[add] gradle todo

.classpath

@@ -2,7 +2,7 @@
 <classpath>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-17"/>
 	<classpathentry kind="src" path="src/java"/>
-	<classpathentry kind="lib" path="c:/Users/mrwhe/Desktop/basex.home/basex.107/BaseX.jar"/>
-	<classpathentry kind="lib" path="C:/Users/mrwhe/git/expkg-zone58/ex-thumbnailator/lib/thumbnailator-0.4.20.jar"/>
+	<classpathentry kind="lib" path="lib/BaseX107.jar"/>
+	<classpathentry kind="lib" path="lib/thumbnailator-0.4.20.jar"/>
 	<classpathentry kind="output" path="build/classes"/>
 </classpath>

.gitattributes

@@ -0,0 +1,12 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
+# Binary files should be left untouched
+*.jar           binary
+

.gitignore

@@ -1 +1,11 @@
 /build/
+/dist/
+
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build
+
+# Ignore Kotlin plugin data
+.kotlin

AGENTS.md

@@ -0,0 +1,44 @@
+# AGENTS.md
+
+## Repo: ex-thumbnailator
+
+XQuery module for BaseX 10+ wrapping thumbnailator Java library.
+
+## Quick start
+
+- **Build**: `tools/build.xq` → `dist/thumbnailator-8.0.1.xar`
+- **Test**: `src/test/test.xqm` (`%unit:test` functions)
+- **Sample**: `src/test/sample.xq`
+
+## API
+
+| Function | Returns |
+|----------|---------|
+| `thumbnails:size($src, $w, $h)` | `xs:base64Binary` |
+| `thumbnails:scale($src, $x, $y)` | `xs:base64Binary` |
+| `thumbnails:task($src, $task)` | `xs:base64Binary` |
+| `thumbnails:validate($src)` | `empty-sequence()` or error |
+| `thumbnails:validation-report($src)` | `element(report)` |
+
+Inputs from `fetch:binary()`, outputs via `file:write-binary()`.
+
+## XML schema
+
+- Root: `<thumbnail>` (not `<task>`)
+- Either `<size>` or `<scale>` required
+- `constrain@exif="true"` default: swaps dimensions for portrait, ignores `flip`
+
+## Structure
+
+```
+src/main/           # XQuery, JARs, XSD, basex.xml, expath-pkg.xml
+src/java/           # Thumbs.java (BaseX QueryModule)
+src/test/           # test.xqm, sample.xq, test tasks
+tools/              # build.xq
+dist/               # built xar package
+```
+
+## Setup
+
+- BaseX 10+, Java 17
+- JARs: `thumbnailator-0.4.13.jar`, `thumbhelper-8.0.0.jar`

gradle.properties

@@ -0,0 +1,5 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+
+org.gradle.configuration-cache=true
+

gradle/libs.versions.toml

@@ -0,0 +1,12 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/version_catalogs.html#sec::toml-dependencies-format
+
+[versions]
+commons-math3 = "3.6.1"
+guava = "33.5.0-jre"
+junit = "4.13.2"
+
+[libraries]
+commons-math3 = { module = "org.apache.commons:commons-math3", version.ref = "commons-math3" }
+guava = { module = "com.google.guava:guava", version.ref = "guava" }
+junit = { module = "junit:junit", version.ref = "junit" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,248 @@
+#!/bin/sh
+
+#
+# Copyright © 2015 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.
+# You may obtain a copy of the License at
+#
+#      https://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.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   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/2d6327017519d23b96af35865dc997fcb544fb40/platforms/jvm/plugins-application/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
+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
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+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 "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$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
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+
+    JAVACMD=$( 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
+
+
+# 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"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$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

