From 204740ca8b46107376631ba6f35042f37d7e1a10 Mon Sep 17 00:00:00 2001
From: Markus Kreth <markus.kreth@web.de>
Date: Sat, 20 Aug 2022 18:15:51 +0200
Subject: [PATCH] different Format Templates

---
 .../de/kreth/property2java/Configuration.java |  5 ++
 .../de/kreth/property2java/Generator.java     | 11 ++-
 .../config/FreemarkerConfig.java              | 35 ++++++---
 .../kreth/property2java/processor/Format.java |  9 +++
 .../GenerateResourceBundleProperty2Java.java  | 46 +++++++++++
 .../GenerateResourceBundleProperty2Javas.java | 21 +++++
 .../processor/ProcessorConfiguration.java     | 23 ++++--
 .../processor/Property2JavaGenerator.java     | 77 +++++++++++++------
 .../enum_template_with_initializer.tpl        | 59 ++++++++++++++
 .../enum_template_with_inner_properties.tpl   | 48 ++++++++++++
 ...late_with_inner_propertyresourcebundle.tpl | 48 ++++++++++++
 11 files changed, 340 insertions(+), 42 deletions(-)
 create mode 100644 src/main/java/de/kreth/property2java/processor/Format.java
 create mode 100644 src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Java.java
 create mode 100644 src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Javas.java
 create mode 100644 src/main/resources/template/enum_template_with_initializer.tpl
 create mode 100644 src/main/resources/template/enum_template_with_inner_properties.tpl
 create mode 100644 src/main/resources/template/enum_template_with_inner_propertyresourcebundle.tpl

diff --git a/src/main/java/de/kreth/property2java/Configuration.java b/src/main/java/de/kreth/property2java/Configuration.java
index 6c1c426..0e19fdf 100644
--- a/src/main/java/de/kreth/property2java/Configuration.java
+++ b/src/main/java/de/kreth/property2java/Configuration.java
@@ -12,6 +12,7 @@ import java.util.Map;
 import org.apache.commons.text.WordUtils;
 
 import de.kreth.property2java.config.Regex;
+import de.kreth.property2java.processor.Format;
 
 public interface Configuration {
 
@@ -23,6 +24,10 @@ public interface Configuration {
      */
     String getPackage();
 
+    default Format getFormat() {
+	return Format.WithUnaryOperatorParameter;
+    }
+
     /**
      * Filename to InputReader Entries
      *
diff --git a/src/main/java/de/kreth/property2java/Generator.java b/src/main/java/de/kreth/property2java/Generator.java
index 38431aa..9bb690b 100644
--- a/src/main/java/de/kreth/property2java/Generator.java
+++ b/src/main/java/de/kreth/property2java/Generator.java
@@ -31,7 +31,7 @@ public class Generator {
     public Generator(Configuration config) {
 	this.config = config;
 	try {
-	    template = FreemarkerConfig.INSTANCE.getTemplate();
+	    template = FreemarkerConfig.INSTANCE.getTemplate(config.getFormat());
 	} catch (IOException e) {
 	    throw new IllegalStateException("Unable to load freemarker template", e);
 	}
@@ -62,6 +62,7 @@ public class Generator {
 	root.put("generation_date", dateTimeInstance.format(new Date()));
 	root.put("package", config.getPackage());
 	root.put("fileName", fileName);
+	root.put("bundle_base_name", fileName.substring(0, min(fileName.length(), fileName.lastIndexOf('.'))));
 	root.put("classname", config.mapFilenameToClassName(fileName));
 
 	List<Entry> entries = new ArrayList<>();
@@ -81,6 +82,14 @@ public class Generator {
 	template.process(root, out);
     }
 
+    int min(int a, int b) {
+	int result = Math.min(a, b);
+	if (result < 0) {
+	    result = Math.max(a, b);
+	}
+	return result;
+    }
+
     public static void main(String[] args) throws IOException, GeneratorException {
 	Generator generator = new Generator(ArgumentConfiguration.parse(args));
 	generator.start();
diff --git a/src/main/java/de/kreth/property2java/config/FreemarkerConfig.java b/src/main/java/de/kreth/property2java/config/FreemarkerConfig.java
index 4a66f9f..f994279 100644
--- a/src/main/java/de/kreth/property2java/config/FreemarkerConfig.java
+++ b/src/main/java/de/kreth/property2java/config/FreemarkerConfig.java
@@ -2,23 +2,36 @@ package de.kreth.property2java.config;
 
 import java.io.IOException;
 
