Adds logic to wrap string values in quotes in query (#13)

Signed-off-by: Sean Sundberg <[email protected]>

src/main/java/com/ibm/openpages/support/util/query/Operation.java

@@ -3,22 +3,20 @@
 import com.ibm.openpages.support.models.IObjectType;
 import com.ibm.openpages.support.models.ResultValue;
 
-import java.util.Collections;
-import java.util.List;
 import java.util.function.Function;
 
 public enum Operation {
     EQUALS("="),
-    IN("IN", inValue -> (inValue instanceof List<?>) ? inValue : Collections.singletonList(inValue));
+    IN("IN", QueryValueFormatters::formatListValue);
 
     private final String value;
-    private final Function<Object, Object> valueFormatter;
+    private final Function<Object, String> valueFormatter;
 
     Operation(String value) {
-        this(value, in -> in);
+        this(value, QueryValueFormatters::formatSimpleValue);
     }
 
-    Operation(String value, Function<Object, Object> valueFormatter) {
+    Operation(String value, Function<Object, String> valueFormatter) {
         this.value = value;
         this.valueFormatter = valueFormatter;
     }

src/main/java/com/ibm/openpages/support/util/query/QueryValueFormatters.java

@@ -0,0 +1,22 @@
+package com.ibm.openpages.support.util.query;
+
+import java.util.Collection;
+import java.util.Collections;
+import java.util.stream.Collectors;
+
+public abstract class QueryValueFormatters {
+    public static String formatListValue(Object inValue) {
+        final Collection<?> value = (inValue instanceof Collection<?>) ? (Collection<?>) inValue : Collections.singletonList(inValue);
+
+        final String valueList = value
+                .stream()
+                .map(QueryValueFormatters::formatSimpleValue)
+                .collect(Collectors.joining(","));
+
+        return "[" + valueList + "]";
+    }
+
+    public static String formatSimpleValue(Object current) {
+        return (current instanceof Number) ? current.toString() : "'" + current.toString() + "'"
+    }
+}