@@ -0,0 +1,93 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+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"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

package.xml

@@ -1,4 +1,3 @@
-<!--  @see http://cxan.org/faq#add-pkg  -->
 <repo abbrev="ex-thumbnailator">
   <pkg abbrev="ex-thumbnailator" id="https://github.com/expkg-zone58/ex-thumbnailator">
     <name>https://github.com/expkg-zone58/ex-thumbnailator</name>
@@ -10,61 +9,8 @@
     <tag>image</tag>
     <tag>resize</tag>
     <tag>graphic</tag>
-    <version num="4.1.4">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="4.1.5">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.0">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.1">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.2">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.3">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.4">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.5">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.7">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.8">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.9">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.10">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-    <version num="5.0.11">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="6.0.0">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="6.0.1">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="6.0.2">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="7.0.0">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="7.0.1">
-      <!-- generated: {fn:current-dateTime()} -->
-    </version>
-  <version num="8.0.1">
+  
+    <version num="8.0.1">
       <!-- generated: {fn:current-dateTime()} -->
     </version>
   </pkg>

settings.gradle.kts

@@ -0,0 +1,14 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/9.4.1/userguide/multi_project_builds.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id("org.gradle.toolchains.foojay-resolver-convention") version "1.0.0"
+}
+
+rootProject.name = "ex-thumbnailator"
+include("xar")

src/main/basex.xml

@@ -1,5 +1,5 @@
 <package xmlns="http://www.basex.org/modules/pkg">
   <jar>thumbhelper-8.0.0.jar</jar>
-   <jar>thumbnailator-0.4.13.jar</jar>
-   <class>org.expkgzone58.image.Thumbs</class>
+  <jar>thumbnailator-0.4.13.jar</jar>
+  <class>org.expkgzone58.image.Thumbs</class>
 </package>

tools/buildx.xqm

@@ -8,10 +8,11 @@
 module namespace build = 'quodatum.utils.build';
 declare default function namespace 'quodatum.utils.build'; 
 declare namespace pkg="http://expath.org/ns/pkg";
+
 (:~
  : file paths below $src
  : $src typically from resolve-uri
- : @return sequences of relative file paths "content/ebnf/CR-xquery-31-20141218.ebnf" "..."
+ : @return sequences of relative file paths "ff.txt" "..."
  :)
  declare function files($src as xs:string) as xs:string*
  {
@@ -30,10 +31,14 @@ declare %updating  function write-xqdoc($path,$src,$dest){
  
   return  switch($type)
     case "application/xquery"
-      return file:write(
+      return try{
+        file:write(
           fn:resolve-uri($path || ".xml",$dest),
          inspect:xqdoc($url)  
          )
+      }catch *{
+        ()
+      }
     default 
       return ()
 

xar/build.gradle.kts

@@ -0,0 +1,36 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java library project to get you started.
+ * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/9.4.1/userguide/building_java_projects.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the java-library plugin for API and implementation separation.
+    `java-library`
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    // Source: https://mvnrepository.com/artifact/net.coobird/thumbnailator
+    implementation("net.coobird:thumbnailator:0.4.21")
+    // Source: https://mvnrepository.com/artifact/org.basex/basex
+    implementation("org.basex:basex:10.7")
+    // Use JUnit test framework.
+    testImplementation(libs.junit)
+
+   
+    // This dependency is used internally, and not exposed to consumers on their own compile classpath.
+    implementation(libs.guava)
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(11)
+    }
+}

