public static class StringOperators.Concat extends Object
AggregationExpression
for $concat
.protected String getMongoMethod()
public static StringOperators.Concat valueOf(String fieldReference)
StringOperators.Concat
.fieldReference
- must not be null.public static StringOperators.Concat valueOf(AggregationExpression expression)
StringOperators.Concat
.expression
- must not be null.public static StringOperators.Concat stringValue(String value)
StringOperators.Concat
.value
- must not be null.public StringOperators.Concat concatValueOf(String fieldReference)
public StringOperators.Concat concatValueOf(AggregationExpression expression)
public StringOperators.Concat concat(String value)
public com.mongodb.DBObject toDbObject(AggregationOperationContext context)
AggregationExpression
toDbObject
in interface AggregationExpression
public com.mongodb.DBObject toDbObject(Object value, AggregationOperationContext context)
protected <T> T get(int index)
T
- index
- protected <T> T get(Object key)
T
- key
- protected boolean contains(Object key)
key
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