Refactoring and added sql Helper

core/pom.xml

@@ -10,7 +10,7 @@
         <version>1.0-SNAPSHOT</version>
     </parent>
 
-    <artifactId>inject</artifactId>
+    <artifactId>core</artifactId>
 
     <properties>
         <!-- Application Properties -->

core/src/main/java/de/neitzel/core/inject/InjectableComponentScanner.java

@@ -1,6 +1,6 @@
-package de.neitzel.inject;
+package de.neitzel.core.inject;
 
-import de.neitzel.inject.annotation.Component;
+import de.neitzel.core.inject.annotation.Component;
 import org.reflections.Reflections;
 
 import java.lang.reflect.Constructor;

core/src/main/java/de/neitzel/core/inject/annotation/Component.java

@@ -1,4 +1,4 @@
-package de.neitzel.inject.annotation;
+package de.neitzel.core.inject.annotation;
 
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;

core/src/main/java/de/neitzel/core/inject/annotation/Config.java

@@ -1,4 +1,4 @@
-package de.neitzel.inject.annotation;
+package de.neitzel.core.inject.annotation;
 
 import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;

core/src/main/java/de/neitzel/core/sql/Query.java

@@ -0,0 +1,231 @@
+package de.neitzel.core.sql;
+
+import lombok.RequiredArgsConstructor;
+import lombok.SneakyThrows;
+import lombok.extern.slf4j.Slf4j;
+
+import java.nio.charset.StandardCharsets;
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.*;
+import java.util.function.Function;
+import java.util.stream.Stream;
+import java.util.stream.StreamSupport;
+
+/**
+ * Helper class to build and execute parameterized SQL queries with factory-based result mapping.
+ */
+@Slf4j
+@RequiredArgsConstructor
+public class Query<T> {
+
+  /**
+   * An Integer Factory that can be used to read Integer Values of a ResultSet that only has Integers (e.g. a min oder max query)
+   */
+  public static final Function<ResultSet, Integer> INTEGER_FACTORY = rs -> {
+    try {
+      return rs.getInt(1);
+    } catch (SQLException e) {
+      throw new RuntimeException(e);
+    }
+  };
+
+  private final Connection connection;
+  private final List<ParameterSetter> parameterSetters = new ArrayList<>();
+  private Function<ResultSet, T> factory;
+  private String queryText;
+
+  public static void execute(final Connection connection, final String query) throws SQLException {
+    new Query<Object>(connection)
+        .setQueryText(query)
+        .execute();
+  }
+
+  /**
+   * sets the query.
+   */
+  public Query<T> setQueryText(final String queryText) {
+    this.queryText = queryText;
+    return this;
+  }
+
+  /**
+   * Loads the query content from a resource URL.
+   */
+  public Query<T> setQueryResource(final String resourcePath) {
+    log.info("loading resource: {}", resourcePath);
+    try (Scanner scanner = new Scanner(Objects.requireNonNull(getClass().getResourceAsStream(resourcePath)),
+        StandardCharsets.UTF_8)) {
+      this.queryText = scanner.useDelimiter("\\A").next();
+    }
+    log.info("query text: {}", this.queryText);
+    return this;
+  }
+
+  /**
+   * Replaces placeholders in the query.
+   */
+  public Query<T> replace(final String placeholder, final String value) {
+    this.queryText = this.queryText.replace(placeholder, value);
+    log.info("query text: {}", this.queryText);
+    return this;
+  }
+
+  /**
+   * Adds another parameter setter
+   *
+   * @param index  Index of parameter in prepared statement
+   * @param value  Value to set.
+   * @param setter Setter to use on prepared statement.
+   * @param <X>    Type of the Parameter.
+   * @return The Query.
+   */
+  public <X> Query<T> addParameter(final int index, final X value, final TriSqlFunction<PreparedStatement, Integer, X> setter) {
+    parameterSetters.add(ps -> setter.apply(ps, index, value));
+    return this;
+  }
+
+  /**
+   * Adds a ParameterSetter/
+   *
+   * @param setter Setter for a parameter.
+   * @return the Qyery.
+   */
+  public Query<T> addParameter(ParameterSetter setter) {
+    parameterSetters.add(setter);
+    return this;
+  }
+
+  /**
+   * Adds a result factory by name.
+   */
