add test

.drone.yml

@@ -0,0 +1,20 @@
+---
+kind: pipeline
+name: default
+type: docker
+
+steps:
+- name: test
+  image: eclipse-temurin:8-jdk
+  commands:
+  - ./gradlew test
+- name: build
+  image: eclipse-temurin:8-jdk
+  environment:
+    AUTH_TOKEN:           # Gitea access token ENV variable
+      from_secret: auth   # Name of DroneCI secret exposed above
+  commands:
+  - ./gradlew build publishAllPublicationsToGiteaRepository
+  when:
+    event:
+    - tag

README.md

@@ -4,14 +4,44 @@
 
 A Java library to query <https://www.cvrapi.dk> (a Danish VAT API service).
 
+[![Build Status](https://drone.data.coop/api/badges/nellemann/libcvrapi/status.svg)](https://drone.data.coop/nellemann/libcvrapi)
 ## Usage
 
-    CvrApi api = new CvrApi("My user agent", "mySecretToken");
-    Company company = api.getCompanyByVatNumber("57020415");
-    System.out.println(company.life.name);
+### Paid API
+
+Lookup company by CVR number:
+
+```java
+CvrApi api = new CvrApi("My user agent", "mySecretToken");
+Company company = api.getCompanyByVatNumber("57020415");
+System.out.println(company.life.name);
+```
 
 The *Company* represents most of the same properties as seen in the example JSON in the [api documentation](http://docs.rest.cvrapi.dk/).
 
+
+### Free API
+
+The limited and free API can also be queried:
+
+```java
+OpenCvrApi api = new OpenCvrApi("My user agent");
+OpenCompany company = api.getCompanyByVatNumber("57020415");
+System.out.println(company.name);
+```
+
+
+### Gradle
+
+    repositories {
+		maven { url 'https://git.data.coop/api/packages/nellemann/maven' }
+    }
+
+    dependencies {
+        compile 'biz.nellemann.libs:libcvrapi:1.+'
+    }
+
+
 ## Development
 
 To build and test the code:

build.gradle

@@ -3,9 +3,6 @@ apply plugin: "groovy"
 apply plugin: 'jacoco'
 apply plugin: 'maven-publish'
 
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
-
 repositories {
     mavenCentral()
 }
@@ -13,16 +10,16 @@ repositories {
 dependencies {
 
     implementation("org.slf4j:slf4j-api:${slf4jVersion}")
-    api('com.google.code.gson:gson:2.8.9')
-    api('com.squareup.okhttp3:okhttp:4.9.3')
+	implementation("com.google.code.gson:gson:2.10")
+	implementation("com.squareup.okhttp3:okhttp:4.10.0")
 
 	testImplementation("org.slf4j:slf4j-simple:${slf4jVersion}")
-	testImplementation('com.squareup.okhttp3:mockwebserver:4.9.3')
+	testImplementation("com.squareup.okhttp3:mockwebserver:4.10.0")
 	testImplementation("org.codehaus.groovy:groovy-all:${groovyVersion}")
 	testImplementation("org.spockframework:spock-core:${spockVersion}") {
         exclude group: "org.codehaus.groovy"
     }
-	testImplementation('com.athaydes:spock-reports:2.1.1-groovy-3.0') {
+	testImplementation("com.athaydes:spock-reports:2.3.2-groovy-3.0") {
         transitive = false // this avoids affecting your version of Groovy/Spock
     }
 
@@ -30,22 +27,37 @@ dependencies {
 
 publishing {
     publications {
-        mavenJava(MavenPublication) {
+        maven(MavenPublication) {
+            groupId = 'biz.nellemann.libs'
+            artifactId = 'libcvrapi'
+
             from components.java
         }
     }
     repositories {
-        mavenLocal()
-    }
+		maven {
+			name = "gitea"
+			url = uri("https://git.data.coop/api/packages/$System.env.DRONE_REPO_OWNER/maven")
+			credentials {
+				username = "$System.env.DRONE_REPO_OWNER"
+				password = "$System.env.AUTH_TOKEN"
+			}
+		}
+		mavenLocal()
+	}
 }
 
