# ParameterValidationException.java

    /*
     * Copyright (c) 2017, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
     *
     * WSO2 Inc. licenses this file to you 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.wso2.carbon.mdm.services.android.exception;

    import org.wso2.carbon.mdm.services.android.util.AndroidConstants;
    import org.wso2.carbon.mdm.services.android.util.AndroidDeviceUtils;

    import javax.validation.ConstraintViolation;
    import javax.ws.rs.WebApplicationException;
    import javax.ws.rs.core.Response;
    import java.util.Set;

    public class ParameterValidationException extends WebApplicationException {

        private String message;
        public <T> ParameterValidationException(Set<ConstraintViolation<T>> violations) {
            super(Response.status(Response.Status.BAD_REQUEST)
                    .entity(AndroidDeviceUtils.getConstraintViolationErrorDTO(violations))
                    .header(AndroidConstants.HEADER_CONTENT_TYPE, AndroidConstants.APPLICATION_JSON)
                    .build());

            //Set the error message
            StringBuilder stringBuilder = new StringBuilder();
            for (ConstraintViolation violation : violations) {
                stringBuilder.append(violation.getRootBeanClass().getSimpleName());
                stringBuilder.append(".");
                stringBuilder.append(violation.getPropertyPath());
                stringBuilder.append(": ");
                stringBuilder.append(violation.getMessage());
                stringBuilder.append(", ");
            }
            message = stringBuilder.toString();
        }

        @Override
        public String getMessage() {
            return message;
        }

    }