X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Futil%2FSingleSessionFileProvider.java;fp=org.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Futil%2FSingleSessionFileProvider.java;h=291d579acaafb8c42900455870fa7948fb46d405;hb=d169026cb1939009fd90ac46a11f480cb3d803c0;hp=0000000000000000000000000000000000000000;hpb=a1e5c8447beec2b896b0a03e38a4c17608a4b85d;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/util/SingleSessionFileProvider.java b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/util/SingleSessionFileProvider.java
new file mode 100644
index 000000000..291d579ac
--- /dev/null
+++ b/org.argeo.cms.ui/src/org/argeo/eclipse/ui/jcr/util/SingleSessionFileProvider.java
@@ -0,0 +1,98 @@
+package org.argeo.eclipse.ui.jcr.util;
+
+import java.io.InputStream;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.nodetype.NodeType;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.eclipse.ui.EclipseUiException;
+import org.argeo.eclipse.ui.FileProvider;
+
+/**
+ * Implements a FileProvider for UI purposes. Unlike the
+ * <code> JcrFileProvider </code>, it relies on a single session and manages
+ * nodes with path only.
+ * 
+ * Note that considered id is the JCR path
+ * 
+ * Relies on common approach for JCR file handling implementation.
+ */
+@SuppressWarnings("deprecation")
+public class SingleSessionFileProvider implements FileProvider {
+
+	private Session session;
+
+	public SingleSessionFileProvider(Session session) {
+		this.session = session;
+	}
+
+	public byte[] getByteArrayFileFromId(String fileId) {
+		InputStream fis = null;
+		byte[] ba = null;
+		Node child = getFileNodeFromId(fileId);
+		try {
+			fis = (InputStream) child.getProperty(Property.JCR_DATA)
+					.getBinary().getStream();
+			ba = IOUtils.toByteArray(fis);
+
+		} catch (Exception e) {
+			throw new EclipseUiException("Stream error while opening file", e);
+		} finally {
+			IOUtils.closeQuietly(fis);
+		}
+		return ba;
+	}
+
+	public InputStream getInputStreamFromFileId(String fileId) {
+		try {
+			InputStream fis = null;
+
+			Node child = getFileNodeFromId(fileId);
+			fis = (InputStream) child.getProperty(Property.JCR_DATA)
+					.getBinary().getStream();
+			return fis;
+		} catch (RepositoryException re) {
+			throw new EclipseUiException("Cannot get stream from file node for Id "
+					+ fileId, re);
+		}
+	}
+
+	/**
+	 * 
+	 * @param fileId
+	 * @return Returns the child node of the nt:file node. It is the child node
+	 *         that have the jcr:data property where actual file is stored.
+	 *         never null
+	 */
+	private Node getFileNodeFromId(String fileId) {
+		try {
+			Node result = null;
+			result = session.getNode(fileId);
+
+			// Sanity checks
+			if (result == null)
+				throw new EclipseUiException("File node not found for ID" + fileId);
+
+			// Ensure that the node have the correct type.
+			if (!result.isNodeType(NodeType.NT_FILE))
+				throw new EclipseUiException(
+						"Cannot open file children Node that are not of "
+								+ NodeType.NT_RESOURCE + " type.");
+
+			Node child = result.getNodes().nextNode();
+			if (child == null || !child.isNodeType(NodeType.NT_RESOURCE))
+				throw new EclipseUiException(
+						"ERROR: IN the current implemented model, "
+								+ NodeType.NT_FILE
+								+ "  file node must have one and only one child of the nt:ressource, where actual data is stored");
+			return child;
+		} catch (RepositoryException re) {
+			throw new EclipseUiException("Erreur while getting file node of ID "
+					+ fileId, re);
+		}
+	}
+}