Package org.eclipse.edc.sql.translation

Class JsonArrayTranslator

java.lang.Object

org.eclipse.edc.sql.translation.JsonArrayTranslator

All Implemented Interfaces:

FieldTranslator

public class JsonArrayTranslator
extends Object
implements FieldTranslator

This is a specialized translator, that targets object properties that are JSON array, for example someObject.jsonArray, and a criterion of "jsonArray contains foobar".

This is necessary, because with a conventional JsonFieldTranslator we would get (jsonArray -> 'jsonArray')::jsonb ?? ?, because it always assumes one indirection from columnName to object name.

The JsonArrayTranslator explicitly ignores this indirection.

Field Summary

Fields

Modifier and Type	Field	Description
protected final String	columnName

Fields inherited from interface org.eclipse.edc.sql.translation.FieldTranslator

PREPARED_STATEMENT_PLACEHOLDER

Constructor Summary

Constructors

Constructor	Description
JsonArrayTranslator(String columnName)

Method Summary

Modifier and Type	Method	Description
String	getLeftOperand(List<org.eclipse.edc.util.reflection.PathItem> path, Class<?> rightOperandType)	Get left operand for a SQL query given the canonical path name and the type
WhereClause	toWhereClause(List<org.eclipse.edc.util.reflection.PathItem> path, org.eclipse.edc.spi.query.Criterion criterion, SqlOperator operator)	Translate the Criterion into a WhereClause.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.edc.sql.translation.FieldTranslator

toParameters

Field Details

columnName

protected final String columnName

Constructor Details

JsonArrayTranslator

public JsonArrayTranslator(String columnName)

Method Details

getLeftOperand

public String getLeftOperand(List<org.eclipse.edc.util.reflection.PathItem> path,
 Class<?> rightOperandType)

Description copied from interface: FieldTranslator

Get left operand for a SQL query given the canonical path name and the type

Specified by:

getLeftOperand in interface FieldTranslator

Parameters:

path - the path.

Returns:

the left operand.

toWhereClause

public WhereClause toWhereClause(List<org.eclipse.edc.util.reflection.PathItem> path,
 org.eclipse.edc.spi.query.Criterion criterion,
 SqlOperator operator)

Description copied from interface: FieldTranslator

Translate the Criterion into a WhereClause.

Specified by:

toWhereClause in interface FieldTranslator

Parameters:

path - the path.

criterion - the criterion.

operator - the sql operator.

Returns:

the WhereClause.