[Cdk-commits] SF.net SVN: cdk: [6313] trunk/cdk/src/org/openscience/cdk/io/WriterFactory.java

[<eg...@us...>]

Revision: 6313
Author:   egonw
Date:     2006-05-25 06:41:38 -0700 (Thu, 25 May 2006)
ViewCVS:  http://svn.sourceforge.net/cdk/?rev=6313&view=rev

Log Message:
-----------
Added the requested WriterFactory (implements #1473698).

Added Paths:
-----------
    trunk/cdk/src/org/openscience/cdk/io/WriterFactory.java
Added: trunk/cdk/src/org/openscience/cdk/io/WriterFactory.java
===================================================================
--- trunk/cdk/src/org/openscience/cdk/io/WriterFactory.java	                        (rev 0)
+++ trunk/cdk/src/org/openscience/cdk/io/WriterFactory.java	2006-05-25 13:41:38 UTC (rev 6313)
@@ -0,0 +1,121 @@
+/* $RCSfile$
+ * $Author: egonw $
+ * $Date: 2006-05-09 21:32:32 +0200 (Tue, 09 May 2006) $  
+ * $Revision: 6204 $
+ *
+ * Copyright (C) 1997-2006  The Chemistry Development Kit (CDK) project
+ *
+ * Contact: cdk...@li...
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * as published by the Free Software Foundation; either version 2.1
+ * of the License, or (at your option) any later version.
+ * All we ask is that proper credit is given for our work, which includes
+ * - but is not limited to - adding the above copyright notice to the beginning
+ * of your source code files, and to any copyright notice that you may distribute
+ * with programs based on this work.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+package org.openscience.cdk.io;
+
+import java.io.BufferedReader;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+import org.openscience.cdk.io.formats.IChemFormat;
+import org.openscience.cdk.io.formats.IResourceFormat;
+import org.openscience.cdk.tools.LoggingTool;
+
+/**
+ * Helper tool to create IChemObjectWriters.
+ * 
+ * @author Egon Willighagen <ewi...@un...>
+ * @cdk.module io
+ **/
+public class WriterFactory {
+
+    private final static String IO_FORMATS_LIST = "io-formats.set";
+
+    private LoggingTool logger;
+
+    private static List formats = null;
+
+    /**
+     * Constructs a ChemObjectIOInstantionTests.
+     */
+    public WriterFactory() {
+    	logger = new LoggingTool(this);
+    }
+
+    /**
+     * Finds IChemFormats that provide a container for serialization for the
+     * given features. The syntax of the integer is explained in the DataFeatures class.
+     * 
+     * @param  features the data features for which a IChemFormat is searched
+     * @return          an array of IChemFormat's that can contain the given features
+     * 
+     * @see    org.openscience.cdk.tools.DataFeatures
+     */
+    public IChemFormat[] findChemFormats(int features) {
+    	if (formats == null) loadFormats();
+    	
+    	Iterator iter = formats.iterator();
+    	List matches = new ArrayList();
+    	while (iter.hasNext()) {
+    		IChemFormat format = (IChemFormat)iter.next();
+    		if ((format.getSupportedDataFeatures() & features) == features) matches.add(format);
+    	}
+    	
+    	return (IChemFormat[])matches.toArray();
+    }
+    
+    private void loadFormats() {
+        if (formats == null) {
+            formats = new ArrayList();
+            try {
+                logger.debug("Starting loading Formats...");
+                BufferedReader reader = new BufferedReader(new InputStreamReader(
+                    this.getClass().getClassLoader().getResourceAsStream(IO_FORMATS_LIST)
+                ));
+                int formatCount = 0;
+                while (reader.ready()) {
+                    // load them one by one
+                    String formatName = reader.readLine();
+                    formatCount++;
+                    try {
+                        IResourceFormat format = (IResourceFormat)this.getClass().getClassLoader().
+                            loadClass(formatName).newInstance();
+                        if (format instanceof IChemFormat) {
+                        	formats.add(format);
+                        	logger.info("Loaded IChemFormat: " + format.getClass().getName());
+                        }
+                    } catch (ClassNotFoundException exception) {
+                        logger.error("Could not find this IResourceFormat: ", formatName);
+                        logger.debug(exception);
+                    } catch (Exception exception) {
+                        logger.error("Could not load this IResourceFormat: ", formatName);
+                        logger.debug(exception);
+                    }
+                }
+                logger.info("Number of loaded formats used in detection: ", formatCount);
+            } catch (Exception exception) {
+                logger.error("Could not load this io format list: ", IO_FORMATS_LIST);
+                logger.debug(exception);
+            }
+        }
+    }
+    
+}
+


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