Package org.apache.calcite.adapter.java

Class ReflectiveSchema.Factory

  • All Implemented Interfaces:
    SchemaFactory
    Enclosing class:
    ReflectiveSchema
    public static class ReflectiveSchema.Factory
extends java.lang.Object
implements SchemaFactory
    Factory that creates a schema by instantiating an object and looking at its public fields.

    The following example instantiates a FoodMart object as a schema that contains tables called EMPS and DEPTS based on the object's fields. 

     schemas: [
     {
       name: "foodmart",
       type: "custom",
       factory: "org.apache.calcite.adapter.java.ReflectiveSchema$Factory",
       operand: {
         class: "com.acme.FoodMart",
         staticMethod: "instance"
       }
     }
   ]
  
 class FoodMart {
   public static final FoodMart instance() {
     return new FoodMart();
   }
  
   Employee[] EMPS;
   Department[] DEPTS;
 }

    • Constructor Summary

      Constructors 
      Constructor Description
      Factory()  

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      Schema create​(SchemaPlus parentSchema, java.lang.String name, java.util.Map<java.lang.String,​java.lang.Object> operand)
      Creates a Schema.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

    • Constructor Detail

      • Factory

        public Factory()

    • Method Detail

      • create

        public Schema create​(SchemaPlus parentSchema,
                     java.lang.String name,
                     java.util.Map<java.lang.String,​java.lang.Object> operand)
        Description copied from interface: SchemaFactory
        Creates a Schema.
        Specified by:
        create in interface SchemaFactory
        Parameters:
        parentSchema - Parent schema
        name - Name of this schema
        operand - The "operand" JSON property
        Returns:
        Created schema