fix 2.0 spec exception, fix NPE with Parameter

modules/openapi-generator/pom.xml

@@ -197,16 +197,6 @@
         <diffutils-version>1.3.0</diffutils-version>
     </properties>
     <dependencies>
-        <dependency>
-            <groupId>io.swagger</groupId>
-            <artifactId>swagger-models</artifactId>
-            <version>1.5.18</version>
-        </dependency>
-        <dependency>
-            <groupId>io.swagger</groupId>
-            <artifactId>swagger-core</artifactId>
-            <version>1.5.18</version>
-        </dependency>
         <dependency>
             <groupId>io.swagger.core.v3</groupId>
             <artifactId>swagger-models</artifactId>

modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java

@@ -343,5 +343,128 @@ public class CodegenParameter {
         result = 31 * result + (multipleOf != null ? multipleOf.hashCode() : 0);
         return result;
     }
+    public boolean getSecondaryParam() {
+        return secondaryParam;
+    }
+
+    public String getBaseName() {
+        return baseName;
+    }
+
+    public String getParamName() {
+        return paramName;
+    }
+
+    public String getDataType() {
+        return dataType;
+    }
+
+    public String getDatatypeWithEnum() {
+        return datatypeWithEnum;
+    }
+
+    public String getDataFormat() {
+        return dataFormat;
+    }
+
+    public String getCollectionFormat() {
+        return collectionFormat;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public String getUnescapedDescription() {
+        return unescapedDescription;
+    }
+
+    public String getBaseType() {
+        return baseType;
+    }
+
+    public String getDefaultValue() {
+        return defaultValue;
+    }
+
+    public String getEnumName() {
+        return enumName;
+    }
+
+    public String getExample() {
+        return example;
+    }
+
+    public String getJsonSchema() {
+        return jsonSchema;
+    }
+
+    public boolean getIsNotFile() {
+        return notFile;
+    }
+
+    public List<String> get_enum() {
+        return _enum;
+    }
+
+    public Map<String, Object> getAllowableValues() {
+        return allowableValues;
+    }
+
+    public CodegenProperty getItems() {
+        return items;
+    }
+
+    public Map<String, Object> getVendorExtensions() {
+        return vendorExtensions;
+    }
+
+    public boolean getRequired() {
+        return required;
+    }
+
+    public String getMaximum() {
+        return maximum;
+    }
+
+    public boolean getExclusiveMaximum() {
+        return exclusiveMaximum;
+    }
+
+    public String getMinimum() {
+        return minimum;
+    }
+
+    public boolean getExclusiveMinimum() {
+        return exclusiveMinimum;
+    }
+
+    public Integer getMaxLength() {
+        return maxLength;
+    }
+
+    public Integer getMinLength() {
+        return minLength;
+    }
+
+    public String getPattern() {
+        return pattern;
+    }
+
+    public Integer getMaxItems() {
+        return maxItems;
+    }
+
+    public Integer getMinItems() {
+        return minItems;
+    }
+
+    public boolean getUniqueItems() {
+        return uniqueItems;
+    }
+
+    public Number getMultipleOf() {
+        return multipleOf;
+    }
 }
 

modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java

@@ -1955,6 +1955,9 @@ public class DefaultCodegen {
             op.vendorExtensions.putAll(operation.getExtensions());
         }
 
+        if (operation == null)
+            throw new RuntimeException("operation cannnot be null in fromOperation");
+
         // store the original operationId for plug-in
         op.operationIdOriginal = operation.getOperationId();
 
@@ -2282,7 +2285,7 @@ public class DefaultCodegen {
         codegenParameter.baseName = parameter.getName();
         codegenParameter.description = escapeText(parameter.getDescription());
         codegenParameter.unescapedDescription = parameter.getDescription();
-        if (parameter.getRequired()) {
+        if (parameter.getRequired() != null) {
             codegenParameter.required = parameter.getRequired();
         }
         codegenParameter.jsonSchema = Json.pretty(parameter);