[jOOQ/jOOQ#15209] Support ad-hoc compilation of programmatic objects in the code generator

- Add support for GeneratorStrategy

jOOQ-codegen/src/main/java/org/jooq/codegen/GenerationTool.java

@@ -96,6 +96,7 @@ import org.jooq.meta.jaxb.Target;
 import org.jooq.tools.JooqLogger;
 import org.jooq.tools.StringUtils;
 import org.jooq.tools.jdbc.JDBCUtils;
+import org.jooq.tools.reflect.Reflect;
 import org.jooq.util.jaxb.tools.MiniJAXB;
 
 
@@ -412,6 +413,14 @@ public class GenerationTool {
                     g.getStrategy().setName(null);
                 }
             }
+            else if (!isBlank(g.getStrategy().getJava())) {
+                Object o = Reflect.compile(g.getStrategy().getName(), g.getStrategy().getJava()).create().get();
+
+                if (o instanceof GeneratorStrategy s)
+                    strategy = s;
+                else
+                    throw new GeneratorException("GeneratorStrategy must implement org.jooq.codegen.GeneratorStrategy");
+            }
             else {
                 Class<GeneratorStrategy> strategyClass = (Class<GeneratorStrategy>) (!isBlank(g.getStrategy().getName())
                     ? loadClass(trim(g.getStrategy().getName()))

jOOQ-meta/src/main/java/org/jooq/meta/jaxb/Strategy.java

@@ -21,6 +21,7 @@ import org.jooq.util.jaxb.tools.XMLBuilder;
 @XmlAccessorType(XmlAccessType.FIELD)
 @XmlType(name = "Strategy", propOrder = {
     "name",
+    "java",
     "matchers"
 })
 @SuppressWarnings({
@@ -33,6 +34,8 @@ public class Strategy implements Serializable, XMLAppendable
     @XmlElement(defaultValue = "org.jooq.codegen.DefaultGeneratorStrategy")
     @XmlJavaTypeAdapter(StringAdapter.class)
     protected String name = "org.jooq.codegen.DefaultGeneratorStrategy";
+    @XmlJavaTypeAdapter(StringAdapter.class)
+    protected String java;
     protected Matchers matchers;
 
     /**
@@ -51,6 +54,22 @@ public class Strategy implements Serializable, XMLAppendable
         this.name = value;
     }
 
+    /**
+     * A self-contained, inline implementation of {@link org.jooq.codegen.GeneratorStrategy} that will be compiled and class-loaded on the fly by the code generator.
+     * 
+     */
+    public String getJava() {
+        return java;
+    }
+
+    /**
+     * A self-contained, inline implementation of {@link org.jooq.codegen.GeneratorStrategy} that will be compiled and class-loaded on the fly by the code generator.
+     * 
+     */
+    public void setJava(String value) {
+        this.java = value;
+    }
+
     /**
      * The matcher strategy configuration used when applying an XML-based strategy. This cannot be combined with a named strategy configuration.
      * 
@@ -76,6 +95,15 @@ public class Strategy implements Serializable, XMLAppendable
         return this;
     }
 
+    /**
+     * A self-contained, inline implementation of {@link org.jooq.codegen.GeneratorStrategy} that will be compiled and class-loaded on the fly by the code generator.
+     * 
+     */
+    public Strategy withJava(String value) {
+        setJava(value);
+        return this;
+    }
+
     /**
      * The matcher strategy configuration used when applying an XML-based strategy. This cannot be combined with a named strategy configuration.
      * 
@@ -88,6 +116,7 @@ public class Strategy implements Serializable, XMLAppendable
     @Override
     public final void appendTo(XMLBuilder builder) {
         builder.append("name", name);
+        builder.append("java", java);
         builder.append("matchers", matchers);
     }
 
@@ -119,6 +148,15 @@ public class Strategy implements Serializable, XMLAppendable
                 return false;
             }
         }
+        if (java == null) {
+            if (other.java!= null) {
+                return false;
+            }
+        } else {
+            if (!java.equals(other.java)) {
+                return false;
+            }
+        }
         if (matchers == null) {
             if (other.matchers!= null) {
                 return false;
@@ -136,6 +174,7 @@ public class Strategy implements Serializable, XMLAppendable
         final int prime = 31;
         int result = 1;
         result = ((prime*result)+((name == null)? 0 :name.hashCode()));
+        result = ((prime*result)+((java == null)? 0 :java.hashCode()));
         result = ((prime*result)+((matchers == null)? 0 :matchers.hashCode()));
         return result;
     }

jOOQ-meta/src/main/resources/org/jooq/meta/xsd/jooq-codegen-3.19.0.xsd

@@ -157,6 +157,10 @@
       <element name="name" type="string" minOccurs="0" maxOccurs="1" default="org.jooq.codegen.DefaultGeneratorStrategy">
         <annotation><appinfo><jxb:property><jxb:javadoc><![CDATA[The class used to provide a naming strategy for generated source code. You may override this with your custom naming strategy. This cannot be combined with a matcher configuration.]]></jxb:javadoc></jxb:property></appinfo></annotation>
       </element>
+      
+      <element name="java" type="string" minOccurs="0" maxOccurs="1">
+        <annotation><appinfo><jxb:property><jxb:javadoc><![CDATA[A self-contained, inline implementation of {@link org.jooq.codegen.GeneratorStrategy} that will be compiled and class-loaded on the fly by the code generator.]]></jxb:javadoc></jxb:property></appinfo></annotation>
+      </element>
 
       <element name="matchers" type="tns:Matchers" minOccurs="0" maxOccurs="1">
         <annotation><appinfo><jxb:property><jxb:javadoc><![CDATA[The matcher strategy configuration used when applying an XML-based strategy. This cannot be combined with a named strategy configuration.]]></jxb:javadoc></jxb:property></appinfo></annotation>