added relation for XSLF charts

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1384730 13f79535-47bb-0310-9956-ffa450edef68

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFChart.java

@@ -0,0 +1,110 @@
+/*
+ *  ====================================================================
+ *    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.xslf.usermodel;
+
+import org.apache.poi.POIXMLDocumentPart;
+import org.apache.poi.openxml4j.opc.PackagePart;
+import org.apache.poi.openxml4j.opc.PackageRelationship;
+import org.apache.poi.util.Beta;
+import org.apache.poi.util.Internal;
+import org.apache.xmlbeans.XmlException;
+import org.apache.xmlbeans.XmlOptions;
+import org.openxmlformats.schemas.drawingml.x2006.chart.CTChart;
+import org.openxmlformats.schemas.drawingml.x2006.chart.CTChartSpace;
+import org.openxmlformats.schemas.drawingml.x2006.chart.ChartSpaceDocument;
+
+import javax.xml.namespace.QName;
+import java.io.IOException;
+import java.io.OutputStream;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Represents a Chart in a .pptx presentation
+ *
+ *
+ */
+@Beta
+public final class XSLFChart extends POIXMLDocumentPart {
+
+	/**
+	 * Root element of the Chart part
+	 */
+	private CTChartSpace chartSpace;
+
+    /**
+	 * The Chart within that
+	 */
+	private CTChart chart;
+
+	/**
+	 * Construct a chart from a package part.
+	 *
+	 * @param part the package part holding the chart data,
+	 * the content type must be <code>application/vnd.openxmlformats-officedocument.drawingml.chart+xml</code>
+	 * @param rel  the package relationship holding this chart,
+	 * the relationship type must be http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart
+	 */
+	protected XSLFChart(PackagePart part, PackageRelationship rel) throws IOException, XmlException {
+		super(part, rel);
+
+		chartSpace = ChartSpaceDocument.Factory.parse(part.getInputStream()).getChartSpace(); 
+		chart = chartSpace.getChart();
+	}
+
+	/**
+	 * Return the underlying CTChartSpace bean, the root element of the Chart part.
+	 *
+	 * @return the underlying CTChartSpace bean
+	 */
+	@Internal
+	public CTChartSpace getCTChartSpace(){
+		return chartSpace;
+	}
+
+	/**
+	 * Return the underlying CTChart bean, within the Chart Space
+	 *
+	 * @return the underlying CTChart bean
+	 */
+	@Internal
+	public CTChart getCTChart(){
+		return chart;
+	}
+
+	@Override
+	protected void commit() throws IOException {
+		XmlOptions xmlOptions = new XmlOptions(DEFAULT_XML_OPTIONS);
+
+		xmlOptions.setSaveSyntheticDocumentElement(new QName(CTChartSpace.type.getName().getNamespaceURI(), "chartSpace", "c"));
+		Map<String, String> map = new HashMap<String, String>();
+		map.put("http://schemas.openxmlformats.org/drawingml/2006/main", "a");
+		map.put("http://schemas.openxmlformats.org/drawingml/2006/chart", "c");
+		map.put("http://schemas.openxmlformats.org/officeDocument/2006/relationships", "r");
+		xmlOptions.setSaveSuggestedPrefixes(map);
+
+		PackagePart part = getPackagePart();
+		OutputStream out = part.getOutputStream();
+		chartSpace.save(out, xmlOptions);
+		out.close();
+	}
+
+
+}

src/ooxml/java/org/apache/poi/xslf/usermodel/XSLFRelation.java

@@ -140,6 +140,13 @@ public class XSLFRelation extends POIXMLRelation {
          null
    );
 
+    public static final XSLFRelation CHART = new XSLFRelation(
+            "application/vnd.openxmlformats-officedocument.drawingml.chart+xml",
+            "http://schemas.openxmlformats.org/officeDocument/2006/relationships/chart",
+            "/ppt/charts/chart#.xml",
+            XSLFChart.class
+    );
+
     public static final XSLFRelation IMAGE_EMF = new XSLFRelation(
           "image/x-emf",
           "http://schemas.openxmlformats.org/officeDocument/2006/relationships/image",