Attempt to fix deserialization

Author: Kaycell

.generator/src/generator/templates/modelOneOf.j2

@@ -75,6 +75,11 @@ public class {{ name }} extends AbstractOpenApiSchema {
             try {
                 boolean attemptParsing = true;
                 // ensure that we respect type coercion as set on the client ObjectMapper
+                {%- if unParameterizedDataType == "List" %}
+                if (token != JsonToken.START_ARRAY) {
+                    attemptParsing = false;
+                }
+                {%- else %}
                 if ({{ unParameterizedDataType }}.class.equals(Integer.class) || {{ unParameterizedDataType }}.class.equals(Long.class) || {{ unParameterizedDataType }}.class.equals(Float.class) || {{ unParameterizedDataType }}.class.equals(Double.class) || {{ unParameterizedDataType }}.class.equals(Boolean.class) || {{ unParameterizedDataType }}.class.equals(String.class)) {
                     attemptParsing = typeCoercion;
                     if (!attemptParsing) {
@@ -87,8 +92,13 @@ public class {{ name }} extends AbstractOpenApiSchema {
                         {%- endif %}
                     }
                 }
+                {%- endif %}
                 if (attemptParsing) {
+                    {%- if unParameterizedDataType == "List" %}
+                    tmp = tree.traverse(jp.getCodec()).readValueAs(new TypeReference<{{ dataType }}>() {});
+                    {%- else %}
                     tmp = tree.traverse(jp.getCodec()).readValueAs({{ unParameterizedDataType }}.class);
+                    {%- endif %}
                     // TODO: there is no validation against JSON schema constraints
                     // (min, max, enum, pattern...), this does not perform a strict JSON
                     // validation, which means the 'match' count may be higher than it should be.