+  public Query<T> factory(final Function<ResultSet, T> factory) {
+    this.factory = factory;
+    return this;
+  }
+
+  /**
+   * Executes the query and returns a stream of results. This Stream must be closed so that the underlying ResultSet is closed.
+   */
+  private Stream<T> stream() throws SQLException {
+    ResultSet rs = createPreparedStatement().executeQuery();
+    TrimmingResultSet trimmingResultSet = new TrimmingResultSet(rs);
+    return streamFromResultSet(trimmingResultSet, factory);
+  }
+
+  /**
+   * Creates a PreparedStatement and applies all Parameter.
+   *
+   * @return the created PreparedStatement
+   * @throws SQLException thrown if the PreparedStatement could not be created.
+   */
+  private PreparedStatement createPreparedStatement() throws SQLException {
+    PreparedStatement ps = connection.prepareStatement(queryText);
+    for (ParameterSetter setter : parameterSetters) {
+      setter.apply(ps);
+    }
+    return ps;
+  }
+
+  /**
+   * Executes a query wich has no result.
+   *
+   * @throws SQLException Thrown when query cannot be executed.
+   */
+  public void execute() throws SQLException {
+    try (PreparedStatement ps = createPreparedStatement()) {
+      ps.execute();
+    }
+  }
+
+  /**
+   * Streams the results of a ResultSet using a factory that creates instances for each row of the ResultSet
+   *
+   * @param rs      ResultSet to stream from
+   * @param factory Factory to create instances of T.
+   * @return Stream of T instances.
+   */
+  private Stream<T> streamFromResultSet(final ResultSet rs, final Function<ResultSet, T> factory) {
+    Iterator<T> iterator = new Iterator<>() {
+      private boolean hasNextChecked = false;
+      private boolean hasNext;
+
+      @Override
+      @SneakyThrows
+      public boolean hasNext() {
+        if (!hasNextChecked) {
+          hasNext = rs.next();
+          hasNextChecked = true;
+        }
+        return hasNext;
+      }
+
+      @Override
+      public T next() {
+        if (!hasNext()) {
+          throw new NoSuchElementException();
+        }
+        hasNextChecked = false;
+        return factory.apply(rs);
+      }
+    };
+    Spliterator<T> spliterator = Spliterators.spliteratorUnknownSize(iterator, Spliterator.ORDERED);
+    return StreamSupport.stream(spliterator, false)
+        .onClose(() -> {
+          try {
+            rs.getStatement().close();
+          } catch (SQLException ignored) {
+            // Exception is ignored.
+          }
+          try {
+            rs.close();
+          } catch (SQLException ignored) {
+            // Exception is ignored.
+          }
+        });
+  }
+
+  public <R> R withStream(Function<Stream<T>, R> handler) throws SQLException {
+    try (Stream<T> stream = stream()) {
+      return handler.apply(stream);
+    }
+  }
+
+  /**
+   * Function with three parameters and no result which can throw an SQLException
+   *
+   * @param <T> type of first parameter
+   * @param <U> type of second parameter
+   * @param <V> type of third parameter
+   */
+  @FunctionalInterface
+  public interface TriSqlFunction<T, U, V> {
+
+    /**
+     * Calls the thre parameter function.
+     *
+     * @param t first parameter.
+     * @param u second parameter.
+     * @param v third parameter.
+     * @throws SQLException Function could throw an SQLException.
+     */
+    void apply(T t, U u, V v) throws SQLException;
+  }
+
+  /**
+   * ParameterSetter is a function Interface that could be used to alter a PreparedStatement.
+   */
+  @FunctionalInterface
+  public interface ParameterSetter {
+
+    /**
+     * Does the required work on PreparedStatement.
+     *
+     * @param ps PreparedStatement to work on.
+     * @throws SQLException Could be thrown when working on PreparedStatement.
+     */
+    void apply(PreparedStatement ps) throws SQLException;
+  }
+}

core/src/test/java/de/neitzel/core/inject/InjectableComponentScannerTest.java

@@ -1,11 +1,10 @@
-package de.neitzel.fx.injectfx;
+package de.neitzel.core.inject;
 
