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package sqlancer.postgres.ast;
import sqlancer.Randomly;
import sqlancer.common.ast.BinaryOperatorNode.Operator;
import sqlancer.postgres.PostgresSchema.PostgresDataType;
public class PostgresPostfixOperation implements PostgresExpression {
private final PostgresExpression expr;
private final PostfixOperator op;
private final String operatorTextRepresentation;
public enum PostfixOperator implements Operator {
IS_NULL("IS NULL", "ISNULL") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
return PostgresConstant.createBooleanConstant(expectedValue.isNull());
}
@Override
public PostgresDataType[] getInputDataTypes() {
return PostgresDataType.values();
}
},
IS_UNKNOWN("IS UNKNOWN") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
return PostgresConstant.createBooleanConstant(expectedValue.isNull());
}
@Override
public PostgresDataType[] getInputDataTypes() {
return new PostgresDataType[] { PostgresDataType.BOOLEAN };
}
},
IS_NOT_NULL("IS NOT NULL", "NOTNULL") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
return PostgresConstant.createBooleanConstant(!expectedValue.isNull());
}
@Override
public PostgresDataType[] getInputDataTypes() {
return PostgresDataType.values();
}
},
IS_NOT_UNKNOWN("IS NOT UNKNOWN") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
return PostgresConstant.createBooleanConstant(!expectedValue.isNull());
}
@Override
public PostgresDataType[] getInputDataTypes() {
return new PostgresDataType[] { PostgresDataType.BOOLEAN };
}
},
IS_TRUE("IS TRUE") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
if (expectedValue.isNull()) {
return PostgresConstant.createFalse();
} else {
return PostgresConstant
.createBooleanConstant(expectedValue.cast(PostgresDataType.BOOLEAN).asBoolean());
}
}
@Override
public PostgresDataType[] getInputDataTypes() {
return new PostgresDataType[] { PostgresDataType.BOOLEAN };
}
},
IS_FALSE("IS FALSE") {
@Override
public PostgresConstant apply(PostgresConstant expectedValue) {
if (expectedValue.isNull()) {
return PostgresConstant.createFalse();
} else {
return PostgresConstant
.createBooleanConstant(!expectedValue.cast(PostgresDataType.BOOLEAN).asBoolean());
}
}
@Override
public PostgresDataType[] getInputDataTypes() {
return new PostgresDataType[] { PostgresDataType.BOOLEAN };
}
};
private String[] textRepresentations;
PostfixOperator(String... textRepresentations) {
this.textRepresentations = textRepresentations.clone();
}
public abstract PostgresConstant apply(PostgresConstant expectedValue);
public abstract PostgresDataType[] getInputDataTypes();
public static PostfixOperator getRandom() {
return Randomly.fromOptions(values());
}
@Override
public String getTextRepresentation() {
return toString();
}
}
public PostgresPostfixOperation(PostgresExpression expr, PostfixOperator op) {
this.expr = expr;
this.operatorTextRepresentation = Randomly.fromOptions(op.textRepresentations);
this.op = op;
}
@Override
public PostgresDataType getExpressionType() {
return PostgresDataType.BOOLEAN;
}
@Override
public PostgresConstant getExpectedValue() {
PostgresConstant expectedValue = expr.getExpectedValue();
if (expectedValue == null) {
return null;
}
return op.apply(expectedValue);
}
public String getOperatorTextRepresentation() {
return operatorTextRepresentation;
}
public static PostgresExpression create(PostgresExpression expr, PostfixOperator op) {
return new PostgresPostfixOperation(expr, op);
}
public PostgresExpression getExpression() {
return expr;
}
}