svn commit: r567469 - /ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java

Author: jleroux
Date: Sun Aug 19 14:03:35 2007
New Revision: 567469

URL: http://svn.apache.org/viewvc?rev=567469&view=rev
Log:
Put back on commiters consensus

Added:
    ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java   (with props)

Added: ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java
URL: http://svn.apache.org/viewvc/ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java?rev=567469&view=auto
==============================================================================
--- ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java (added)
+++ ofbiz/branches/release4.0/framework/base/src/base/org/ofbiz/base/util/template/FtlTransform.java Sun Aug 19 14:03:35 2007
@@ -0,0 +1,116 @@
+/*******************************************************************************
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you 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.ofbiz.base.util.template;
+
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Set;
+import java.util.Iterator;
+import java.net.URL;
+import java.net.URLConnection;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+
+import org.ofbiz.base.util.URLConnector;
+import org.ofbiz.base.util.cache.UtilCache;
+import org.ofbiz.base.location.FlexibleLocation;
+import java.io.IOException;
+import java.io.Writer;
+
+import freemarker.ext.beans.BeansWrapper;
+import freemarker.template.SimpleHash;
+import freemarker.template.Template;
+import freemarker.template.TemplateException;
+import freemarker.template.WrappingTemplateModel;
+import freemarker.template.Configuration;
+
+
+/**
+ * FtlTransform
+ *
+ * This utility takes the URL to a Freemarker template and some parameters
+ * and runs the template and writes to the writer that was passed.
+ * It keeps its own cache for storing the fetched template.
+ *
+ */
+public final class FtlTransform {
+
+    public static final String module = FtlTransform.class.getName();
+    public static UtilCache ftlTemplatesCache = new UtilCache("FtlTemplates", 0, 0);
+    private static Configuration cfg = new Configuration();
+    private static Map templateRoot = new HashMap();
+
+    static {
+        
+        WrappingTemplateModel.setDefaultObjectWrapper(BeansWrapper.getDefaultInstance());
+        try {        
+            cfg.setObjectWrapper(BeansWrapper.getDefaultInstance());
+            cfg.setSetting("datetime_format", "yyyy-MM-dd HH:mm:ss.SSS");
+        } catch (TemplateException e) {
+            throw new RuntimeException("Freemarker TemplateException", e.getCause());
+        }        
+        prepOfbizRoot(templateRoot);
+    }
+    
+    public FtlTransform() {
+    }
+
+    public static void transform(Writer writer, String path, Map params)
+        throws TemplateException, IOException {
+        
+        Template template = (Template)ftlTemplatesCache.get(path);
+        if (template == null) {
+            template = getTemplate(path);
+            if (template != null) {
+                ftlTemplatesCache.put(path, template);  
+            }
+        }
+        
+        SimpleHash templateContext = new SimpleHash();
+        templateContext.putAll(templateRoot);
+     if (params != null) {
+           Set entrySet = params.entrySet();
+           Iterator iter = entrySet.iterator();
+           while (iter.hasNext()) {
+              Map.Entry entry = (Map.Entry)iter.next();
+              String key = (String)entry.getKey();
+                Object val = entry.getValue();
+                if (val != null) {
+                    templateContext.put(key, val);
+                }
+           }
+        }
+        template.process(templateContext, writer);
+    }
+    
+    private static Template getTemplate( String inputUrl) throws IOException {
+        
+        URL url = FlexibleLocation.resolveLocation(inputUrl);
+        URLConnection conn = URLConnector.openConnection(url);
+        InputStream in = conn.getInputStream();
+        InputStreamReader rdr = new InputStreamReader(in);
+        Template template  = new Template(inputUrl, rdr, cfg);
+        template.setObjectWrapper(BeansWrapper.getDefaultInstance());
+        return template;
+    }
+    
+    public static void prepOfbizRoot(Map root) {
+        FreeMarkerWorker.addAllOfbizTransforms(root);
+    }
+}

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