additional files from GRAILS-1702

git-svn-id: https://svn.codehaus.org/grails/trunk@5784 1cfb16fd-6d17-0410-8ff1-b7e8e1e2867d

Author: graeme

src/web/grails/converters/deep/JSON.java

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+/* Copyright 2006-2007 Graeme Rocher
+ *
+ * Licensed 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 grails.converters.deep;
+
+import org.codehaus.groovy.grails.web.converters.Converter;
+import org.codehaus.groovy.grails.web.converters.exceptions.ConverterException;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Stack;
+
+/**
+ * A converter that converts domain classes, Maps, Lists, Arrays, POJOs and POGOs
+ * to JSON (Including nested Domain Classes)
+ *
+ * @author Siegfried Puchbauer
+ */
+public class JSON extends grails.converters.JSON implements Converter {
+
+    private Stack stack = new Stack();
+
+    protected void bean(Object o) throws ConverterException {
+        if (stack.contains(o)) {
+            //value(new HashMap());//throw new ConverterException("Circular Relationship detected!");
+            handleCircularRelationship(o);
+            return;
+        }
+        stack.push(o);
+        super.bean(o);
+        stack.pop();
+    }
+
+    protected void domain(Object o) throws ConverterException {
+        if (stack.contains(o)) {
+            //value(new HashMap());//throw new ConverterException("Circular Relationship detected!");
+            handleCircularRelationship(o);
+            return;
+        }
+        stack.push(o);
+        super.domain(o);
+        stack.pop();
+    }
+
+    protected void handleCircularRelationship(Object o) throws ConverterException {
+        Map props = new HashMap();
+        props.put("class", o.getClass());
+        StringBuffer ref = new StringBuffer();
+        int idx = stack.indexOf(o);
+        for (int i = stack.size(); i > idx; i--) {
+            ref.append("../");
+        }
+        props.put("_ref", ref.substring(0, ref.length() - 1));
+        value(props);
+    }
+
+    /**
+     * internal Getter
+     *
+     * @return true
+     */
+    public boolean isRenderDomainClassRelations() {
+        return true;
+    }
+}

src/web/grails/converters/deep/XML.java

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+/* Copyright 2006-2007 Graeme Rocher
+ *
+ * Licensed 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 grails.converters.deep;
+
+import com.thoughtworks.xstream.XStream;
+import org.codehaus.groovy.grails.web.converters.Converter;
+import org.codehaus.groovy.grails.web.converters.xtream.DomainClassConverter;
+
+/**
+ * A converter that converts domain classes to XML (including nested Domain Classes)
+ *
+ * @author Siegfried Puchbauer
+ */
+public class XML extends grails.converters.XML implements Converter {
+
+    /**
+     * Configures the XStream instance
+     *
+     * @param xs an XStream instance
+     */
+    public void configureXStream(XStream xs) {
+        DomainClassConverter dcConverter = new DomainClassConverter();
+        dcConverter.setRenderDomainClassRelations(true);
+        xs.registerConverter(dcConverter);
+    }
+
+}