xar/src/main/java/org/expkgzone58/image/Thumbs.java

@@ -0,0 +1,266 @@
+package org.expkgzone58.image;
+
+import static org.basex.query.QueryError.IOERR_X;
+
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+
+import javax.imageio.ImageIO;
+
+import org.basex.data.Data;
+import org.basex.io.IOContent;
+import org.basex.query.QueryException;
+import org.basex.query.QueryModule;
+//import org.basex.query.func.fn.FnTrace;
+import org.basex.query.value.item.B64Lazy;
+import org.basex.query.value.node.ANode;
+import org.basex.util.Token;
+
+import net.coobird.thumbnailator.ThumbnailParameter;
+import net.coobird.thumbnailator.Thumbnailator;
+import net.coobird.thumbnailator.builders.ThumbnailParameterBuilder;
+import net.coobird.thumbnailator.filters.Canvas;
+import net.coobird.thumbnailator.filters.Caption;
+import net.coobird.thumbnailator.filters.Colorize;
+import net.coobird.thumbnailator.filters.Flip;
+import net.coobird.thumbnailator.filters.ImageFilter;
+import net.coobird.thumbnailator.filters.Pipeline;
+import net.coobird.thumbnailator.filters.Rotation;
+import net.coobird.thumbnailator.filters.Watermark;
+import net.coobird.thumbnailator.geometry.AbsoluteSize;
+import net.coobird.thumbnailator.geometry.Position;
+import net.coobird.thumbnailator.geometry.Positions;
+import net.coobird.thumbnailator.geometry.Region;
+import net.coobird.thumbnailator.tasks.StreamThumbnailTask;
+
+/*
+ * BaseX Thumbnailator interface
+ * @author andy bunce
+ * @copyright Quodatum Ltd
+ * @date 2017
+ * @licence Apache 2
+ */
+public class Thumbs extends QueryModule{
+
+    public B64Lazy size(final B64Lazy inputStream, final int width, final int height)
+            throws IOException, QueryException {
+        ByteArrayInputStream is = new ByteArrayInputStream(inputStream.binary(null));
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        ThumbnailParameterBuilder builder = new ThumbnailParameterBuilder();
+        builder.size(width, height);
+        StreamThumbnailTask task = new StreamThumbnailTask(builder.build(), is, os);
+        Thumbnailator.createThumbnail(task);
+        return new B64Lazy(new IOContent(os.toByteArray()), IOERR_X);
+    }
+
+    public B64Lazy scale(final B64Lazy inputStream,
+            final double xscale, final double yscale)
+            throws IOException, QueryException {
+        ByteArrayInputStream is = new ByteArrayInputStream(inputStream.binary(null));
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        ThumbnailParameterBuilder builder = new ThumbnailParameterBuilder();
+        builder.scale(xscale, yscale);
+        StreamThumbnailTask task = new StreamThumbnailTask(builder.build(), is, os);
+        Thumbnailator.createThumbnail(task);
+        return new B64Lazy(new IOContent(os.toByteArray()), IOERR_X);
+    }
+
+    public B64Lazy task(final B64Lazy inputStream, final ANode thumbnail)
+            throws IOException, QueryException {
+        ByteArrayInputStream is = new ByteArrayInputStream(inputStream.binary(null));
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        ThumbnailParameter param = fromNode(thumbnail);
+        StreamThumbnailTask task = new StreamThumbnailTask(param, is, os);
+        Thumbnailator.createThumbnail(task);
+        return new B64Lazy(new IOContent(os.toByteArray()), IOERR_X);
+    }
+
+    // build parameters from XML
+    ThumbnailParameter fromNode(final ANode node) throws QueryException, IOException {
+        ThumbnailParameterBuilder builder = new ThumbnailParameterBuilder();
+        for(final ANode element : node.childIter()) {
+ 
+            if (element.kind() == Data.ELEM) {
+                String name = Token.string(element.name());
+               // FnTrace.trace(name.getBytes(), "element: ".getBytes(), queryContext);
+                switch (name) {
+
+                case "size":
+                   size(builder, element);
+                    break;
+
+                case "scale":
+                    scale(builder, element);
+                     break;
+
+                case "region":
+                    region(builder, element);
+                    break;
+
+                case "constrain":
+                    constrain(builder, element);
+                    break;
+
+                case "filters":
+                    List<ImageFilter> filters = filters(element);
+                    builder.filters(filters);
+                    break;
+
+                case "output":
+                    String format = Utils.attrib(element, "format",
+                            ThumbnailParameter.ORIGINAL_FORMAT);
+                    builder.format(format);
+
+                    break;
+                default:
+                    break;
+                }
+            }
+        }
+        return builder.build();
+    }
+
+    void region(final ThumbnailParameterBuilder builder, final ANode node)
+            throws QueryException {
+
+        int width = Utils.attrib(node,"width", 80);
+        int height = Utils.attrib(node,"height", 80);
+        Dimension d = new Dimension(width, height);
