X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=org.argeo.eclipse.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Futil%2FJcrFileProvider.java;fp=org.argeo.eclipse.ui%2Fsrc%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2Futil%2FJcrFileProvider.java;h=88006ff9395bfd909ebc7c98ba818688e098f574;hb=5b3108fe285bca50565b58b63fa4feddc96c0765;hp=0000000000000000000000000000000000000000;hpb=e54c6091d38b6859dec42f36e7334da19e2a0227;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/util/JcrFileProvider.java b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/util/JcrFileProvider.java
new file mode 100644
index 000000000..88006ff93
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/util/JcrFileProvider.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.eclipse.ui.jcr.util;
+
+import java.io.InputStream;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+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. Note that it might not be very
+ * reliable as long as we have not fixed login and multi repository issues that
+ * will be addressed in the next version.
+ * 
+ * NOTE: id used here is the real id of the JCR Node, not the JCR Path
+ * 
+ * Relies on common approach for JCR file handling implementation.
+ * 
+ */
+@SuppressWarnings("deprecation")
+public class JcrFileProvider implements FileProvider {
+
+	// private Object[] rootNodes;
+	private Node refNode;
+
+	/**
+	 * Must be set in order for the provider to be able to get current session
+	 * and thus have the ability to get the file node corresponding to a given
+	 * file ID
+	 * 
+	 * @param refNode
+	 */
+	public void setReferenceNode(Node refNode) {
+		// FIXME : this introduces some concurrency ISSUES.
+		this.refNode = refNode;
+	}
+
+	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);
+		}
+	}
+
+	/**
+	 * Throws an exception if the node is not found in the current repository (a
+	 * bit like a FileNotFoundException)
+	 * 
+	 * @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 = refNode.getSession().getNodeByIdentifier(fileId);
+
+			// rootNodes: for (int j = 0; j < rootNodes.length; j++) {
+			// // in case we have a classic JCR Node
+			// if (rootNodes[j] instanceof Node) {
+			// Node curNode = (Node) rootNodes[j];
+			// if (result != null)
+			// break rootNodes;
+			// } // Case of a repository Node
+			// else if (rootNodes[j] instanceof RepositoryNode) {
+			// Object[] nodes = ((RepositoryNode) rootNodes[j])
+			// .getChildren();
+			// for (int i = 0; i < nodes.length; i++) {
+			// Node node = (Node) nodes[i];
+			// result = node.getSession().getNodeByIdentifier(fileId);
+			// if (result != null)
+			// break rootNodes;
+			// }
+			// }
+			// }
+
+			// Sanity checks
+			if (result == null)
+				throw new EclipseUiException("File node not found for ID" + fileId);
+
+			Node child = null;
+
+			boolean isValid = true;
+			if (!result.isNodeType(NodeType.NT_FILE))
+				// useless: mandatory child node
+				// || !result.hasNode(Property.JCR_CONTENT))
+				isValid = false;
+			else {
+				child = result.getNode(Property.JCR_CONTENT);
+				if (!(child.isNodeType(NodeType.NT_RESOURCE) || child.hasProperty(Property.JCR_DATA)))
+					isValid = false;
+			}
+
+			if (!isValid)
+				throw new EclipseUiException("ERROR: In the current implemented model, '" + NodeType.NT_FILE
+						+ "' file node must have a child node named jcr:content "
+						+ "that has a BINARY Property named jcr:data " + "where the actual data is stored");
+			return child;
+
+		} catch (RepositoryException re) {
+			throw new EclipseUiException("Erreur while getting file node of ID " + fileId, re);
+		}
+	}
+}