org.apache.calcite.rel.externalize

Class RelJsonReader

java.lang.Object

org.apache.calcite.rel.externalize.RelJsonReader

public class RelJsonReader
extends Object

Reads a JSON plan and converts it back to a tree of relational expressions.

See Also:

RelInput

Field Summary

Fields

Modifier and Type	Field and Description
private RelOptCluster	cluster
private RelNode	lastRel
private RelJson	relJson
private Map<String,RelNode>	relMap
private RelOptSchema	relOptSchema
private static com.fasterxml.jackson.core.type.TypeReference<LinkedHashMap<String,Object>>	TYPE_REF

Constructor Summary

Constructors

Constructor and Description
RelJsonReader(RelOptCluster cluster, RelOptSchema relOptSchema, Schema schema)

Method Summary

Modifier and Type	Method and Description
private RelNode	lookupInput(String jsonInput)
RelNode	read(String s)
private void	readRel(Map<String,Object> jsonRel)
private void	readRels(List<Map<String,Object>> jsonRels)
private AggregateCall	toAggCall(Map<String,Object> jsonAggCall)

Methods inherited from class java.lang.Object

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

Field Detail

TYPE_REF

private static final com.fasterxml.jackson.core.type.TypeReference<LinkedHashMap<String,Object>> TYPE_REF

cluster

private final RelOptCluster cluster

relOptSchema

private final RelOptSchema relOptSchema

relJson

private final RelJson relJson

relMap

private final Map<String,RelNode> relMap

lastRel

private RelNode lastRel

Constructor Detail

RelJsonReader

public RelJsonReader(RelOptCluster cluster,
                     RelOptSchema relOptSchema,
                     Schema schema)

Method Detail

read

public RelNode read(String s)
             throws IOException

Throws:

IOException

readRels

private void readRels(List<Map<String,Object>> jsonRels)

readRel

private void readRel(Map<String,Object> jsonRel)

toAggCall

private AggregateCall toAggCall(Map<String,Object> jsonAggCall)

lookupInput

private RelNode lookupInput(String jsonInput)