+        Position pos = Utils.position(node, "position", Positions.CENTER);
+        Region r = new Region(pos, new AbsoluteSize(d));
+        builder.region(r);
+    }
+
+    void constrain(final ThumbnailParameterBuilder builder, final ANode node)
+            throws QueryException {
+
+        boolean aspect = Utils.attrib(node, "aspect", true);
+        builder.keepAspectRatio(aspect);
+       // FnTrace.trace(Boolean.toString(aspect).getBytes(), "constrain: ".getBytes(), queryContext);
+        boolean exif = Utils.attrib(node, "exif", true);
+        builder.useExifOrientation(exif);
+
+        boolean fit = Utils.attrib(node, "fit", true);
+        builder.fitWithinDimensions(fit);
+    }
+
+    void size(final ThumbnailParameterBuilder builder, final ANode node)
+            throws QueryException {
+        int width = Utils.attrib(node, "width", 80);
+        int height = Utils.attrib(node, "height", 80);
+        builder.size(width, height);
+    }
+
+    void scale(final ThumbnailParameterBuilder builder, final ANode node)
+            throws QueryException {
+        double x = Utils.attrib(node, "x", 0.5f);
+        double y = Utils.attrib(node, "y", 0.5f);
+        builder.scale(x, y);
+    }
+
+    List<ImageFilter> filters(final ANode filters) throws QueryException, IOException {
+        Pipeline pipeline = new Pipeline();
+        for(final ANode node : filters.childIter()) {
+            if (node.kind() == Data.ELEM) {
+                switch (Token.string(node.name())) {
+
+                case "canvas": // @width @height @color @position
+                    canvas(pipeline, node);
+                    break;
+
+                case "caption": //@color @position text()
+                    caption(pipeline, node);
+                    break;
+
+                case "colorize": //@color @alpha
+                    colorize(pipeline, node);
+                    break;
+
+                case "flip": //@axis
+                    flip(pipeline, node);
+                    break;
+
+                case "rotate": //@angle
+                    rotate(pipeline, node);
+                    break;
+
+                case "watermark": //@src @alpha @position
+                    watermark(pipeline, node);
+                    break;
+
+                default:
+                    break;
+                }
+            }
+        }
+        return pipeline.getFilters();
+    }
+
+    private void watermark(final Pipeline pipeline, final ANode node)
+            throws IOException, QueryException {
+        ImageFilter filter;
+        Position pos;
+        String src = Utils.attrib(node, "src", "");
+        pos = Utils.position(node, "position", Positions.BOTTOM_RIGHT);
+        BufferedImage watermarkImg = ImageIO.read(new File(src));
+        filter = new Watermark(pos, watermarkImg, Utils.attrib(node, "alpha", 0.5f));
+        pipeline.add(filter);
+    }
+
+    private void rotate(final Pipeline pipeline, final ANode node)
+            throws QueryException {
+        double angle = (double) Utils.attrib(node, "angle", 0);
+        pipeline.add(Rotation.newRotator(angle));
+    }
+
+    private void flip(final Pipeline pipeline, final ANode node) throws QueryException {
+        ImageFilter filter;
+        String axis = Utils.attrib(node, "axis", "vertical");
+               // FnTrace.trace(axis.getBytes(), "FLIP: ".getBytes(), queryContext);
+        filter = axis.equalsIgnoreCase("vertical") ? Flip.VERTICAL : Flip.HORIZONTAL;
+        pipeline.add(filter);
+    }
+
+    private void colorize(final Pipeline pipeline, final ANode node) throws QueryException {
+        ImageFilter filter;
+        String color;
+        color = Utils.attrib(node, "color", "black");
+        filter = new Colorize(Utils.stringToColor(color),
+                Utils.attrib(node, "alpha", 0.0f));
+        pipeline.add(filter);
+    }
+
+    private void canvas(final Pipeline pipeline, final ANode node) throws QueryException {
+        ImageFilter filter;
+        String color;
+        Position pos;
+        int width = Utils.attrib(node, "width", 80);
+        int height = Utils.attrib(node, "height", 80);
+        color = Utils.attrib(node, "color", "black");
+        pos = Utils.position(node, "position", Positions.CENTER);
+        filter = new Canvas(width, height, pos, false, Utils.stringToColor(color));
+        pipeline.add(filter);
+    }
+
+    private void caption(final Pipeline pipeline, final ANode node) throws QueryException {
+        ImageFilter filter;
+        String color;
+        Position pos;
+        String text = Token.string(node.string());
+        color = Utils.attrib(node, "color", "black");
+        pos = Utils.position(node, "position", Positions.TOP_CENTER);
+        String fontName = Utils.attrib(node, "font", "SansSerif");
+        int size = Utils.attrib(node, "size", 14);
+        int insets = Utils.attrib(node, "insets", 0);
+        Font font = new Font(fontName, Font.PLAIN, size);
+        filter = new Caption(text, font , Utils.stringToColor(color),
+                pos, insets);
+        pipeline.add(filter);
+    }
+}

