Added helper methods to StringFilter

core/src/main/java/org/genesys/blocks/model/filters/StringFilter.java

@@ -16,6 +16,7 @@
 package org.genesys.blocks.model.filters;
 
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;
 
@@ -67,17 +68,64 @@ public class StringFilter {
 	}
 
 	/**
-	 * Eq.
+	 * Equals.
 	 *
 	 * @param val the val
 	 * @return the string filter
+	 *
+	 * @deprecated Use {@link #eq(String[])}
 	 */
-	public static StringFilter eq(final String... val) {
+	public static StringFilter equals(final String... val) {
 		final StringFilter filter = new StringFilter();
 		filter.eq = Sets.newHashSet(val);
 		return filter;
 	}
 
+	/**
+	 * Eq.
+	 *
+	 * @param val the val
+	 * @return the string filter
+	 */
+	public StringFilter eq(final String... val) {
+		if (eq != null && !eq.isEmpty()) {
+			eq.addAll(Arrays.asList(val));
+		} else {
+			eq = Sets.newHashSet(val);
+		}
+		return this;
+	}
+
+	/**
+	 * Contains.
+	 *
+	 * @param val the val
+	 * @return the string filter
+	 */
+	public StringFilter contains(final String... val) {
+		if (contains != null && !contains.isEmpty()) {
+			contains.addAll(Arrays.asList(val));
+		} else {
+			contains = Sets.newHashSet(val);
+		}
+		return this;
+	}
+
+	/**
+	 * Sw.
+	 *
+	 * @param val the val
+	 * @return the string filter
+	 */
+	public StringFilter sw(final String... val) {
+		if (sw != null && !sw.isEmpty()) {
+			sw.addAll(Arrays.asList(val));
+		} else {
+			sw = Sets.newHashSet(val);
+		}
+		return this;
+	}
+
 	static class SetDeserializer extends JsonDeserializer<Set<String>> {
 		@Override
 		public Set<String> deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {