Add SAP HANA support (#1511)

src/main/java/io/ebeaninternal/server/expression/platform/DbExpressionHandlerFactory.java

@@ -25,6 +25,8 @@ public class DbExpressionHandlerFactory {
       case SQLSERVER17:
       case SQLSERVER:
         return new SqlServerDbExpression();
+      case HANA:
+        return new HanaDbExpression();
       default:
         return new BasicDbExpression();
     }

src/main/java/io/ebeaninternal/server/expression/platform/HanaDbExpression.java

@@ -0,0 +1,60 @@
+package io.ebeaninternal.server.expression.platform;
+
+import io.ebeaninternal.api.SpiExpressionRequest;
+import io.ebeaninternal.server.expression.BitwiseOp;
+import io.ebeaninternal.server.expression.Op;
+
+/**
+ * HANA handling of platform specific expressions.
+ */
+public class HanaDbExpression extends BaseDbExpression {
+
+  @Override
+  public void bitwise(SpiExpressionRequest request, String propName, BitwiseOp operator, long flags, String compare,
+      long match) {
+    bitwiseFunction(request, propName, operator, compare);
+  }
+
+  @Override
+  public void json(SpiExpressionRequest request, String propName, String path, Op operator, Object value) {
+    request.append("json_value(").append(propName).append(", '$.").append(path).append("')");
+    request.append(operator.bind());
+  }
+
+  @Override
+  public void arrayIsEmpty(SpiExpressionRequest request, String propName, boolean empty) {
+    request.append("cardinality(").append(propName).append(")");
+    if (empty) {
+      request.append(" = 0");
+    } else {
+      request.append(" <> 0");
+    }
+  }
+
+  @Override
+  public String concat(String property0, String separator, String property1, String suffix) {
+    StringBuilder sb = new StringBuilder();
+    sb.append("concat(").append(property0).append(", '").append(separator).append("'||").append(property1);
+    if (suffix != null && !suffix.isEmpty()) {
+      sb.append("||'").append(suffix).append('\'');
+    }
+    sb.append(")");
+    return sb.toString();
+  }
+
+  @Override
+  public void arrayContains(SpiExpressionRequest request, String propName, boolean contains, Object... values) {
+    for (int i = 0; i < values.length; i++) {
+      if (i > 0) {
+        request.append(" and ");
+      }
+      request.append("(?");
+      if (!contains) {
+        request.append(" not ");
+      }
+      request.append(" member of ").append(propName).append(")");
+
+    }
+  }
+
+}