server/runtime/org.argeo.server.jcr/src/main/java/org/argeo/jcr/tabular/JcrTabularWriter.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.jcr.tabular;
  17
  18 import java.io.ByteArrayInputStream;
  19 import java.io.ByteArrayOutputStream;
  20 import java.io.InputStream;
  21 import java.util.List;
  22
  23 import javax.jcr.Binary;
  24 import javax.jcr.Node;
  25 import javax.jcr.Property;
  26 import javax.jcr.PropertyType;
  27 import javax.jcr.RepositoryException;
  28
  29 import org.apache.commons.io.IOUtils;
  30 import org.argeo.ArgeoException;
  31 import org.argeo.jcr.ArgeoTypes;
  32 import org.argeo.jcr.JcrUtils;
  33 import org.argeo.util.CsvWriter;
  34 import org.argeo.util.tabular.TabularColumn;
  35 import org.argeo.util.tabular.TabularWriter;
  36
  37 /** Write / reference tabular content in a JCR repository. */
  38 public class JcrTabularWriter implements TabularWriter {
  39         private Node contentNode;
  40         private ByteArrayOutputStream out;
  41         private CsvWriter csvWriter;
  42         private final List<TabularColumn> columns;
  43
  44         /** Creates a table node */
  45         public JcrTabularWriter(Node tableNode, List<TabularColumn> columns,
  46                         String contentNodeType) {
  47                 try {
  48                         this.columns = columns;
  49                         for (TabularColumn column : columns) {
  50                                 String normalized = JcrUtils.replaceInvalidChars(column
  51                                                 .getName());
  52                                 Node columnNode = tableNode.addNode(normalized,
  53                                                 ArgeoTypes.ARGEO_COLUMN);
  54                                 columnNode.setProperty(Property.JCR_TITLE, column.getName());
  55                                 if (column.getType() != null)
  56                                         columnNode.setProperty(Property.JCR_REQUIRED_TYPE,
  57                                                         PropertyType.nameFromValue(column.getType()));
  58                                 else
  59                                         columnNode.setProperty(Property.JCR_REQUIRED_TYPE,
  60                                                         PropertyType.TYPENAME_STRING);
  61                         }
  62                         contentNode = tableNode.addNode(Property.JCR_CONTENT,
  63                                         contentNodeType);
  64                         if (contentNodeType.equals(ArgeoTypes.ARGEO_CSV)) {
  65                                 contentNode.setProperty(Property.JCR_MIMETYPE, "text/csv");
  66                                 contentNode.setProperty(Property.JCR_ENCODING, "UTF-8");
  67                                 out = new ByteArrayOutputStream();
  68                                 csvWriter = new CsvWriter(out);
  69                         }
  70                 } catch (RepositoryException e) {
  71                         throw new ArgeoException("Cannot create table node " + tableNode, e);
  72                 }
  73         }
  74
  75         public void appendRow(Object[] row) {
  76                 csvWriter.writeLine(row);
  77         }
  78
  79         public void close() {
  80                 Binary binary = null;
  81                 InputStream in = null;
  82                 try {
  83                         // TODO parallelize with pipes and writing from another thread
  84                         in = new ByteArrayInputStream(out.toByteArray());
  85                         binary = contentNode.getSession().getValueFactory()
  86                                         .createBinary(in);
  87                         contentNode.setProperty(Property.JCR_DATA, binary);
  88                 } catch (RepositoryException e) {
  89                         throw new ArgeoException("Cannot store data in " + contentNode, e);
  90                 } finally {
  91                         IOUtils.closeQuietly(in);
  92                         JcrUtils.closeQuietly(binary);
  93                 }
  94         }
  95 }