Introduce JCR subtree export to simple xml.

[lgpl/argeo-commons.git] / org.argeo.jcr / src / org / argeo / jcr / JcrUtils.java

diff --git a/org.argeo.jcr/src/org/argeo/jcr/JcrUtils.java b/org.argeo.jcr/src/org/argeo/jcr/JcrUtils.java
index cb9fe6e471797a9289a7ff945c53d4530221ff33..3be8be184b25f269d581d09f2bf541980883143d 100644 (file)
--- a/org.argeo.jcr/src/org/argeo/jcr/JcrUtils.java
+++ b/org.argeo.jcr/src/org/argeo/jcr/JcrUtils.java
@@ -6,10 +6,13 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.PipedInputStream;
 import java.io.PipedOutputStream;
 import java.net.MalformedURLException;
 import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
 import java.security.Principal;
@@ -35,6 +38,7 @@ import javax.jcr.Node;
 import javax.jcr.NodeIterator;
 import javax.jcr.Property;
 import javax.jcr.PropertyIterator;
+import javax.jcr.PropertyType;
 import javax.jcr.Repository;
 import javax.jcr.RepositoryException;
 import javax.jcr.Session;
@@ -1577,6 +1581,7 @@ public class JcrUtils {
         * 
         * @return the created file node
         */
+       @Deprecated
        public static Node copyFile(Node folderNode, File file) {
                try (InputStream in = new FileInputStream(file)) {
                        return copyStreamAsFile(folderNode, file.getName(), in);
@@ -1648,6 +1653,28 @@ public class JcrUtils {
                // TODO remove properties if args are null?
        }
 
+       public static void copyFilesToFs(Node baseNode, Path targetDir, boolean recursive) {
+               try {
+                       Files.createDirectories(targetDir);
+                       for (NodeIterator nit = baseNode.getNodes(); nit.hasNext();) {
+                               Node node = nit.nextNode();
+                               if (node.isNodeType(NodeType.NT_FILE)) {
+                                       Path filePath = targetDir.resolve(node.getName());
+                                       try (OutputStream out = Files.newOutputStream(filePath); InputStream in = getFileAsStream(node)) {
+                                               IOUtils.copy(in, out);
+                                       }
+                               } else if (recursive && node.isNodeType(NodeType.NT_FOLDER)) {
+                                       Path dirPath = targetDir.resolve(node.getName());
+                                       copyFilesToFs(node, dirPath, true);
+                               }
+                       }
+               } catch (RepositoryException e) {
+                       throw new JcrException("Cannot copy " + baseNode + " to " + targetDir, e);
+               } catch (IOException e) {
+                       throw new RuntimeException("Cannot copy " + baseNode + " to " + targetDir, e);
+               }
+       }
+
        /**
         * Computes the checksum of an nt:file.
         * 
@@ -1703,4 +1730,49 @@ public class JcrUtils {
                return new String(hexChars);
        }
 
+       /** Export a subtree as a compact XML without namespaces. */
+       public static void toSimpleXml(Node node, StringBuilder sb) throws RepositoryException {
+               sb.append('<');
+               String nodeName = node.getName();
+               int colIndex = nodeName.indexOf(':');
+               if (colIndex > 0) {
+                       nodeName = nodeName.substring(colIndex + 1);
+               }
+               sb.append(nodeName);
+               PropertyIterator pit = node.getProperties();
+               properties: while (pit.hasNext()) {
+                       Property p = pit.nextProperty();
+                       // skip multiple properties
+                       if (p.isMultiple())
+                               continue properties;
+                       String propertyName = p.getName();
+                       int pcolIndex = propertyName.indexOf(':');
+                       // skip properties with namespaces
+                       if (pcolIndex > 0)
+                               continue properties;
+                       // skip binaries
+                       if (p.getType() == PropertyType.BINARY) {
+                               continue properties;
+                               // TODO retrieve identifier?
+                       }
+                       sb.append(' ');
+                       sb.append(propertyName);
+                       sb.append('=');
+                       sb.append('\"').append(p.getString()).append('\"');
+               }
+
+               if (node.hasNodes()) {
+                       sb.append('>');
+                       NodeIterator children = node.getNodes();
+                       while (children.hasNext()) {
+                               toSimpleXml(children.nextNode(), sb);
+                       }
+                       sb.append("</");
+                       sb.append(nodeName);
+                       sb.append('>');
+               } else {
+                       sb.append("/>");
+               }
+       }
+
 }