-import de.neitzel.fx.injectfx.testcomponents.test1ok.SuperClass;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.TestComponent1_1;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.TestInterface1_1;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.TestInterface1_2;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.sub.TestComponent1_2;
-import de.neitzel.inject.InjectableComponentScanner;
+import de.neitzel.core.inject.testcomponents.test1ok.SuperClass;
+import de.neitzel.core.inject.testcomponents.test1ok.TestComponent1_1;
+import de.neitzel.core.inject.testcomponents.test1ok.TestInterface1_1;
+import de.neitzel.core.inject.testcomponents.test1ok.TestInterface1_2;
+import de.neitzel.core.inject.testcomponents.test1ok.sub.TestComponent1_2;
 import org.junit.jupiter.api.Test;
 
 import static org.junit.jupiter.api.Assertions.*;
@@ -17,7 +16,7 @@ class InjectableComponentScannerTest {
      */
     @Test
     void testLoadComponents() {
-        InjectableComponentScanner scanner = new InjectableComponentScanner("de.neitzel.injectfx.testcomponents.test1ok");
+        InjectableComponentScanner scanner = new InjectableComponentScanner("de.neitzel.core.inject.testcomponents.test1ok");
         var instantiableComponents = scanner.getInstantiableComponents();
         var nonUniqueTypes = scanner.getNotUniqueTypes();
 
@@ -38,7 +37,7 @@ class InjectableComponentScannerTest {
      */
     @Test
     void testComponentsFailWithUnknownParameters() {
-        InjectableComponentScanner scanner = new InjectableComponentScanner("de.neitzel.injectfx.testcomponents.test2fail");
+        InjectableComponentScanner scanner = new InjectableComponentScanner("de.neitzel.core.inject.testcomponents.test2fail");
         var instantiableComponents = scanner.getInstantiableComponents();
         var nonUniqueTypes = scanner.getNotUniqueTypes();
 

core/src/test/java/de/neitzel/core/inject/testcomponents/test1ok/SuperClass.java

@@ -0,0 +1,4 @@
+package de.neitzel.core.inject.testcomponents.test1ok;
+
+public class SuperClass {
+}

core/src/test/java/de/neitzel/core/inject/testcomponents/test1ok/TestComponent1_1.java

@@ -1,6 +1,6 @@
-package de.neitzel.fx.injectfx.testcomponents.test1ok;
+package de.neitzel.core.inject.testcomponents.test1ok;
 
-import de.neitzel.inject.annotation.Component;
+import de.neitzel.core.inject.annotation.Component;
 
 @Component
 public class TestComponent1_1 extends SuperClass implements TestInterface1_2 {

core/src/test/java/de/neitzel/core/inject/testcomponents/test1ok/TestInterface1_1.java

@@ -0,0 +1,4 @@
+package de.neitzel.core.inject.testcomponents.test1ok;
+
+public interface TestInterface1_1 {
+}

core/src/test/java/de/neitzel/core/inject/testcomponents/test1ok/TestInterface1_2.java

@@ -0,0 +1,4 @@
+package de.neitzel.core.inject.testcomponents.test1ok;
+
+public interface TestInterface1_2 {
+}

core/src/test/java/de/neitzel/core/inject/testcomponents/test1ok/sub/TestComponent1_2.java

@@ -0,0 +1,12 @@
+package de.neitzel.core.inject.testcomponents.test1ok.sub;
+
+import de.neitzel.core.inject.testcomponents.test1ok.SuperClass;
+import de.neitzel.core.inject.testcomponents.test1ok.TestInterface1_1;
+import de.neitzel.core.inject.testcomponents.test1ok.TestInterface1_2;
+import de.neitzel.core.inject.annotation.Component;
+
+@Component
+public class TestComponent1_2 extends SuperClass implements TestInterface1_1, TestInterface1_2 {
+    public TestComponent1_2() {
+    }
+}

core/src/test/java/de/neitzel/core/inject/testcomponents/test2fail/TestComponent2_1.java

@@ -1,6 +1,6 @@
-package de.neitzel.fx.injectfx.testcomponents.test2fail;
+package de.neitzel.core.inject.testcomponents.test2fail;
 
-import de.neitzel.inject.annotation.Component;
+import de.neitzel.core.inject.annotation.Component;
 
 /**
  * TestComponent1 that should fail.

