Transform extra-ddl.xml files when running in ddl mode (no migration) (#1531)

src/main/java/io/ebeaninternal/dbmigration/ScriptTransform.java

@@ -0,0 +1,40 @@
+package io.ebeaninternal.dbmigration;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Transforms a SQL script given a map of key/value substitutions.
+ */
+class ScriptTransform {
+
+  /**
+   * Transform just ${table} with the table name.
+   */
+  static String replace(String key, String value, String script) {
+    return script.replace(key, value);
+  }
+
+  private final Map<String,String> placeholders = new HashMap<>();
+
+  ScriptTransform(Map<String,String> map) {
+    for (Map.Entry<String, String> entry : map.entrySet()) {
+      placeholders.put(wrapKey(entry.getKey()), entry.getValue());
+    }
+  }
+
+  private String wrapKey(String key) {
+    return "${"+key+"}";
+  }
+
+  /**
+   * Transform the script replacing placeholders in the form <code>${key}</code> with <code>value</code>.
+   */
+  String transform(String source) {
+
+    for (Map.Entry<String, String> entry : placeholders.entrySet()) {
+      source = source.replace(entry.getKey(), entry.getValue());
+    }
+    return source;
+  }
+}