+import de.kreth.property2java.processor.Format;
 import freemarker.template.Configuration;
 import freemarker.template.Template;
 
 public enum FreemarkerConfig {
 
-	INSTANCE;
-
-	private final Configuration cfg;
-
-	public Template getTemplate() throws IOException {
-		return cfg.getTemplate("enum_template.tpl");
+    INSTANCE;
+
+    private final Configuration cfg;
+
+    public Template getTemplate(Format format) throws IOException {
+	switch (format) {
+	case WithInitializer:
+	    return cfg.getTemplate("enum_template_with_initializer.tpl");
+	case WithInnerPropertyLoader:
+	    return cfg.getTemplate("enum_template_with_inner_properties.tpl");
+	case WithInnerPropertyResourceBundle:
+	    return cfg.getTemplate("enum_template_with_inner_propertyresourcebundle.tpl");
+	case WithUnaryOperatorParameter:
+	    return cfg.getTemplate("enum_template.tpl");
+	default:
+	    throw new IllegalArgumentException("Format " + format + " is not supported.");
 	}
 
-	private FreemarkerConfig() {
-		cfg = new Configuration(Configuration.VERSION_2_3_28);
-		cfg.setClassForTemplateLoading(this.getClass(), "/template/");
-		cfg.setDefaultEncoding("UTF-8");
-	}
+    }
+
+    private FreemarkerConfig() {
+	cfg = new Configuration(Configuration.VERSION_2_3_28);
+	cfg.setClassForTemplateLoading(this.getClass(), "/template/");
+	cfg.setDefaultEncoding("UTF-8");
+    }
 
 }
diff --git a/src/main/java/de/kreth/property2java/processor/Format.java b/src/main/java/de/kreth/property2java/processor/Format.java
new file mode 100644
index 0000000..a0d271c
--- /dev/null
+++ b/src/main/java/de/kreth/property2java/processor/Format.java
@@ -0,0 +1,9 @@
+package de.kreth.property2java.processor;
+
+public enum Format {
+
+    WithUnaryOperatorParameter,
+    WithInnerPropertyResourceBundle,
+    WithInnerPropertyLoader,
+    WithInitializer
+}
diff --git a/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Java.java b/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Java.java
new file mode 100644
index 0000000..69c7275
--- /dev/null
+++ b/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Java.java
@@ -0,0 +1,46 @@
+package de.kreth.property2java.processor;
+
+import static java.lang.annotation.ElementType.TYPE;
+
+import java.lang.annotation.Repeatable;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target(TYPE)
+@Retention(RetentionPolicy.SOURCE)
+@Repeatable(value = GenerateResourceBundleProperty2Javas.class)
+/**
+ * Für die konfigurierten Resourcen wird jeweils eine Java Klasse erzeugt. Es
+ * muss nur die Abhängigkeit eingebunden werden und die Annotation in einer
+ * Klasse verwendet werden, in deren Package die neuen Klassen generiert werden.
+ * Wenn mehrere Resourcen verarbeitet werden sollen, kann diese Annotation
+ * mehrfach parallel angegeben werden.
+ *
+ * Für die Ausgabe der Prozessornachrichten muss folgendes im maven compiler
+ * konfiguriert werden:
+ *
+ * <pre>
+&lt;build&gt;
+	&lt;plugins&gt;
+		&lt;plugin&gt;
+			&lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
+			&lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
+			&lt;version&gt;3.8.0&lt;/version&gt;
+			&lt;configuration&gt;
+				&lt;release&gt;${java.version}&lt;/release&gt;
+				<b>&lt;showWarnings&gt;true&lt;/showWarnings&gt;</b>
+			&lt;/configuration&gt;
+		&lt;/plugin&gt;
+	&lt;/plugins&gt;
+&lt;/build&gt;
+ * </pre>
+ *
+ * @author Markus
+ *
+ */
+public @interface GenerateResourceBundleProperty2Java {
+    String resource();
+
+    Format format();
+}
diff --git a/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Javas.java b/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Javas.java
new file mode 100644
index 0000000..d879f60
--- /dev/null
+++ b/src/main/java/de/kreth/property2java/processor/GenerateResourceBundleProperty2Javas.java
@@ -0,0 +1,21 @@
+package de.kreth.property2java.processor;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * Diese Annotation sollte nicht verwendet werden. Sie sammelt nur
+ * {@link GenerateResourceBundleProperty2Java} wenn diese mehrfach verwendet
+ * wird.
+ *
+ * @author Markus
+ *
+ */
+@Target(ElementType.TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+public @interface GenerateResourceBundleProperty2Javas {
+
+    GenerateResourceBundleProperty2Java[] value();
+}
diff --git a/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java b/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
index 13e59ce..a6f5de2 100644
--- a/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
+++ b/src/main/java/de/kreth/property2java/processor/ProcessorConfiguration.java
@@ -9,6 +9,7 @@ import java.util.Arrays;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 
 import javax.annotation.processing.Filer;
 import javax.lang.model.element.Element;
@@ -26,17 +27,16 @@ public class ProcessorConfiguration implements Configuration {
     private final Filer filer;
     private final Element element;
     private final Map<String, Reader> input;
+    private final Format format;
 
