TILESSB-24
Moved code form tiles-template to tiles-autotag-core-runtime.

git-svn-id: https://svn.apache.org/repos/asf/tiles/sandbox/trunk/tiles-autotag@912392 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/tiles-autotag-core-runtime/pom.xml b/tiles-autotag-core-runtime/pom.xml
index 52fdf32..e55ed13 100644
--- a/tiles-autotag-core-runtime/pom.xml
+++ b/tiles-autotag-core-runtime/pom.xml
@@ -10,4 +10,12 @@
   <version>1.0-SNAPSHOT</version>
   <name>Autotag - Core runtime</name>
   <description>Autotag: runtime core classes.</description>
+  <dependencies>
+  	<dependency>
+  		<groupId>org.apache.tiles</groupId>
+  		<artifactId>tiles-request</artifactId>
+  		<version>1.0-SNAPSHOT</version>
+  		<type>pom</type>
+  	</dependency>
+  </dependencies>
 </project>
\ No newline at end of file
diff --git a/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/AbstractModelBody.java b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/AbstractModelBody.java
new file mode 100644
index 0000000..6feb2d9
--- /dev/null
+++ b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/AbstractModelBody.java
@@ -0,0 +1,50 @@
+package org.apache.tiles.autotag.core.runtime;
+
+import java.io.IOException;
+import java.io.StringWriter;
+import java.io.Writer;
+
+import org.apache.tiles.autotag.core.runtime.util.NullWriter;
+
+public abstract class AbstractModelBody implements ModelBody {
+
+    private Writer defaultWriter;
+
+    public AbstractModelBody(Writer defaultWriter) {
+        this.defaultWriter = defaultWriter;
+    }
+
+    @Override
+    public void evaluate() throws IOException {
+        evaluate(defaultWriter);
+    }
+
+    @Override
+    public String evaluateAsString() throws IOException {
+        StringWriter writer = new StringWriter();
+        try {
+            evaluate(writer);
+        } finally {
+            writer.close();
+        }
+        String body = writer.toString();
+        if (body != null) {
+            body = body.replaceAll("^\\s*|\\s*$", "");
+            if (body.length() <= 0) {
+                body = null;
+            }
+        }
+        return body;
+    }
+
+    @Override
+    public void evaluateWithoutWriting() throws IOException {
+        NullWriter writer = new NullWriter();
+        try {
+            evaluate(writer);
+        } finally {
+            writer.close();
+        }
+    }
+
+}
diff --git a/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/ModelBody.java b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/ModelBody.java
new file mode 100644
index 0000000..6b5f465
--- /dev/null
+++ b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/ModelBody.java
@@ -0,0 +1,15 @@
+package org.apache.tiles.autotag.core.runtime;
+
+import java.io.IOException;
+import java.io.Writer;
+
+public interface ModelBody {
+
+    String evaluateAsString() throws IOException;
+
+    void evaluateWithoutWriting() throws IOException;
+
+    void evaluate() throws IOException;
+
+    void evaluate(Writer writer) throws IOException;
+}
diff --git a/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/util/NullWriter.java b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/util/NullWriter.java
new file mode 100644
index 0000000..508651f
--- /dev/null
+++ b/tiles-autotag-core-runtime/src/main/java/org/apache/tiles/autotag/core/runtime/util/NullWriter.java
@@ -0,0 +1,51 @@
+/*
+ * $Id$
+ *
+ * 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.apache.tiles.autotag.core.runtime.util;
+
+import java.io.Writer;
+
+/**
+ * A writer that does not write anything.
+ *
+ * @version $Rev$ $Date$
+ * @since 2.2.0
+ */
+public class NullWriter extends Writer {
+
+    /** {@inheritDoc} */
+    @Override
+    public void close() {
+        // Does nothing
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public void flush() {
+        // Does nothing
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public void write(char[] cbuf, int off, int len) {
+        // Does nothing
+    }
+}
diff --git a/tiles-autotag-core/pom.xml b/tiles-autotag-core/pom.xml
index 5b2b033..a83c864 100644
--- a/tiles-autotag-core/pom.xml
+++ b/tiles-autotag-core/pom.xml
@@ -46,5 +46,10 @@
         	<version>2.5.2</version>
         	<scope>test</scope>
         </dependency>
+        <dependency>
+        	<groupId>org.apache.tiles</groupId>
+        	<artifactId>tiles-autotag-core-runtime</artifactId>
+        	<version>1.0-SNAPSHOT</version>
+        </dependency>
     </dependencies>
 </project>