fx-example/pom.xml

@@ -16,7 +16,7 @@
         <link.name>${project.artifactId}</link.name>
         <launcher>${project.artifactId}</launcher>
         <appName>${project.artifactId}</appName>
-        <main.class>de.neitzel.fx.injectfx.example.Main</main.class>
+        <main.class>de.neitzel.core.fx.injectfx.example.Main</main.class>
         <jar.filename>${project.artifactId}-${project.version}</jar.filename>
     </properties>
 

fx-example/src/main/java/de/neitzel/core/fx/component/example/Address.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component.example;
+package de.neitzel.core.fx.component.example;
 
 import lombok.Getter;
 import lombok.Setter;

fx-example/src/main/java/de/neitzel/core/fx/component/example/ExampleApp.java

@@ -1,6 +1,6 @@
-package de.neitzel.fx.component.example;
+package de.neitzel.core.fx.component.example;
 
-import de.neitzel.fx.component.ComponentLoader;
+import de.neitzel.core.fx.component.ComponentLoader;
 import javafx.application.Application;
 import javafx.scene.Parent;
 import javafx.scene.Scene;

fx-example/src/main/java/de/neitzel/core/fx/component/example/Main.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component.example;
+package de.neitzel.core.fx.component.example;
 
 /**
  * Another Main class as workaround when the JavaFX Application ist started without

fx-example/src/main/java/de/neitzel/core/fx/component/example/Person.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component.example;
+package de.neitzel.core.fx.component.example;
 
 import lombok.Getter;
 import lombok.Setter;

fx-example/src/main/java/de/neitzel/core/fx/injectfx/example/JavaFXApp.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.injectfx.example;
+package de.neitzel.core.fx.injectfx.example;
 
 import javafx.application.Application;
 import javafx.fxml.FXMLLoader;

fx-example/src/main/java/de/neitzel/core/fx/injectfx/example/Main.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.injectfx.example;
+package de.neitzel.core.fx.injectfx.example;
 
 /**
  * Another Main class as workaround when the JavaFX Application ist started without

fx-example/src/main/java/de/neitzel/core/fx/injectfx/example/MainWindow.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.injectfx.example;
+package de.neitzel.core.fx.injectfx.example;
 
 import javafx.event.ActionEvent;
 import javafx.fxml.FXML;

fx-example/src/main/resources/address.fxml

@@ -6,7 +6,7 @@
 <AnchorPane xmlns="http://javafx.com/javafx"
             xmlns:fx="http://javafx.com/fxml"
             xmlns:nfx="http://example.com/nfx"
-            fx:controller="de.neitzel.fx.component.ComponentController"
+            fx:controller="de.neitzel.core.fx.component.ComponentController"
             prefWidth="300" prefHeight="100">
     <children>
         <TextField layoutX="10" layoutY="10" prefWidth="280"

fx-example/src/main/resources/de/neitzel/core/fx/injectfx/example/MainWindow.fxml

@@ -3,7 +3,7 @@
 <?import javafx.scene.control.*?>
 <?import javafx.scene.layout.*?>
 
-<AnchorPane prefHeight="127.0" prefWidth="209.0" xmlns="http://javafx.com/javafx/17.0.2-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.neitzel.fx.injectfx.example.MainWindow">
+<AnchorPane prefHeight="127.0" prefWidth="209.0" xmlns="http://javafx.com/javafx/17.0.2-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="de.neitzel.core.fx.injectfx.example.MainWindow">
    <children>
       <Button fx:id="button" layoutX="44.0" layoutY="70.0" mnemonicParsing="false" onAction="#onButtonClick" text="Click Me" />
       <TextField fx:id="textField" layoutX="14.0" layoutY="24.0" />

fx-example/src/main/resources/person.fxml

@@ -6,7 +6,7 @@
 <AnchorPane xmlns="http://javafx.com/javafx"
             xmlns:fx="http://javafx.com/fxml"
             xmlns:nfx="http://example.com/nfx"
-            fx:controller="de.neitzel.fx.component.ComponentController"
+            fx:controller="de.neitzel.core.fx.component.ComponentController"
             prefWidth="300" prefHeight="180">
     <children>
         <TextField layoutX="10" layoutY="10" prefWidth="280"

fx/pom.xml

@@ -17,14 +17,13 @@
         <link.name>${project.artifactId}</link.name>
         <launcher>${project.artifactId}</launcher>
         <appName>${project.artifactId}</appName>
-        <main.class>example.de.neitzel.fx.injectfx.Main</main.class>
         <jar.filename>${project.artifactId}-${project.version}</jar.filename>
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>de.neitzel.lib</groupId>
-            <artifactId>inject</artifactId>
+            <artifactId>core</artifactId>
             <version>1.0-SNAPSHOT</version>
         </dependency>
         <dependency>