     ProcessorConfiguration(Builder builder) throws IOException {
 	this.filer = builder.filer;
 	this.element = builder.element;
+	this.format = Objects.requireNonNullElse(builder.format, Format.WithUnaryOperatorParameter);
 	this.input = new HashMap<>();
 	for (String resource : builder.resourcenames) {
-
-	    FileObject ressource = filer.getResource(StandardLocation.CLASS_PATH, "",
-		    resource);
-	    String className = mapFilenameToClassName(resource);
-	    input.put(className, ressource.openReader(false));
+	    FileObject ressource = filer.getResource(StandardLocation.CLASS_PATH, "", resource);
+	    input.put(resource, ressource.openReader(false));
 	}
     }
 
@@ -52,6 +52,11 @@ public class ProcessorConfiguration implements Configuration {
 	return packageName;
     }
 
+    @Override
+    public Format getFormat() {
+	return format;
+    }
+
     @Override
     public Map<String, Reader> getInput() {
 	return input;
@@ -67,7 +72,7 @@ public class ProcessorConfiguration implements Configuration {
     public Writer outWriter(String fileName) throws IOException {
 	String packageName = getPackage();
 	if (packageName != null && !packageName.isBlank()) {
-	    fileName = packageName + "." + fileName;
+	    fileName = packageName + "." + mapFilenameToClassName(fileName);
 	}
 	return filer.createSourceFile(fileName, element).openWriter();
     }
@@ -80,6 +85,7 @@ public class ProcessorConfiguration implements Configuration {
 	private final Filer filer;
 	private final Element element;
 	private final List<String> resourcenames;
+	private Format format = Format.WithUnaryOperatorParameter;
 
 	private Builder(Filer filer, Element element) {
 	    this.filer = filer;
@@ -87,6 +93,11 @@ public class ProcessorConfiguration implements Configuration {
 	    this.resourcenames = new ArrayList<>();
 	}
 
+	public Builder withFormat(Format format) {
+	    this.format = format;
+	    return this;
+	}
+
 	public Builder addAll(String[] resourceNames) {
 	    this.resourcenames.addAll(Arrays.asList(resourceNames));
 	    return this;
diff --git a/src/main/java/de/kreth/property2java/processor/Property2JavaGenerator.java b/src/main/java/de/kreth/property2java/processor/Property2JavaGenerator.java
index b89faf2..3273f32 100644
--- a/src/main/java/de/kreth/property2java/processor/Property2JavaGenerator.java
+++ b/src/main/java/de/kreth/property2java/processor/Property2JavaGenerator.java
@@ -4,6 +4,7 @@ import java.io.IOException;
 import java.io.PrintWriter;
 import java.io.StringWriter;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Set;
 
 import javax.annotation.processing.AbstractProcessor;
@@ -17,7 +18,9 @@ import javax.tools.Diagnostic.Kind;
 
 import de.kreth.property2java.GeneratorException;
 
-@SupportedAnnotationTypes({ "de.kreth.property2java.processor.GenerateProperty2Java" })
+@SupportedAnnotationTypes({ "de.kreth.property2java.processor.GenerateProperty2Java",
+	"de.kreth.property2java.processor.GenerateResourceBundleProperty2Javas",
+	"de.kreth.property2java.processor.GenerateResourceBundleProperty2Java" })
 @SupportedSourceVersion(SourceVersion.RELEASE_8)
 public class Property2JavaGenerator extends AbstractProcessor {
 
