Java RexToLixTranslator.translateProjects方法代码示例

import org.apache.calcite.adapter.enumerable.RexToLixTranslator; //导入方法依赖的package包/类
/**
 * Create quasi-Java expression from given {@link RexNode}
 *
 * @param node Expression in the form of {@link RexNode}
 * @param inputRowType Input Data type to expression in the form of {@link RelDataType}
 * @param outputRowType Output data type of expression in the form of {@link RelDataType}
 *
 * @return Returns quasi-Java expression
 */
public String getExpression(RexNode node, RelDataType inputRowType, RelDataType outputRowType)
{
  final RexProgramBuilder programBuilder = new RexProgramBuilder(inputRowType, rexBuilder);
  programBuilder.addProject(node, null);
  final RexProgram program = programBuilder.getProgram();

  final BlockBuilder builder = new BlockBuilder();
  final JavaTypeFactory javaTypeFactory = (JavaTypeFactory)rexBuilder.getTypeFactory();

  final RexToLixTranslator.InputGetter inputGetter = new RexToLixTranslator.InputGetterImpl(ImmutableList
      .of(Pair.<Expression, PhysType>of(Expressions.variable(Object[].class, "inputValues"),
      PhysTypeImpl.of(javaTypeFactory, inputRowType, JavaRowFormat.ARRAY, false))));
  final Function1<String, RexToLixTranslator.InputGetter> correlates =
      new Function1<String, RexToLixTranslator.InputGetter>()
    {
      public RexToLixTranslator.InputGetter apply(String a0)
      {
        throw new UnsupportedOperationException();
      }
    };

  final List<Expression> list = RexToLixTranslator.translateProjects(program, javaTypeFactory, builder,
      PhysTypeImpl.of(javaTypeFactory, outputRowType, JavaRowFormat.ARRAY, false), null, inputGetter, correlates);

  for (int i = 0; i < list.size(); i++) {
    Statement statement = Expressions.statement(list.get(i));
    builder.add(statement);
  }

  return finalizeExpression(builder.toBlock(), inputRowType);
}
 

import org.apache.calcite.adapter.enumerable.RexToLixTranslator; //导入方法依赖的package包/类
private BlockBuilder compileToBlock(final RexProgram program, ParameterExpression context_,
                                      ParameterExpression outputValues_) {
  RelDataType inputRowType = program.getInputRowType();
  final BlockBuilder builder = new BlockBuilder();
  final JavaTypeFactoryImpl javaTypeFactory =
          new JavaTypeFactoryImpl(rexBuilder.getTypeFactory().getTypeSystem());

  final RexToLixTranslator.InputGetter inputGetter =
          new RexToLixTranslator.InputGetterImpl(
                  ImmutableList.of(
                          Pair.<Expression, PhysType>of(
                                  Expressions.field(context_,
                                          BuiltInMethod.CONTEXT_VALUES.field),
                                  PhysTypeImpl.of(javaTypeFactory, inputRowType,
                                          JavaRowFormat.ARRAY, false))));
  final Function1<String, RexToLixTranslator.InputGetter> correlates =
          new Function1<String, RexToLixTranslator.InputGetter>() {
            public RexToLixTranslator.InputGetter apply(String a0) {
              throw new UnsupportedOperationException();
            }
          };
  final Expression root =
          Expressions.field(context_, BuiltInMethod.CONTEXT_ROOT.field);
  final List<Expression> list =
          RexToLixTranslator.translateProjects(program, javaTypeFactory, builder,
                  null, root, inputGetter, correlates);
  for (int i = 0; i < list.size(); i++) {
    builder.add(
            Expressions.statement(
                    Expressions.assign(
                            Expressions.arrayIndex(outputValues_,
                                    Expressions.constant(i)),
                            list.get(i))));
  }

  return builder;
}
 

import org.apache.calcite.adapter.enumerable.RexToLixTranslator; //导入方法依赖的package包/类
private String compile(RexBuilder rexBuilder, List<RexNode> constExps,
    RexToLixTranslator.InputGetter getter, RelDataType rowType) {
  final RexProgramBuilder programBuilder =
      new RexProgramBuilder(rowType, rexBuilder);
  for (RexNode node : constExps) {
    programBuilder.addProject(
        node, "c" + programBuilder.getProjectList().size());
  }
  final JavaTypeFactoryImpl javaTypeFactory =
      new JavaTypeFactoryImpl(rexBuilder.getTypeFactory().getTypeSystem());
  final BlockBuilder blockBuilder = new BlockBuilder();
  final ParameterExpression root0_ =
      Expressions.parameter(Object.class, "root0");
  final ParameterExpression root_ = DataContext.ROOT;
  blockBuilder.add(
      Expressions.declare(
          Modifier.FINAL, root_,
          Expressions.convert_(root0_, DataContext.class)));
  final List<Expression> expressions =
      RexToLixTranslator.translateProjects(programBuilder.getProgram(),
      javaTypeFactory, blockBuilder, null, root_, getter, null);
  blockBuilder.add(
      Expressions.return_(null,
          Expressions.newArrayInit(Object[].class, expressions)));
  final MethodDeclaration methodDecl =
      Expressions.methodDecl(Modifier.PUBLIC, Object[].class,
          BuiltInMethod.FUNCTION1_APPLY.method.getName(),
          ImmutableList.of(root0_), blockBuilder.toBlock());
  String code = Expressions.toString(methodDecl);
  if (CalcitePrepareImpl.DEBUG) {
    Util.debugCode(System.out, code);
  }
  return code;
}
 

import org.apache.calcite.adapter.enumerable.RexToLixTranslator; //导入方法依赖的package包/类
public Scalar compile(List<RexNode> nodes, RelDataType inputRowType) {
  final RexProgramBuilder programBuilder =
      new RexProgramBuilder(inputRowType, rexBuilder);
  for (RexNode node : nodes) {
    programBuilder.addProject(node, null);
  }
  final RexProgram program = programBuilder.getProgram();

  final BlockBuilder builder = new BlockBuilder();
  final ParameterExpression context_ =
      Expressions.parameter(Context.class, "context");
  final ParameterExpression outputValues_ =
      Expressions.parameter(Object[].class, "outputValues");
  final JavaTypeFactoryImpl javaTypeFactory =
      new JavaTypeFactoryImpl(rexBuilder.getTypeFactory().getTypeSystem());

  // public void execute(Context, Object[] outputValues)
  final RexToLixTranslator.InputGetter inputGetter =
      new RexToLixTranslator.InputGetterImpl(
          ImmutableList.of(
              Pair.<Expression, PhysType>of(
                  Expressions.field(context_,
                      BuiltInMethod.CONTEXT_VALUES.field),
                  PhysTypeImpl.of(javaTypeFactory, inputRowType,
                      JavaRowFormat.ARRAY, false))));
  final Function1<String, RexToLixTranslator.InputGetter> correlates =
      new Function1<String, RexToLixTranslator.InputGetter>() {
        public RexToLixTranslator.InputGetter apply(String a0) {
          throw new UnsupportedOperationException();
        }
      };
  final Expression root =
      Expressions.field(context_, BuiltInMethod.CONTEXT_ROOT.field);
  final List<Expression> list =
      RexToLixTranslator.translateProjects(program, javaTypeFactory, builder,
          null, root, inputGetter, correlates);
  for (int i = 0; i < list.size(); i++) {
    builder.add(
        Expressions.statement(
            Expressions.assign(
                Expressions.arrayIndex(outputValues_,
                    Expressions.constant(i)),
                list.get(i))));
  }
  return baz(context_, outputValues_, builder.toBlock());
}