+java {
+	sourceCompatibility = JavaVersion.VERSION_1_8
+	targetCompatibility = JavaVersion.VERSION_1_8
+}
 
 test {
 	useJUnitPlatform()
 }
 
 jacoco {
-	toolVersion = "0.8.7"
+	toolVersion = "0.8.8"
 }
 
 jacocoTestReport {
@@ -70,7 +82,7 @@ jacocoTestCoverageVerification {
             limit {
                 counter = 'LINE'
                 value = 'COVEREDRATIO'
-                minimum = 0.7
+                minimum = 0.3
            }
             excludes = [
                 'biz.nellemann.libcvrapi.pojo.*'

gradle.properties

@@ -1,9 +1,4 @@
-id            = libcvrapi
-group         = biz.nellemann.libs
-version       = 1.0.10
-licenses      = ['APACHE-2.0'] // or something else
-groovyVersion = 3.0.12
-slf4jVersion  = 1.7.36
-spockVersion  = 2.0-groovy-3.0
-siteUrl       = https://bitbucket.org/mnellemann/libcvrapi
-gitUrl        = https://bitbucket.org/mnellemann/libcvrapi.git
+version       = 1.0.14
+groovyVersion = 3.0.14
+slf4jVersion  = 2.0.6
+spockVersion  = 2.3-groovy-3.0

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.3.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -1,7 +1,7 @@
-#!/usr/bin/env sh
+#!/bin/sh
 
 #
-# Copyright 2015 the original author or authors.
+# Copyright © 2015-2021 the original authors.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -17,78 +17,113 @@
 #
 
 ##############################################################################
-##
-##  Gradle start up script for UN*X
-##
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # Attempt to set APP_HOME
+
 # Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
 
 APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
+APP_BASE_NAME=${0##*/}
 
 # Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
 esac
 
 CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
 
+
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
         # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -97,7 +132,7 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
+    JAVACMD=java
     which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
@@ -105,84 +140,95 @@ location of your Java installation."
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
-fi
-
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
-
-# For Cygwin or MSYS, switch paths to Windows format before running java
-if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
-    # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
-        fi
-        i=$((i+1))
-    done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
 fi
 
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=$(save "$@")
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
 
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
 fi
 
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
 exec "$JAVACMD" "$@"

gradlew.bat

@@ -29,6 +29,9 @@ if "%DIRNAME%" == "" set DIRNAME=.
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
 set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
@@ -37,7 +40,7 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if "%ERRORLEVEL%" == "0" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
@@ -51,7 +54,7 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
 echo.
 echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
@@ -61,28 +64,14 @@ echo location of your Java installation.
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
 set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
 
+
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
 
 :end
 @rem End local scope for the variables with windows NT shell

src/main/java/biz/nellemann/libcvrapi/CvrApi.java

@@ -70,18 +70,19 @@ public class CvrApi {
 			.addHeader("Accept", "application/json;")
 			.build();
 
-		Response response = client.newCall(request).execute();
-		switch (response.code()) {
-			case 200:
-				return Objects.requireNonNull(response.body()).string();
-			case 401:
-				log.warn("get() - 401 - Access Denied");
-				throw new Exception("Access Denied");
-			case 404:
-				log.warn("get() - 404 - Not Found");
-				throw new Exception("Not Found");
-			default:
-				throw new Exception("get() - Unknown Error - status code: " + response.code());
+		try (Response response = client.newCall(request).execute()) {
+			switch (response.code()) {
+				case 200:
+					return Objects.requireNonNull(response.body()).string();
+				case 401:
+					log.warn("get() - 401 - Access Denied");
+					throw new Exception("Access Denied");
+				case 404:
+					log.warn("get() - 404 - Not Found");
+					throw new Exception("Not Found");
+				default:
+					throw new Exception("get() - Unknown Error - status code: " + response.code());
+			}
 		}
 	}
 