@@ -25,37 +28,63 @@ public class Property2JavaGenerator extends AbstractProcessor {
     public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
 
 	if (!roundEnv.processingOver()) {
-	    processingEnv.getMessager().printMessage(Kind.NOTE,
-		    "Processing annotation " + GenerateProperty2Java.class);
-
-	    Set<? extends Element> elementsAnnotatedWith = roundEnv
-		    .getElementsAnnotatedWith(GenerateProperty2Java.class);
-
-	    processElements(elementsAnnotatedWith);
+	    processGenerateProperty2Java(roundEnv);
+	    processGenerateResourceBundleProperty2Javas(roundEnv);
 	} else {
 	    processingEnv.getMessager().printMessage(Kind.NOTE,
-		    "finished working on annotation " + GenerateProperty2Java.class);
+		    "finished working on annotation " + annotations);
 	}
 	return true;
     }
 
-    private void processElements(Set<? extends Element> elementsAnnotatedWith) {
+    private void processGenerateProperty2Java(RoundEnvironment roundEnv) {
+	processingEnv.getMessager().printMessage(Kind.NOTE,
+		"Processing annotation " + GenerateProperty2Java.class);
+
+	Set<? extends Element> elementsAnnotatedWith = roundEnv
+		.getElementsAnnotatedWith(GenerateProperty2Java.class);
+
 	for (Element element : elementsAnnotatedWith) {
-	    String[] resources = element.getAnnotation(GenerateProperty2Java.class).resources();
-	    processingEnv.getMessager().printMessage(Kind.NOTE,
-		    "Generating Java for " + Arrays.asList(resources));
-	    try {
-		ProcessorConfiguration
-			.builder(processingEnv.getFiler(), element)
-			.addAll(resources)
-			.startGeneration();
-	    } catch (IOException | GeneratorException e) {
-		StringWriter out = new StringWriter();
-		e.printStackTrace(new PrintWriter(out));
-		out.flush();
-		processingEnv.getMessager().printMessage(Kind.ERROR, "Exception " + e + "\n" + out.toString(),
-			element);
+	    GenerateProperty2Java generateAnnotation = element.getAnnotation(GenerateProperty2Java.class);
+	    String[] resources = generateAnnotation.resources();
+	    generateElementProperties(element, Arrays.asList(resources), Format.WithUnaryOperatorParameter);
+	}
+    }
+
+    private void processGenerateResourceBundleProperty2Javas(RoundEnvironment roundEnv) {
+
+	processingEnv.getMessager().printMessage(Kind.NOTE,
+		"Processing annotation " + GenerateResourceBundleProperty2Javas.class);
+
+	Set<? extends Element> elementsAnnotatedWith = roundEnv
+		.getElementsAnnotatedWith(GenerateResourceBundleProperty2Javas.class);
+
+	for (Element element : elementsAnnotatedWith) {
+	    GenerateResourceBundleProperty2Java[] value = element
+		    .getAnnotation(GenerateResourceBundleProperty2Javas.class).value();
+	    for (GenerateResourceBundleProperty2Java generateResourceBundleProperty2Java : value) {
+		List<String> resources = Arrays.asList(generateResourceBundleProperty2Java.resource());
+		generateElementProperties(element, resources, generateResourceBundleProperty2Java.format());
 	    }
 	}
     }
+
+    private void generateElementProperties(Element element, List<String> resources, Format format) {
+	processingEnv.getMessager().printMessage(Kind.NOTE,
+		"Generating Java for " + Arrays.asList(resources));
+	try {
+	    ProcessorConfiguration
+		    .builder(processingEnv.getFiler(), element)
+		    .addAll(resources)
+		    .withFormat(format)
+		    .startGeneration();
+	} catch (IOException | GeneratorException e) {
+	    StringWriter out = new StringWriter();
+	    e.printStackTrace(new PrintWriter(out));
+	    out.flush();
+	    processingEnv.getMessager().printMessage(Kind.ERROR, "Exception " + e + "\n" + out.toString(),
+		    element);
+	}
+    }
+
 }
diff --git a/src/main/resources/template/enum_template_with_initializer.tpl b/src/main/resources/template/enum_template_with_initializer.tpl
new file mode 100644
index 0000000..ab44e1b
--- /dev/null
+++ b/src/main/resources/template/enum_template_with_initializer.tpl
@@ -0,0 +1,59 @@
+<#if package??>package ${package};
+
+</#if>import java.util.Properties;