xar/src/main/java/org/expkgzone58/image/Utils.java

@@ -0,0 +1,73 @@
+package org.expkgzone58.image;
+
+import java.awt.Color;
+import java.lang.reflect.Field;
+import java.nio.charset.StandardCharsets;
+
+import org.basex.query.QueryException;
+import org.basex.query.value.item.Bln;
+import org.basex.query.value.item.Dbl;
+import org.basex.query.value.item.Int;
+import org.basex.query.value.item.Item;
+import org.basex.query.value.node.ANode;
+import org.basex.util.Token;
+
+import net.coobird.thumbnailator.geometry.Position;
+import net.coobird.thumbnailator.geometry.Positions;
+
+public final class Utils {
+    private Utils() {
+    };
+    // get value from attribute with default
+    public static String attrib(final ANode element, final String name, final String def)
+            throws QueryException {
+        byte[] at = element.attribute(name.getBytes(StandardCharsets.UTF_8));
+        return (at == null) ? def : Token.string(at);
+    }
+
+    public static float attrib(final ANode element, final String name, final float def)
+            throws QueryException {
+        byte[] at = element.attribute(name.getBytes(StandardCharsets.UTF_8));
+        return (at == null) ? def : (float) Dbl.parse(at, null);
+    }
+
+    public static int attrib(final ANode element, final String name, final int def)
+            throws QueryException {
+        byte[] at = element.attribute(name.getBytes(StandardCharsets.UTF_8));
+        return (at == null) ? def : Token.toInt(at);
+    }
+
+    public static boolean attrib(final ANode element, final String name, final boolean def)
+            throws QueryException {
+        byte[] at = element.attribute(name.getBytes(StandardCharsets.UTF_8));
+        return (boolean) ((at == null) ? def : Bln.parse(at));
+    }
+
+    // e.g. TOP_LEFT
+    public static Position position(final ANode element, final String name, final Position def) {
+        byte[] at = element.attribute(name.getBytes(StandardCharsets.UTF_8));
+        return (at == null) ? def : Positions.valueOf(Token.string(at));
+    }
+
+    public static Color stringToColor(final String value) {
+        if (value == null) {
+            return Color.black;
+        }
+        try {
+            // get color by hex or octal value
+            return Color.decode(value);
+        } catch (NumberFormatException nfe) {
+            // if we can't decode lets try to get it by name
+            try {
+                // try to get a color by name using reflection
+                final Field f = Color.class.getField(value);
+
+                return (Color) f.get(null);
+            } catch (Exception ce) {
+                // if we can't get any color return black
+                return Color.black;
+            }
+        }
+    }
+
+}

xar/src/test/java/org/example/LibraryTest.java

@@ -0,0 +1,14 @@
+/*
+ * This source file was generated by the Gradle 'init' task
+ */
+package org.example;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+public class LibraryTest {
+    @Test public void someLibraryMethodReturnsTrue() {
+        Library classUnderTest = new Library();
+        assertTrue("someLibraryMethod should return 'true'", classUnderTest.someLibraryMethod());
+    }
+}