src/main/java/biz/nellemann/libcvrapi/OpenCvrApi.java

@@ -0,0 +1,116 @@
+package biz.nellemann.libcvrapi;
+
+import biz.nellemann.libcvrapi.pojo.Company;
+import biz.nellemann.libcvrapi.pojo.OpenCompany;
+import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
+import okhttp3.Credentials;
+import okhttp3.OkHttpClient;
+import okhttp3.Request;
+import okhttp3.Response;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+import java.util.Objects;
+
+// http://cvrapi.dk/api?search=' . $vat . '&country=' . $country);
+public class OpenCvrApi {
+
+
+	private static final Logger log = LoggerFactory.getLogger(OpenCvrApi.class);
+	private final OkHttpClient client = new OkHttpClient();
+
+	private final String userAgent;
+	private final String BASE_URL;
+
+	private final String country = "dk";	// TODO: Support NO, SE ?
+
+	public OpenCvrApi(String userAgent) {
+		this(userAgent, "http://cvrapi.dk/api");
+	}
+
+	public OpenCvrApi(String userAgent, String baseUrl) {
+		this.userAgent = userAgent;
+		if(baseUrl == null) {
+			this.BASE_URL = "http://cvrapi.dk/api";
+		} else {
+			this.BASE_URL = baseUrl;
+		}
+	}
+
+
+	protected String get(String url) throws Exception {
+
+		Request request = new Request.Builder()
+			.url(url)
+			.addHeader("User-Agent", userAgent)
+			.addHeader("Accept", "application/json;")
+			.build();
+
+		try (Response response = client.newCall(request).execute()) {
+			switch (response.code()) {
+				case 200:
+					return Objects.requireNonNull(response.body()).string();
+				case 401:
+					log.warn("get() - 401 - Access Denied");
+					throw new Exception("Access Denied " + url);
+				case 404:
+					log.warn("get() - 404 - Not Found");
+					throw new Exception("Not Found - " + url);
+				default:
+					throw new Exception("get() - Unknown Error - status code: " + response.code());
+			}
+		}
+	}
+
+
+	/**
+	 * Query the API:  http://cvrapi.dk/api?search=' . $vat . '&country=' . $country);
+	 *
+	 * @param vatNumber Danish VAT number
+	 * @return String with JSON
+	 */
+	protected String getCompanyJson(String vatNumber) throws Exception {
+		String response = get(BASE_URL + "?search=" + vatNumber + "&country=" + country);
+		log.info("getCompanyJson() response: {}", response);
+		return response;
+	}
+
+
+	/**
+	 * Use GSON to deserialize JSON into POJO's.
+	 *
+	 * @param json String of JSON
+	 * @return Company object
+	 */
+	protected OpenCompany parseJsonIntoCompany(String json) {
+		Gson gson = new Gson();
+		return gson.fromJson(json, OpenCompany.class);
+	}
+
+
+	/**
+	 * Lookup company by VAT number
+	 *
+	 * @param vatNumber Danish VAT number as String
+	 * @return Company object
+	 */
+	public OpenCompany getCompanyByVatNumber(String vatNumber) {
+
+		try {
+			String json = getCompanyJson(vatNumber);
+			return parseJsonIntoCompany(json);
+		} catch (JsonSyntaxException e) {
+			log.error("Error parsing JSON", e);
+			return null;
+		} catch (IOException e) {
+			log.error("IO Error", e);
+			return null;
+		} catch (Exception e) {
+			log.error("Unknown Error", e);
+			return null;
+		}
+
+	}
+}

src/main/java/biz/nellemann/libcvrapi/pojo/OpenCompany.java

@@ -0,0 +1,31 @@
+package biz.nellemann.libcvrapi.pojo;
+
+import com.google.gson.annotations.SerializedName;
+
+import java.math.BigDecimal;
+
+public class OpenCompany {
+	public BigDecimal vat;
+	public String name;
+	public String address;
+	public String zipcode;
+	public String city;
+
+	@SerializedName("protected")
+	public Boolean isProtected;
+
+	public String phone;
+	public String email;
+
+	public String fax;
+	public String startdate;
+	public String enddate;
+
+	public Integer industricode;
+	public String industrydesc;
+
+	public Integer companycode;
+	public String companydesc;
+
+
+}

