Package org.apache.calcite.adapter.mongodb

Class MongoFilter.Translator

  • Enclosing class:
    MongoFilter
    static class MongoFilter.Translator
extends java.lang.Object
    Translates RexNode expressions into MongoDB expression strings.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      (package private) JsonBuilder builder  
      (package private) java.util.Map<java.lang.String,​RexLiteral> eqMap  
      private java.util.List<java.lang.String> fieldNames  
      (package private) com.google.common.collect.Multimap<java.lang.String,​Pair<java.lang.String,​RexLiteral>> multimap  

    • Constructor Summary

      Constructors 
      Constructor Description
      Translator​(java.util.List<java.lang.String> fieldNames)  

    • Method Summary

      All Methods Static Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      private void addPredicate​(java.util.Map<java.lang.String,​java.lang.Object> map, java.lang.String op, java.lang.Object v)  
      private static java.lang.Object literalValue​(RexLiteral literal)  
      private boolean stronger​(java.lang.String key, java.lang.Object v0, java.lang.Object v1)
      Returns whether v0 is a stronger value for operator key than v1.
      private java.util.Map<java.lang.String,​java.lang.Object> translateAnd​(RexNode node0)
      Translates a condition that may be an AND of other conditions.
      private java.lang.Void translateBinary​(java.lang.String op, java.lang.String rop, RexCall call)
      Translates a call to a binary operator, reversing arguments if necessary.
      private boolean translateBinary2​(java.lang.String op, RexNode left, RexNode right)
      Translates a call to a binary operator.
      private java.lang.String translateMatch​(RexNode condition)  
      private java.lang.Void translateMatch2​(RexNode node)  
      private void translateOp2​(java.lang.String op, java.lang.String name, RexLiteral right)  
      private java.lang.Object translateOr​(RexNode condition)  

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • multimap

        final com.google.common.collect.Multimap<java.lang.String,​Pair<java.lang.String,​RexLiteral>> multimap

      • eqMap

        final java.util.Map<java.lang.String,​RexLiteral> eqMap

      • fieldNames

        private final java.util.List<java.lang.String> fieldNames

    • Constructor Detail

      • Translator

        Translator​(java.util.List<java.lang.String> fieldNames)

    • Method Detail

      • translateMatch

        private java.lang.String translateMatch​(RexNode condition)

      • translateOr

        private java.lang.Object translateOr​(RexNode condition)

      • translateAnd

        private java.util.Map<java.lang.String,​java.lang.Object> translateAnd​(RexNode node0)
        Translates a condition that may be an AND of other conditions. Gathers together conditions that apply to the same field.

      • addPredicate

        private void addPredicate​(java.util.Map<java.lang.String,​java.lang.Object> map,
                          java.lang.String op,
                          java.lang.Object v)

      • stronger

        private boolean stronger​(java.lang.String key,
                         java.lang.Object v0,
                         java.lang.Object v1)
        Returns whether v0 is a stronger value for operator key than v1.

        For example, stronger("$lt", 100, 200) returns true, because "< 100" is a more powerful condition than "< 200".

      • literalValue

        private static java.lang.Object literalValue​(RexLiteral literal)

      • translateMatch2

        private java.lang.Void translateMatch2​(RexNode node)

      • translateBinary

        private java.lang.Void translateBinary​(java.lang.String op,
                                       java.lang.String rop,
                                       RexCall call)
        Translates a call to a binary operator, reversing arguments if necessary.

      • translateBinary2

        private boolean translateBinary2​(java.lang.String op,
                                 RexNode left,
                                 RexNode right)
        Translates a call to a binary operator. Returns whether successful.

      • translateOp2

        private void translateOp2​(java.lang.String op,
                          java.lang.String name,
                          RexLiteral right)