[New] Added ListParameter.getValue(int) and streamValues()

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

@@ -6,6 +6,7 @@ import java.text.MessageFormat;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.List;
+import java.util.stream.Stream;
 
 import li.strolch.exception.StrolchException;
 import li.strolch.utils.helper.StringHelper;
@@ -90,6 +91,16 @@ public abstract class AbstractListParameter<E> extends AbstractParameter<List<E>
 		return new ArrayList<>(this.value);
 	}
 
+	@Override
+	public E getValue(int index) {
+		return this.value.get(index);
+	}
+
+	@Override
+	public Stream<E> streamValues() {
+		return this.value.stream();
+	}
+
 	@Override
 	public void setValue(List<E> values) {
 		assertNotReadonly();

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

@@ -17,6 +17,7 @@ package li.strolch.model.parameter;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.stream.Stream;
 
 /**
  * A {@link Parameter} which supports a list of elements.
@@ -28,6 +29,23 @@ public interface ListParameter<E> extends Parameter<List<E>> {
 	String VALUE_SEPARATOR1 = ";"; //$NON-NLS-1$
 	String VALUE_SEPARATOR2 = ","; //$NON-NLS-1$
 
+	/**
+	 * Returns the value at the given index of this {@link ListParameter}'s value
+	 *
+	 * @param index
+	 * 		the index from which to return the value
+	 *
+	 * @return the value at the given index
+	 */
+	E getValue(int index);
+
+	/**
+	 * Returns a {@link Stream} for the values of this list
+	 *
+	 * @return a stream for the values
+	 */
+	Stream<E> streamValues();
+
 	/**
 	 * Set the internal value to have the content of the collection
 	 *