From 060aef301c244193ab262dac4c06f30cbfa4c76a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20Westk=C3=A4mper?= <timo.westkamper@mysema.com>
Date: Fri, 8 Oct 2010 14:43:53 +0000
Subject: [PATCH] #656847 : added stub for Hibernate XML mapping handling

---
 querydsl-jpa/pom.xml                          |   8 +-
 .../hibernate/HibernateDomainExporter.java    | 119 ++++++++++++++++++
 2 files changed, 126 insertions(+), 1 deletion(-)
 create mode 100644 querydsl-jpa/src/main/java/com/mysema/query/jpa/hibernate/HibernateDomainExporter.java

diff --git a/querydsl-jpa/pom.xml b/querydsl-jpa/pom.xml
index c0faf30dd..f3f36bd40 100644
--- a/querydsl-jpa/pom.xml
+++ b/querydsl-jpa/pom.xml
@@ -83,7 +83,13 @@
     <dependency>
       <groupId>org.slf4j</groupId>
       <artifactId>slf4j-log4j12</artifactId>
-    </dependency>    
+    </dependency>    
+	
+	<dependency>
+		<groupId>stax</groupId>
+		<artifactId>stax</artifactId>
+		<version>1.2.0</version>
+	</dependency>	
 
     <!-- test -->
 	<dependency>
diff --git a/querydsl-jpa/src/main/java/com/mysema/query/jpa/hibernate/HibernateDomainExporter.java b/querydsl-jpa/src/main/java/com/mysema/query/jpa/hibernate/HibernateDomainExporter.java
new file mode 100644
index 000000000..592b98f78
--- /dev/null
+++ b/querydsl-jpa/src/main/java/com/mysema/query/jpa/hibernate/HibernateDomainExporter.java
@@ -0,0 +1,119 @@
+package com.mysema.query.jpa.hibernate;
+
+import static javax.xml.stream.XMLStreamConstants.END_DOCUMENT;
+import static javax.xml.stream.XMLStreamConstants.END_ELEMENT;
+import static javax.xml.stream.XMLStreamConstants.START_ELEMENT;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStreamWriter;
+import java.io.Writer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+
+import org.apache.commons.io.IOUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.mysema.codegen.CodeWriter;
+import com.mysema.codegen.JavaWriter;
+import com.mysema.codegen.model.SimpleType;
+import com.mysema.query.codegen.EntityType;
+import com.mysema.query.codegen.Serializer;
+import com.mysema.query.codegen.SimpleSerializerConfig;
+
+/**
+ * @author tiwe
+ *
+ */
+public class HibernateDomainExporter {
+
+    private static final Logger logger = LoggerFactory.getLogger(HibernateDomainExporter.class);
+    
+    private final XMLInputFactory inFactory = XMLInputFactory.newInstance();
+    
+    private final String namePrefix;
+    
+    private final File targetFolder;
+    
+    private final List<EntityType> entityTypes = new ArrayList<EntityType>();
+    
+    private final List<File> hibernateXml;
+    
+    public HibernateDomainExporter(String namePrefix, File targetFolder, File... hibernateXml){
+        this.namePrefix = namePrefix;
+        this.targetFolder = targetFolder;
+        this.hibernateXml = Arrays.asList(hibernateXml);
+    }
+    
+    public void execute() throws FileNotFoundException, XMLStreamException{
+        for (File xmlFile : hibernateXml){
+            
+            InputStream in = new FileInputStream(xmlFile);
+            XMLStreamReader reader = inFactory.createXMLStreamReader(in);
+            try{
+                EntityType entityType = null;
+                while (true) {
+                    int event = reader.next();
+                    if (event == START_ELEMENT) {
+                        String name = reader.getLocalName();
+                        if (name.equals("class")){
+                            String className = reader.getAttributeValue(null, "name");
+                            String packageName = className.substring(0, className.lastIndexOf("."));
+                            String simpleName = className.substring(packageName.length());
+                            entityType = new EntityType(namePrefix, new SimpleType(className, packageName, simpleName));
+                            
+                        }else if (name.equals("property")){
+                            String propertyName = reader.getAttributeValue(null, "name");
+                            // TODO
+                        }
+                    }else if (event == END_ELEMENT){    
+                        String name = reader.getLocalName();
+                        if (name.equals("class")){
+                            entityTypes.add(entityType);
+                        }
+                    } else if (event == END_DOCUMENT) {
+                        break;
+                    }
+                }                
+            }finally{
+                IOUtils.closeQuietly(in);
+                reader.close();
+            }
+        }
+        
+        // serialize entity types
+    }
+    
+    private void write(Serializer serializer, String path, EntityType type) throws IOException {
+        File targetFile = new File(targetFolder, path);
+        Writer w = writerFor(targetFile);
+        try{
+            CodeWriter writer = new JavaWriter(w);
+            serializer.serialize(type, SimpleSerializerConfig.DEFAULT, writer);
+        }finally{
+            w.close();
+        }
+    }
+    
+    private Writer writerFor(File file) {
+        if (!file.getParentFile().exists() && !file.getParentFile().mkdirs()) {
+            logger.error("Folder " + file.getParent() + " could not be created");
+        }
+        try {
+            return new OutputStreamWriter(new FileOutputStream(file));
+        } catch (FileNotFoundException e) {
+            throw new RuntimeException(e.getMessage(), e);
+        }
+    }
+    
+}