renders images and ifo to pdf doc

added xml reader for external graphics


git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@194696 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 98 insertions, 0 deletions

diff --git a/src/org/apache/fop/image/analyser/XMLReader.java b/src/org/apache/fop/image/analyser/XMLReader.java
new file mode 100644
index 000000000..ab66be981
--- /dev/null
+++ b/src/org/apache/fop/image/analyser/XMLReader.java
@@ -0,0 +1,98 @@
+/*
+ * $Id$
+ * Copyright (C) 2001 The Apache Software Foundation. All rights reserved.
+ * For details on use and redistribution please refer to the
+ * LICENSE file included with these sources.
+ */
+
+package org.apache.fop.image.analyser;
+
+// Java
+import java.io.BufferedInputStream;
+import java.io.IOException;
+
+import org.xml.sax.InputSource;
+import javax.xml.parsers.DocumentBuilderFactory;
+
+import org.w3c.dom.*;
+import org.w3c.dom.DOMImplementation;
+
+import java.io.File;
+import java.net.URL;
+import java.util.HashMap;
+
+import org.apache.fop.image.FopImage;
+import org.apache.fop.fo.FOUserAgent;
+import org.apache.fop.image.XMLImage;
+
+/**
+ * ImageReader object for XML document image type.
+ */
+public class XMLReader implements ImageReader {
+    private static HashMap converters = new HashMap();
+
+    public static void setConverter(String ns, Converter conv) {
+        converters.put(ns, conv);
+    }
+
+    public XMLReader() {
+    }
+
+    public FopImage.ImageInfo verifySignature(String uri, BufferedInputStream fis,
+                                   FOUserAgent ua) throws IOException {
+        return loadImage(uri, fis, ua);
+    }
+
+    public String getMimeType() {
+        return "text/xml";
+    }
+
+    /**
+     * This means the external svg document will be loaded twice.
+     * Possibly need a slightly different design for the image stuff.
+     */
+    protected FopImage.ImageInfo loadImage(String uri, BufferedInputStream fis,
+                                   FOUserAgent ua) {
+        return createDocument(fis, ua);
+    }
+
+    public FopImage.ImageInfo createDocument(BufferedInputStream is, FOUserAgent ua) {
+        Document doc = null;
+        FopImage.ImageInfo info = new FopImage.ImageInfo();
+        info.mimeType = getMimeType();
+
+        try {
+            int length = is.available();
+            is.mark(length);
+
+            DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
+            doc = dbf.newDocumentBuilder().parse(is);
+            info.data = doc;
+
+            Element root = doc.getDocumentElement();
+            ua.getLogger().debug("ns:" + root.getAttribute("xmlns"));
+            String ns = root.getAttribute("xmlns");
+            info.str = ns;
+
+            Converter conv = (Converter)converters.get(ns);
+            if(conv != null) {
+                FopImage.ImageInfo i = conv.convert(doc);
+                if(i != null) {
+                    info = i;
+                }
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            try {
+                is.reset();
+            } catch (IOException ioe) { }
+            return null;
+        }
+        return info;
+    }
+
+    public static interface Converter {
+        public FopImage.ImageInfo convert(Document doc);
+    }
+}
+