[New] added a ParameterVisitor interface with SetParameterValueVisitor

src/main/java/li/strolch/model/OrderVisitor.java

@@ -15,6 +15,8 @@
  */
 package li.strolch.model;
 
+import li.strolch.model.visitor.StrolchElementVisitor;
+
 /**
  * @author Robert von Burg <eitch@eitchnet.ch>
  */

src/main/java/li/strolch/model/ResourceVisitor.java

@@ -15,6 +15,8 @@
  */
 package li.strolch.model;
 
+import li.strolch.model.visitor.StrolchElementVisitor;
+
 /**
  * @author Robert von Burg <eitch@eitchnet.ch>
  */

src/main/java/li/strolch/model/parameter/AbstractParameter.java

@@ -21,6 +21,7 @@ import li.strolch.exception.StrolchException;
 import li.strolch.model.AbstractStrolchElement;
 import li.strolch.model.Locator;
 import li.strolch.model.Locator.LocatorBuilder;
+import li.strolch.model.visitor.ParameterVisitor;
 import li.strolch.model.ParameterizedElement;
 import li.strolch.model.Tags;
 
@@ -163,12 +164,12 @@ public abstract class AbstractParameter<T> extends AbstractStrolchElement implem
 		setInterpretation(interpretation);
 		setUom(uom);
 
-		if(StringHelper.isEmpty(index)) {
+		if (StringHelper.isEmpty(index)) {
 			this.index = 0;
 		} else {
 			this.index = Integer.valueOf(index);
 		}
-		
+
 		if (StringHelper.isEmpty(hidden)) {
 			setHidden(false);
 		} else {
@@ -228,6 +229,11 @@ public abstract class AbstractParameter<T> extends AbstractStrolchElement implem
 		clone.setIndex(this.index);
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitParam(this);
+	}
+
 	@SuppressWarnings("nls")
 	@Override
 	public String toString() {

src/main/java/li/strolch/model/parameter/BooleanParameter.java

@@ -19,6 +19,7 @@ import java.text.MessageFormat;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -102,6 +103,11 @@ public class BooleanParameter extends AbstractParameter<Boolean> {
 		return clone;
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitBooleanParam(this);
+	}
+
 	public static Boolean parseFromString(String valueS) {
 		return Boolean.valueOf(valueS);
 	}

src/main/java/li/strolch/model/parameter/DateParameter.java

@@ -20,6 +20,7 @@ import java.util.Date;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -104,6 +105,11 @@ public class DateParameter extends AbstractParameter<Date> {
 		return clone;
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitDateParam(this);
+	}
+
 	public static Date parseFromString(String valueS) {
 		return ISO8601FormatFactory.getInstance().getDateFormat().parse(valueS);
 	}

src/main/java/li/strolch/model/parameter/FloatParameter.java

@@ -19,6 +19,7 @@ import java.text.MessageFormat;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -103,7 +104,12 @@ public class FloatParameter extends AbstractParameter<Double> {
 
 		return clone;
 	}
-	
+
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitFloatParam(this);
+	}
+
 	public static Double parseFromString(String valueS) {
 		return Double.valueOf(valueS);
 	}

src/main/java/li/strolch/model/parameter/IntegerParameter.java

@@ -19,6 +19,7 @@ import java.text.MessageFormat;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -103,6 +104,11 @@ public class IntegerParameter extends AbstractParameter<Integer> {
 		return clone;
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitIntegerParam(this);
+	}
+
 	public static Integer parseFromString(String valueS) {
 		return Integer.valueOf(valueS);
 	}

src/main/java/li/strolch/model/parameter/LongParameter.java

@@ -19,6 +19,7 @@ import java.text.MessageFormat;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -103,6 +104,11 @@ public class LongParameter extends AbstractParameter<Long> {
 		return clone;
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitLongParam(this);
+	}
+
 	public static Long parseFromString(String valueS) {
 		return Long.valueOf(valueS);
 	}

src/main/java/li/strolch/model/parameter/Parameter.java

@@ -19,6 +19,7 @@ import li.strolch.model.Order;
 import li.strolch.model.ParameterizedElement;
 import li.strolch.model.Resource;
 import li.strolch.model.StrolchElement;
+import li.strolch.model.visitor.ParameterVisitor;
 
 /**
  * @author Robert von Burg <eitch@eitchnet.ch>
@@ -158,4 +159,6 @@ public interface Parameter<T> extends StrolchElement {
 
 	@Override
 	public Parameter<T> getClone();
+
+	public <U> U accept(ParameterVisitor visitor);
 }

src/main/java/li/strolch/model/parameter/StringListParameter.java

@@ -24,6 +24,7 @@ import java.util.List;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -134,6 +135,11 @@ public class StringListParameter extends AbstractParameter<List<String>> impleme
 		return clone;
 	}
 