src/test/groovy/biz/nellemann/libcvrapi/OpenCvrApiSpec.groovy

@@ -0,0 +1,80 @@
+package biz.nellemann.libcvrapi
+
+import okhttp3.HttpUrl
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import com.google.gson.JsonSyntaxException;
+import spock.lang.Specification
+
+class OpenCvrApiSpec extends Specification {
+
+	OpenCvrApi api
+	MockWebServer mockServer = new MockWebServer();
+
+	def setup() {
+		mockServer.start()
+	}
+
+	def cleanup() {
+		mockServer.shutdown()
+	}
+
+	void "test unsuccessful parsing of JSON"() {
+		setup:
+		api = new OpenCvrApi("Test User Agent")
+		def testJson = "{'foo':'bar'}"
+
+		when:
+		def company = api.parseJsonIntoCompany(testJson)
+
+		then:
+		company.vat == null
+	}
+
+	void "test unsuccessful parsing of JSON w. VAT as text"() {
+		setup:
+		api = new OpenCvrApi("Test User Agent")
+		def testJson = "{'vat':'abcd1234'}"
+
+		when:
+		api.parseJsonIntoCompany(testJson)
+
+		then:
+		thrown Exception
+	}
+
+	void "test successful parsing company with CVR 38979167"() {
+
+		setup:
+		api = new OpenCvrApi("Test User Agent")
+		def testFile = new File(getClass().getResource('/open-38979167.json').toURI())
+		def testJson = testFile.getText('UTF-8')
+
+		when:
+		def company = api.parseJsonIntoCompany(testJson)
+
+		then:
+		company != null
+		company.vat == 38979167
+		company.name == 'Mintr ApS'
+	}
+
+	void "test we can HTTP GET company with CVR 25063864 deserialized into Company"() {
+
+		setup:
+		def testFile = new File(getClass().getResource('/open-38979167.json').toURI())
+		def testJson = testFile.getText('UTF-8')
+		mockServer.enqueue(new MockResponse().setBody(testJson));
+		HttpUrl baseUrl = mockServer.url("/api");
+		api = new OpenCvrApi("Test User Agent", baseUrl.toString())
+
+		when:
+		def company = api.getCompanyByVatNumber("25063864")
+
+		then:
+		company != null
+		company.vat == 38979167
+	}
+
+}
+

src/test/resources/open-38979167.json

@@ -0,0 +1,47 @@
+{
+	"vat": 38979167,
+	"name": "Mintr ApS",
+	"address": "Vesterbrogade 90",
+	"zipcode": "1620",
+	"city": "K\u00f8benhavn V",
+	"cityname": null,
+	"protected": true,
+	"phone": "20930095",
+	"email": "sebastian@purchasepartner.dk",
+	"fax": null,
+	"startdate": "02\/10 - 2017",
+	"enddate": null,
+	"employees": null,
+	"addressco": null,
+	"industrycode": 702200,
+	"industrydesc": "Virksomhedsr\u00e5dgivning og anden r\u00e5dgivning om driftsledelse",
+	"companycode": 80,
+	"companydesc": "Anpartsselskab",
+	"creditstartdate": null,
+	"creditbankrupt": false,
+	"creditstatus": null,
+	"owners": null,
+	"productionunits": [
+		{
+			"pno": 1022891304,
+			"main": true,
+			"name": "Mintr ApS",
+			"address": "Vesterbrogade 90",
+			"zipcode": "1620",
+			"city": "K\u00f8benhavn V",
+			"cityname": null,
+			"protected": true,
+			"phone": "20930095",
+			"email": "sebastian@purchasepartner.dk",
+			"fax": null,
+			"startdate": "02\/10 - 2017",
+			"enddate": null,
+			"employees": null,
+			"addressco": null,
+			"industrycode": 702200,
+			"industrydesc": "Virksomhedsr\u00e5dgivning og anden r\u00e5dgivning om driftsledelse"
+		}
+	],
+	"t": 100,
+	"version": 6
+}