created validate api for call

src/main/java/net/gepafin/tendermanagement/util/FieldValidator.java

@@ -0,0 +1,40 @@
+package net.gepafin.tendermanagement.util;
+
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+import net.gepafin.tendermanagement.config.Translator;
+import net.gepafin.tendermanagement.constants.GepafinConstant;
+import net.gepafin.tendermanagement.web.rest.api.errors.Status;
+import net.gepafin.tendermanagement.web.rest.api.errors.ValidationException;
+
+public class FieldValidator {
+
+	private final List<String> errors = new ArrayList<>();
+
+	public static FieldValidator create() {
+		return new FieldValidator();
+	}
+
+	public FieldValidator notNull(Object object, String fieldName) {
+		if (Objects.isNull(object)) {
+			errors.add(MessageFormat.format(Translator.toLocale(GepafinConstant.FIELD_NOT_NULL), fieldName));
+		}
+		return this;
+	}
+
+	public FieldValidator notEmpty(List<?> list, String fieldName) {
+		if (list == null || list.isEmpty()) {
+			errors.add(MessageFormat.format(Translator.toLocale(GepafinConstant.FIELD_NOT_EMPTY), fieldName));
+		}
+		return this;
+	}
+
+	public void validate() {
+		if (!errors.isEmpty()) {
+			throw new ValidationException(Status.VALIDATION_ERROR, errors);
+		}
+	}
+}