org.apache.poi.POIXMLRelation;
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import org.apache.poi.openxml4j.opc.PackagePart;
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import org.apache.poi.openxml4j.opc.PackageRelationship;
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/**
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* Raw picture data, normally attached to a SpreadsheetML Drawing.
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* As a rule, pictures are stored in the /xl/media/ part of a SpreadsheetML package.
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*/
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public class XSSFPictureData extends POIXMLDocumentPart implements PictureData {
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/**
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* Relationships for each known picture type
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*/
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protected static final POIXMLRelation[] RELATIONS;
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static {
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RELATIONS = new POIXMLRelation[8];
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RELATIONS[Workbook.PICTURE_TYPE_EMF] = XSSFRelation.IMAGE_EMF;
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RELATIONS[Workbook.PICTURE_TYPE_WMF] = XSSFRelation.IMAGE_WMF;
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RELATIONS[Workbook.PICTURE_TYPE_PICT] = XSSFRelation.IMAGE_PICT;
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RELATIONS[Workbook.PICTURE_TYPE_JPEG] = XSSFRelation.IMAGE_JPEG;
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RELATIONS[Workbook.PICTURE_TYPE_PNG] = XSSFRelation.IMAGE_PNG;
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RELATIONS[Workbook.PICTURE_TYPE_DIB] = XSSFRelation.IMAGE_DIB;
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}
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/**
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* Create a new XSSFPictureData node
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*
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* @see org.apache.poi.xssf.usermodel.XSSFWorkbook#addPicture(byte[], int)
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*/
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protected XSSFPictureData() {
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super();
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}
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/**
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* Construct XSSFPictureData from a package part
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*
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* @param part the package part holding the drawing data,
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* @param rel the package relationship holding this drawing,
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* the relationship type must be http://schemas.openxmlformats.org/officeDocument/2006/relationships/image
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*/
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protected XSSFPictureData(PackagePart part, PackageRelationship rel) {
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super(part, rel);
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}
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/**
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* Gets the picture data as a byte array.
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* <p>
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* Note, that this call might be expensive since all the picture data is copied into a temporary byte array.
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* You can grab the picture data directly from the underlying package part as follows:
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* <br/>
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* <code>
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* InputStream is = getPackagePart().getInputStream();
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* </code>
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* </p>
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*
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* @return the picture data.
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*/
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public byte[] getData() {
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try {
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return IOUtils.toByteArray(getPackagePart().getInputStream());
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} catch(IOException e) {
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throw new POIXMLException(e);
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}
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}
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/**
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* Suggests a file extension for this image.
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*
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* @return the file extension.
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*/
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public String suggestFileExtension() {
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return getPackagePart().getPartName().getExtension();
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}
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/**
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* Return an integer constant that specifies type of this picture
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*
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* @return an integer constant that specifies type of this picture
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_EMF
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_WMF
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_PICT
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_JPEG
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_PNG
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* @see org.apache.poi.ss.usermodel.Workbook#PICTURE_TYPE_DIB
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*/
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public int getPictureType(){
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String contentType = getPackagePart().getContentType();
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for (int i = 0; i < RELATIONS.length; i++) {
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if(RELATIONS[i] == null) continue;
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if(RELATIONS[i].getContentType().equals(contentType)){
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return i;
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}
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}
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return 0;
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}
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}
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