+import java.util.ResourceBundle;
+import java.util.function.UnaryOperator;
+
+import javax.annotation.processing.Generated;
+
+/**
+ * Property keys from ${fileName}
+ */
+@Generated(date = "${generation_date}", value = "${generator_name}")
+public enum ${classname} {
+
+<#list entries as e>
+	/**
+	 * ${e.key} = "${e.value}"
+	 */
+	${e.constant} ("${e.key}")<#sep>,
+</#sep>
+</#list>;
+    private static UnaryOperator<String> function;
+	private final String value;
+
+	private ${classname} (String value) {
+		this.value = value;
+	}
+	
+	public static void init(UnaryOperator<String> resourceFunction) {
+		function = resourceFunction;
+	}
+	
+	/**
+	 * Represented Key in property File.
+	 * @return key
+	 */
+	public String getValue() {
+		return value;
+	}
+
+	/**
+	* Resolves the value for this key. 
+	* {@link #init(UnaryOperator<String>)} must be called before.
+	*/
+	public String getText() {
+		return function.apply(value);
+	}
+	
+	/**
+	 * Resolves the value for this key from the parameter function.
+	 * <p>
+	 * e.g. <code>${classname}.getString(resBundle::getString)</code>
+	 * @param resourceFunction {@link Properties#getProperty(String)} or {@link ResourceBundle#getString(String)}
+	 * @return
+	 */
+	public String getString(UnaryOperator<String> resourceFunction) {
+		return resourceFunction.apply(value);
+	}
+}
diff --git a/src/main/resources/template/enum_template_with_inner_properties.tpl b/src/main/resources/template/enum_template_with_inner_properties.tpl
new file mode 100644
index 0000000..d3955af
--- /dev/null
+++ b/src/main/resources/template/enum_template_with_inner_properties.tpl
@@ -0,0 +1,48 @@
+<#if package??>package ${package};
+
+</#if>import java.util.Properties;
+import java.util.PropertyResourceBundle;
+import java.util.ResourceBundle;
+import java.util.function.UnaryOperator;
+
+import javax.annotation.processing.Generated;
+
+/**
+ * Property keys from ${fileName}
+ */
+@Generated(date = "${generation_date}", value = "${generator_name}")
+public enum ${classname} {
+
+<#list entries as e>
+	/**
+	 * ${e.key} = "${e.value}"
+	 */
+	${e.constant} ("${e.key}")<#sep>,
+</#sep>
+</#list>;
+
+	private final String value;
+
+	private ${classname} (String value) {
+		this.value = value;
+	}
+
+	/**
+	 * Represented Key in property File.
+	 * @return key
+	 */
+	public String getValue() {
+		return value;
+	}
+
+    private static ResourceBundle bundle = PropertyResourceBundle.getBundle("${bundle_base_name}");
+
+	/**
+	 * The Text for this Key from PropertyResourceBundle
+	 * @return human readable text
+	 */
+    public String getText() {
+		return bundle.getString(value);
+    }
+
+}
diff --git a/src/main/resources/template/enum_template_with_inner_propertyresourcebundle.tpl b/src/main/resources/template/enum_template_with_inner_propertyresourcebundle.tpl
new file mode 100644
index 0000000..d3955af
--- /dev/null
+++ b/src/main/resources/template/enum_template_with_inner_propertyresourcebundle.tpl
@@ -0,0 +1,48 @@
+<#if package??>package ${package};
+
+</#if>import java.util.Properties;
+import java.util.PropertyResourceBundle;
+import java.util.ResourceBundle;
+import java.util.function.UnaryOperator;
+
+import javax.annotation.processing.Generated;
+
+/**
+ * Property keys from ${fileName}
+ */
+@Generated(date = "${generation_date}", value = "${generator_name}")
+public enum ${classname} {
+
+<#list entries as e>
+	/**
+	 * ${e.key} = "${e.value}"
+	 */
+	${e.constant} ("${e.key}")<#sep>,
+</#sep>
+</#list>;
+
+	private final String value;
+
+	private ${classname} (String value) {
+		this.value = value;
+	}
+
+	/**
+	 * Represented Key in property File.
+	 * @return key
+	 */
+	public String getValue() {
+		return value;
+	}
+
+    private static ResourceBundle bundle = PropertyResourceBundle.getBundle("${bundle_base_name}");
+
+	/**
+	 * The Text for this Key from PropertyResourceBundle
+	 * @return human readable text
+	 */
+    public String getText() {
+		return bundle.getString(value);
+    }
+
+}