/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.rakam.server.http;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiParam;
import io.swagger.converter.ModelConverters;
import io.swagger.models.Model;
import io.swagger.models.Swagger;
import io.swagger.models.parameters.AbstractSerializableParameter;
import io.swagger.models.parameters.BodyParameter;
import io.swagger.models.parameters.Parameter;
import io.swagger.models.properties.ArrayProperty;
import io.swagger.models.properties.Property;
import io.swagger.models.properties.PropertyBuilder;
import io.swagger.util.AllowableValues;
import io.swagger.util.AllowableValuesUtils;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.math.BigDecimal;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;
public class ParameterProcessor {
static Logger LOGGER = LoggerFactory.getLogger(ParameterProcessor.class);
public static Parameter applyAnnotations(Swagger swagger, Parameter parameter, Type type, List<Annotation> annotations) {
final AnnotationsHelper helper = new AnnotationsHelper(annotations);
if (helper.isContext()) {
return null;
}
final ParamWrapper<?> param = helper.getApiParam();
if (param.isHidden()) {
return null;
}
final String defaultValue = helper.getDefaultValue();
if (parameter instanceof AbstractSerializableParameter) {
final AbstractSerializableParameter<?> p = (AbstractSerializableParameter<?>) parameter;
if (param.isRequired()) {
p.setRequired(true);
}
if (StringUtils.isNotEmpty(param.getName())) {
p.setName(param.getName());
}
if (StringUtils.isNotEmpty(param.getDescription())) {
p.setDescription(param.getDescription());
}
if (StringUtils.isNotEmpty(param.getAccess())) {
p.setAccess(param.getAccess());
}
if (StringUtils.isNotEmpty(param.getDataType())) {
p.setType(param.getDataType());
}
AllowableValues allowableValues = AllowableValuesUtils.create(param.getAllowableValues());
if (p.getItems() != null || param.isAllowMultiple()) {
if (p.getItems() == null) {
// Convert to array
final Map<PropertyBuilder.PropertyId, Object> args = new EnumMap<PropertyBuilder.PropertyId, Object>(PropertyBuilder.PropertyId.class);
args.put(PropertyBuilder.PropertyId.DEFAULT, p.getDefaultValue());
p.setDefaultValue(null);
args.put(PropertyBuilder.PropertyId.ENUM, p.getEnum());
p.setEnum(null);
args.put(PropertyBuilder.PropertyId.MINIMUM, p.getMinimum());
p.setMinimum(null);
args.put(PropertyBuilder.PropertyId.EXCLUSIVE_MINIMUM, p.isExclusiveMinimum());
p.setExclusiveMinimum(null);
args.put(PropertyBuilder.PropertyId.MAXIMUM, p.getMaximum());
p.setMaximum(null);
args.put(PropertyBuilder.PropertyId.EXCLUSIVE_MAXIMUM, p.isExclusiveMaximum());
p.setExclusiveMaximum(null);
Property items = PropertyBuilder.build(p.getType(), p.getFormat(), args);
p.type(ArrayProperty.TYPE).format(null).items(items);
}
final Map<PropertyBuilder.PropertyId, Object> args = new EnumMap<PropertyBuilder.PropertyId, Object>(PropertyBuilder.PropertyId.class);
if (StringUtils.isNotEmpty(defaultValue)) {
args.put(PropertyBuilder.PropertyId.DEFAULT, defaultValue);
}
if (allowableValues != null) {
args.putAll(allowableValues.asPropertyArguments());
}
PropertyBuilder.merge(p.getItems(), args);
} else {
if (StringUtils.isNotEmpty(defaultValue)) {
p.setDefaultValue(defaultValue);
}
processAllowedValues(allowableValues, p);
}
} else {
// must be a body param
BodyParameter bp = new BodyParameter();
bp.setRequired(param.isRequired());
bp.setName(StringUtils.isNotEmpty(param.getName()) ? param.getName() : "body");
if (StringUtils.isNotEmpty(param.getDescription())) {
bp.setDescription(param.getDescription());
}
if (StringUtils.isNotEmpty(param.getAccess())) {
bp.setAccess(param.getAccess());
}
final Property property = ModelConverters.getInstance().readAsProperty(type);
if (property != null) {
final Map<PropertyBuilder.PropertyId, Object> args = new EnumMap<PropertyBuilder.PropertyId, Object>(PropertyBuilder.PropertyId.class);
if (StringUtils.isNotEmpty(defaultValue)) {
args.put(PropertyBuilder.PropertyId.DEFAULT, defaultValue);
}
bp.setSchema(PropertyBuilder.toModel(PropertyBuilder.merge(property, args)));
for (Map.Entry<String, Model> entry : ModelConverters.getInstance().readAll(type).entrySet()) {
swagger.addDefinition(entry.getKey(), entry.getValue());
}
}
parameter = bp;
}
return parameter;
}
private static void processAllowedValues(AllowableValues allowableValues, AbstractSerializableParameter<?> p) {
if (allowableValues == null) {
return;
}
Map<PropertyBuilder.PropertyId, Object> args = allowableValues.asPropertyArguments();
if (args.containsKey(PropertyBuilder.PropertyId.ENUM)) {
p.setEnum((List<String>) args.get(PropertyBuilder.PropertyId.ENUM));
} else {
if (args.containsKey(PropertyBuilder.PropertyId.MINIMUM)) {
p.setMinimum((BigDecimal) args.get(PropertyBuilder.PropertyId.MINIMUM));
}
if (args.containsKey(PropertyBuilder.PropertyId.MAXIMUM)) {
p.setMaximum((BigDecimal) args.get(PropertyBuilder.PropertyId.MAXIMUM));
}
if (args.containsKey(PropertyBuilder.PropertyId.EXCLUSIVE_MINIMUM)) {
p.setExclusiveMinimum((Boolean) args.get(PropertyBuilder.PropertyId.EXCLUSIVE_MINIMUM) ? true : null);
}
if (args.containsKey(PropertyBuilder.PropertyId.EXCLUSIVE_MAXIMUM)) {
p.setExclusiveMaximum((Boolean) args.get(PropertyBuilder.PropertyId.EXCLUSIVE_MAXIMUM) ? true : null);
}
}
}
/**
* Wraps either an @ApiParam or and @ApiImplicitParam
*/
public interface ParamWrapper<T extends Annotation> {
String getName();
String getDescription();
String getDefaultValue();
String getAllowableValues();
boolean isRequired();
String getAccess();
boolean isAllowMultiple();
String getDataType();
String getParamType();
T getAnnotation();
boolean isHidden();
}
/**
* The <code>AnnotationsHelper</code> class defines helper methods for
* accessing supported parameter annotations.
