Index mapping with field not indexed results in java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String

[nreese]

Steps to reproduce

• Create and post a mapping for an Elasticsearch index. The mapping needs to include a field that is not indexed.

  "field_name" : {
      "index" : false
  }

• In geoserver, create a store for the index. Use the REST interface (port 9200). After the store is created, try to publish the layer.

Geoserver fails with the following error

Caused by: java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
    at mil.nga.giat.data.elasticsearch.ElasticCompat5.isAnalyzed(ElasticCompat5.java:88)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.add(ElasticDataStore.java:340)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.walk(ElasticDataStore.java:313)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.walk(ElasticDataStore.java:310)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.getElasticAttributes(ElasticDataStore.java:150)
    at mil.nga.giat.data.elasticsearch.ElasticFeatureSource.<init>(ElasticFeatureSource.java:48)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.createFeatureSource(ElasticDataStore.java:111)
    at org.geotools.data.store.ContentDataStore.getFeatureSource(ContentDataStore.java:395)
    at mil.nga.giat.data.elasticsearch.ElasticDataStore.getFeatureSource(ElasticDataStore.java:122)
    at org.geotools.data.store.ContentDataStore.getFeatureSource(ContentDataStore.java:686)
    at org.geotools.data.store.ContentDataStore.getFeatureSource(ContentDataStore.java:103)
    at org.geoserver.catalog.CatalogBuilder.buildFeatureType(CatalogBuilder.java:333)
    at org.geoserver.web.data.layer.NewLayerPage.buildLayerInfo(NewLayerPage.java:359)
    ... 121 more

I looks like Elasticsearch 5.x changed the value of index from a String (that used to be analyzed, not_analyzed, and no) to just a Boolean.