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitStringListParam(this);
+	}
+
 	public static List<String> parseFromString(String value) {
 		if (value.isEmpty())
 			return Collections.emptyList();

src/main/java/li/strolch/model/parameter/StringParameter.java

@@ -19,6 +19,7 @@ import java.text.MessageFormat;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.model.Tags;
+import li.strolch.model.visitor.ParameterVisitor;
 
 import org.w3c.dom.Element;
 
@@ -104,4 +105,9 @@ public class StringParameter extends AbstractParameter<String> {
 
 		return clone;
 	}
+
+	@Override
+	public <U> U accept(ParameterVisitor visitor) {
+		return visitor.visitStringParam(this);
+	}
 }

src/main/java/li/strolch/model/visitor/ParameterVisitor.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
+ * 
+ * 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 li.strolch.model.visitor;
+
+import li.strolch.model.parameter.BooleanParameter;
+import li.strolch.model.parameter.DateParameter;
+import li.strolch.model.parameter.FloatParameter;
+import li.strolch.model.parameter.IntegerParameter;
+import li.strolch.model.parameter.ListParameter;
+import li.strolch.model.parameter.LongParameter;
+import li.strolch.model.parameter.Parameter;
+import li.strolch.model.parameter.StringListParameter;
+import li.strolch.model.parameter.StringParameter;
+
+/**
+ * @author Robert von Burg <eitch@eitchnet.ch>
+ */
+public interface ParameterVisitor {
+
+	public <T> T visitParam(Parameter<?> param);
+
+	public <T> T visitBooleanParam(BooleanParameter param);
+
+	public <T> T visitDateParam(DateParameter param);
+
+	public <T> T visitFloatParam(FloatParameter param);
+
+	public <T> T visitIntegerParam(IntegerParameter param);
+
+	public <T> T visitLongParam(LongParameter param);
+
+	public <T> T visitStringParam(StringParameter param);
+
+	public <T> T visitListParam(ListParameter<?> param);
+
+	public <T> T visitStringListParam(StringListParameter param);
+}

src/main/java/li/strolch/model/visitor/SetParameterValueVisitor.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
+ * 
+ * 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 li.strolch.model.visitor;
+
+import li.strolch.model.parameter.BooleanParameter;
+import li.strolch.model.parameter.DateParameter;
+import li.strolch.model.parameter.FloatParameter;
+import li.strolch.model.parameter.IntegerParameter;
+import li.strolch.model.parameter.ListParameter;
+import li.strolch.model.parameter.LongParameter;
+import li.strolch.model.parameter.Parameter;
+import li.strolch.model.parameter.StringListParameter;
+import li.strolch.model.parameter.StringParameter;
+
+/**
+ * @author Robert von Burg <eitch@eitchnet.ch>
+ */
+public class SetParameterValueVisitor implements ParameterVisitor {
+
+	private String value;
+
+	public void setValue(Parameter<?> parameter, String value) {
+		this.value = value;
+		try {
+			parameter.accept(this);
+		} finally {
+			this.value = null;
+		}
+	}
+
+	@Override
+	public <T> T visitParam(Parameter<?> param) {
+		throw new UnsupportedOperationException("Not implemented on " + param.getClass());
+	}
+
+	@Override
+	public <T> T visitListParam(ListParameter<?> param) {
+		throw new UnsupportedOperationException("Not implemented on " + param.getClass());
+	}
+
+	@Override
+	public <T> T visitBooleanParam(BooleanParameter param) {
+		param.setValue(BooleanParameter.parseFromString(this.value));
+		return null;
+	}
+
+	@Override
+	public <T> T visitDateParam(DateParameter param) {
+		param.setValue(DateParameter.parseFromString(this.value));
+		return null;
+	}
+
+	@Override
+	public <T> T visitFloatParam(FloatParameter param) {
+		param.setValue(FloatParameter.parseFromString(this.value));
+		return null;
+	}
+
+	@Override
+	public <T> T visitIntegerParam(IntegerParameter param) {
+		param.setValue(IntegerParameter.parseFromString(this.value));
+		return null;
+	}
+
+	@Override
+	public <T> T visitLongParam(LongParameter param) {
+		param.setValue(LongParameter.parseFromString(this.value));
+		return null;
+	}
+
+	@Override
+	public <T> T visitStringParam(StringParameter param) {
+		param.setValue(this.value);
+		return null;
+	}
+
+	@Override
+	public <T> T visitStringListParam(StringListParameter param) {
+		param.setValue(StringListParameter.parseFromString(this.value));
+		return null;
+	}
+
+}

src/main/java/li/strolch/model/visitor/StrolchElementVisitor.java

@@ -13,7 +13,9 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package li.strolch.model;
+package li.strolch.model.visitor;
+
+import li.strolch.model.StrolchElement;
 
 /**
  * @author Robert von Burg <eitch@eitchnet.ch>