*/
private static class AnnotationsHelper {
private static final ApiParam DEFAULT_API_PARAM = getDefaultApiParam(null);
private boolean context;
private ParamWrapper<?> apiParam = new ApiParamWrapper(DEFAULT_API_PARAM);
private String defaultValue;
/**
* Constructs an instance.
*
* @param annotations array or parameter annotations
*/
public AnnotationsHelper(List<Annotation> annotations) {
String rsDefault = null;
for (Annotation item : annotations) {
if ("javax.ws.rs.core.Context".equals(item.annotationType().getName())) {
context = true;
} else if (item instanceof ApiParam) {
apiParam = new ApiParamWrapper((ApiParam) item);
} else if (item instanceof ApiImplicitParam) {
apiParam = new ApiImplicitParamWrapper((ApiImplicitParam) item);
} else if ("javax.ws.rs.DefaultValue".equals(item.annotationType().getName())) {
try {
rsDefault = (String) item.getClass().getMethod("value").invoke(item);
} catch (Exception ex) {
LOGGER.error("Invocation of value method failed", ex);
}
}
}
defaultValue = StringUtils.isNotEmpty(apiParam.getDefaultValue()) ? apiParam.getDefaultValue() : rsDefault;
}
/**
* Returns a default @{@link ApiParam} annotation for parameters without it.
*
* @param annotationHolder a placeholder for default @{@link ApiParam}
* annotation
* @return @{@link ApiParam} annotation
*/
private static ApiParam getDefaultApiParam(@ApiParam String annotationHolder) {
for (Method method : AnnotationsHelper.class.getDeclaredMethods()) {
if ("getDefaultApiParam".equals(method.getName())) {
return (ApiParam) method.getParameterAnnotations()[0][0];
}
}
throw new IllegalStateException("Failed to locate default @ApiParam");
}
public boolean isContext() {
return context;
}
/**
* Returns @{@link ApiParam} annotation. If no @{@link ApiParam} is present
* a default one will be returned.
*
* @return @{@link ApiParam} annotation
*/
public ParamWrapper<?> getApiParam() {
return apiParam;
}
/**
* Returns default value from annotation.
*
* @return default value from annotation
*/
public String getDefaultValue() {
return defaultValue;
}
}
/**
* Wrapper implementation for ApiParam annotation
*/
private final static class ApiParamWrapper implements ParamWrapper<ApiParam> {
private final ApiParam apiParam;
private ApiParamWrapper(ApiParam apiParam) {
this.apiParam = apiParam;
}
@Override
public String getName() {
return apiParam.name();
}
@Override
public String getDescription() {
return apiParam.value();
}
@Override
public String getDefaultValue() {
return apiParam.defaultValue();
}
@Override
public String getAllowableValues() {
return apiParam.allowableValues();
}
@Override
public boolean isRequired() {
return apiParam.required();
}
@Override
public String getAccess() {
return apiParam.access();
}
@Override
public boolean isAllowMultiple() {
return apiParam.allowMultiple();
}
@Override
public String getDataType() {
return null;
}
@Override
public String getParamType() {
return null;
}
@Override
public ApiParam getAnnotation() {
return apiParam;
}
@Override
public boolean isHidden() {
return apiParam.hidden();
}
}
/**
* Wrapper implementation for ApiImplicitParam annotation
*/
private final static class ApiImplicitParamWrapper implements ParamWrapper<ApiImplicitParam> {
private final ApiImplicitParam apiParam;
private ApiImplicitParamWrapper(ApiImplicitParam apiParam) {
this.apiParam = apiParam;
}
@Override
public String getName() {
return apiParam.name();
}
@Override
public String getDescription() {
return apiParam.value();
}
@Override
public String getDefaultValue() {
return apiParam.defaultValue();
}
@Override
public String getAllowableValues() {
return apiParam.allowableValues();
}
@Override
public boolean isRequired() {
return apiParam.required();
}
@Override
public String getAccess() {
return apiParam.access();
}
@Override
public boolean isAllowMultiple() {
return apiParam.allowMultiple();
}
@Override
public String getDataType() {
return apiParam.dataType();
}
@Override
public String getParamType() {
return apiParam.paramType();
}
@Override
public ApiImplicitParam getAnnotation() {
return apiParam;
}
@Override
public boolean isHidden() {
return false;
}
}
}