fx/src/main/java/de/neitzel/core/fx/component/AutoViewModel.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component;
+package de.neitzel.core.fx.component;
 
 import javafx.beans.property.*;
 import java.lang.reflect.*;

fx/src/main/java/de/neitzel/core/fx/component/ComponentController.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component;
+package de.neitzel.core.fx.component;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;

fx/src/main/java/de/neitzel/core/fx/component/ComponentLoader.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.component;
+package de.neitzel.core.fx.component;
 
 import javafx.beans.property.Property;
 import javafx.fxml.FXMLLoader;

fx/src/main/java/de/neitzel/core/fx/injectfx/FXMLComponentInstances.java

@@ -1,6 +1,6 @@
-package de.neitzel.fx.injectfx;
+package de.neitzel.core.fx.injectfx;
 
-import de.neitzel.inject.InjectableComponentScanner;
+import de.neitzel.core.inject.InjectableComponentScanner;
 
 import java.lang.reflect.Constructor;
 import java.util.*;

fx/src/main/java/de/neitzel/core/fx/injectfx/InjectingControllerFactory.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.injectfx;
+package de.neitzel.core.fx.injectfx;
 
 import javafx.util.Callback;
 

fx/src/main/java/de/neitzel/core/fx/injectfx/InjectingFXMLLoader.java

@@ -1,6 +1,6 @@
-package de.neitzel.fx.injectfx;
+package de.neitzel.core.fx.injectfx;
 
-import de.neitzel.inject.InjectableComponentScanner;
+import de.neitzel.core.inject.InjectableComponentScanner;
 import javafx.fxml.FXMLLoader;
 import lombok.extern.slf4j.Slf4j;
 

fx/src/main/java/de/neitzel/core/fx/mvvm/BindDirection.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.mvvm;
+package de.neitzel.core.fx.mvvm;
 
 /**
  * Enum representing the direction of data binding between a JavaFX control and a ViewModel property.

fx/src/main/java/de/neitzel/core/fx/mvvm/BindingAwareFXMLLoader.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.mvvm;
+package de.neitzel.core.fx.mvvm;
 
 import javafx.beans.property.Property;
 import javafx.beans.property.StringProperty;

fx/src/main/java/de/neitzel/core/fx/mvvm/GenericViewController.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.mvvm;
+package de.neitzel.core.fx.mvvm;
 
 import javafx.fxml.Initializable;
 import java.net.URL;

fx/src/main/java/de/neitzel/core/fx/mvvm/GenericViewModel.java

@@ -1,4 +1,4 @@
-package de.neitzel.fx.mvvm;
+package de.neitzel.core.fx.mvvm;
 
 import javafx.beans.property.*;
 

fx/src/test/java/de/neitzel/fx/injectfx/testcomponents/test1ok/SuperClass.java

@@ -1,4 +0,0 @@
-package de.neitzel.fx.injectfx.testcomponents.test1ok;
-
-public class SuperClass {
-}

fx/src/test/java/de/neitzel/fx/injectfx/testcomponents/test1ok/TestInterface1_1.java

@@ -1,4 +0,0 @@
-package de.neitzel.fx.injectfx.testcomponents.test1ok;
-
-public interface TestInterface1_1 {
-}

fx/src/test/java/de/neitzel/fx/injectfx/testcomponents/test1ok/TestInterface1_2.java

@@ -1,4 +0,0 @@
-package de.neitzel.fx.injectfx.testcomponents.test1ok;
-
-public interface TestInterface1_2 {
-}

fx/src/test/java/de/neitzel/fx/injectfx/testcomponents/test1ok/sub/TestComponent1_2.java

@@ -1,12 +0,0 @@
-package de.neitzel.fx.injectfx.testcomponents.test1ok.sub;
-
-import de.neitzel.fx.injectfx.testcomponents.test1ok.SuperClass;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.TestInterface1_1;
-import de.neitzel.fx.injectfx.testcomponents.test1ok.TestInterface1_2;
-import de.neitzel.inject.annotation.Component;
-
-@Component
-public class TestComponent1_2 extends SuperClass implements TestInterface1_1, TestInterface1_2 {
-    public TestComponent1_2() {
-    }
-}

pom.xml

@@ -11,7 +11,7 @@
     <packaging>pom</packaging>
 
     <modules>
-        <module>inject</module>
+        <module>core</module>
         <module>fx</module>
         <module>fx-example</module>
     </modules>