Java tutorial
/* * (c) Copyright Reserved EVRYTHNG Limited 2016. All rights reserved. * Use of this material is subject to license. * Copying and unauthorised use of this material strictly prohibited. */ package com.evrythng.thng.resource.model.exception; import com.fasterxml.jackson.annotation.JsonIgnore; import org.apache.commons.lang3.StringUtils; import java.util.ArrayList; import java.util.Collections; import java.util.List; /** * This defines the format of an error message as sent by the API. E.g., in JSON * such a message looks like: {@code{"status": 201, "errors":["message", "...", "moreInfo" : URL]}} * * @author Dominique Guinard (domguinard) */ public class ErrorMessage { private static final String MORE_INFO_ROOT = "https://developers.evrythng.com"; /** * HTTP status */ private int status; /** * Human-friendly error(s) description(s) */ private List<String> errors = new ArrayList<>(); private String moreInfo = MORE_INFO_ROOT; /** * Creates a new ErrorMessage. */ public ErrorMessage() { } /** * Creates a new ErrorMessage. */ public ErrorMessage(final int status) { this.status = status; } /** * Creates a new ErrorMessage containing a single human-friendly description * message. */ public ErrorMessage(final int status, final String error) { this(status, Collections.singletonList(error)); } /** * Creates a new ErrorMessage containing a single human-friendly description * message. * * @param moreInfo Page or anchor in the documentation for more information e.g., #search */ public ErrorMessage(final int code, final String error, final String moreInfo) { this(code, Collections.singletonList(error), ""); } /** * Creates a new error message containing several errors. */ public ErrorMessage(final int code, final List<String> errors) { this(code, errors, ""); } /** * @param moreInfo Page or anchor in the documentation for more information e.g., #search */ public ErrorMessage(final int status, final List<String> errors, final String moreInfo) { this.status = status; this.errors = errors; this.moreInfo = String.format("%s%s", MORE_INFO_ROOT, moreInfo); } public int getStatus() { return status; } public void setStatusCode(final int statusCode) { this.status = statusCode; } public String getMoreInfo() { return moreInfo; } public void setMoreInfo(final String moreInfo) { this.moreInfo = moreInfo; } public List<String> getErrors() { return errors; } public void setErrors(final List<String> errors) { this.errors = errors; } @JsonIgnore public String errorsAsString() { return StringUtils.join(errors, "," + System.lineSeparator()); } }