Fix NPE & use correct mime for plain text

Author: ciis0

modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java

@@ -1,5 +1,23 @@
 package io.swagger.codegen;
 
+import com.google.common.base.Function;
+import com.google.common.collect.Lists;
+import com.samskivert.mustache.Mustache;
+import com.samskivert.mustache.Mustache.Compiler;
+import com.samskivert.mustache.Template;
+import io.swagger.codegen.examples.ExampleGenerator;
+import io.swagger.models.*;
+import io.swagger.models.auth.*;
+import io.swagger.models.parameters.*;
+import io.swagger.models.properties.*;
+import io.swagger.models.properties.PropertyBuilder.PropertyId;
+import io.swagger.util.Json;
+import org.apache.commons.lang3.ObjectUtils;
+import org.apache.commons.lang3.StringEscapeUtils;
+import org.apache.commons.lang3.StringUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import javax.annotation.Nullable;
 import java.io.File;
 import java.io.IOException;
@@ -12,64 +30,6 @@
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
-import com.samskivert.mustache.Mustache;
-import com.samskivert.mustache.Template;
-import io.swagger.models.properties.UntypedProperty;
-import org.apache.commons.lang3.ObjectUtils;
-import org.apache.commons.lang3.StringEscapeUtils;
-import org.apache.commons.lang3.StringUtils;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-import com.google.common.base.Function;
-import com.google.common.collect.Lists;
-import com.samskivert.mustache.Mustache.Compiler;
-
-import io.swagger.codegen.examples.ExampleGenerator;
-import io.swagger.models.ArrayModel;
-import io.swagger.models.ComposedModel;
-import io.swagger.models.Model;
-import io.swagger.models.ModelImpl;
-import io.swagger.models.Operation;
-import io.swagger.models.RefModel;
-import io.swagger.models.Response;
-import io.swagger.models.Swagger;
-import io.swagger.models.auth.ApiKeyAuthDefinition;
-import io.swagger.models.auth.BasicAuthDefinition;
-import io.swagger.models.auth.In;
-import io.swagger.models.auth.OAuth2Definition;
-import io.swagger.models.auth.SecuritySchemeDefinition;
-import io.swagger.models.parameters.BodyParameter;
-import io.swagger.models.parameters.CookieParameter;
-import io.swagger.models.parameters.FormParameter;
-import io.swagger.models.parameters.HeaderParameter;
-import io.swagger.models.parameters.Parameter;
-import io.swagger.models.parameters.PathParameter;
-import io.swagger.models.parameters.QueryParameter;
-import io.swagger.models.parameters.SerializableParameter;
-import io.swagger.models.properties.AbstractNumericProperty;
-import io.swagger.models.properties.ArrayProperty;
-import io.swagger.models.properties.BaseIntegerProperty;
-import io.swagger.models.properties.BinaryProperty;
-import io.swagger.models.properties.BooleanProperty;
-import io.swagger.models.properties.ByteArrayProperty;
-import io.swagger.models.properties.DateProperty;
-import io.swagger.models.properties.DateTimeProperty;
-import io.swagger.models.properties.DecimalProperty;
-import io.swagger.models.properties.DoubleProperty;
-import io.swagger.models.properties.FileProperty;
-import io.swagger.models.properties.FloatProperty;
-import io.swagger.models.properties.IntegerProperty;
-import io.swagger.models.properties.LongProperty;
-import io.swagger.models.properties.MapProperty;
-import io.swagger.models.properties.Property;
-import io.swagger.models.properties.PropertyBuilder;
-import io.swagger.models.properties.PropertyBuilder.PropertyId;
-import io.swagger.models.properties.RefProperty;
-import io.swagger.models.properties.StringProperty;
-import io.swagger.models.properties.UUIDProperty;
-import io.swagger.util.Json;
-
 public class DefaultCodegen {
     protected static final Logger LOGGER = LoggerFactory.getLogger(DefaultCodegen.class);
 
@@ -2313,7 +2273,7 @@ public CodegenOperation fromOperation(String path,
                     op.isResponseFile = Boolean.TRUE;
                 }
                 if (Boolean.TRUE.equals(r.isString)
-                        && operation.getProduces().contains("plain/text") // otherwise if "application/json" => wrap text with "..", and escape
+                        && operation.getProduces() != null && operation.getProduces().contains("text/plain") // otherwise if "application/json" => wrap text with "..", and escape
                         && Boolean.TRUE.equals(r.isDefault)){
                     op.isResponseText = Boolean.TRUE;
                 }