#1331 - ENH: Support Aggregation formula with findSingleAttribute() ... max, min, avg, count and count(distinct ..)

src/main/java/io/ebeaninternal/server/deploy/DynamicPropertyBase.java

@@ -0,0 +1,70 @@
+package io.ebeaninternal.server.deploy;
+
+import io.ebeaninternal.server.query.SqlJoinType;
+import io.ebeaninternal.server.query.SqlTreeProperty;
+import io.ebeaninternal.server.type.ScalarType;
+
+import java.util.List;
+
+/**
+ * Abstract base for dynamic properties.
+ */
+abstract class DynamicPropertyBase implements SqlTreeProperty {
+
+  final String name;
+  final String fullName;
+  final String elPrefix;
+  final ScalarType<?> scalarType;
+
+  public DynamicPropertyBase(String name, String fullName, String elPrefix, ScalarType<?> scalarType) {
+    this.name = name;
+    this.fullName = fullName;
+    this.elPrefix = elPrefix;
+    this.scalarType = scalarType;
+  }
+
+  @Override
+  public String getName() {
+    return name;
+  }
+
+  @Override
+  public String getFullBeanName() {
+    return fullName;
+  }
+
+  @Override
+  public boolean isId() {
+    return false;
+  }
+
+  @Override
+  public boolean isEmbedded() {
+    return false;
+  }
+
+  @Override
+  public String getElPrefix() {
+    return elPrefix;
+  }
+
+  @Override
+  public ScalarType<?> getScalarType() {
+    return scalarType;
+  }
+
+  @Override
+  public void buildRawSqlSelectChain(String prefix, List<String> selectChain) {
+    // do nothing, only for RawSql
+  }
+
+  @Override
+  public void loadIgnore(DbReadContext ctx) {
+    scalarType.loadIgnore(ctx.getDataReader());
+  }
+
+  @Override
+  public void appendFrom(DbSqlContext ctx, SqlJoinType joinType) {
+    // do not add to from usually
+  }
+}