Examples with Expression com.hortonworks.streamline.streams.layout.component.rule.expression.Expression used on opensource projects

Example 6 with Expression

use of com.hortonworks.streamline.streams.layout.component.rule.expression.Expression in project streamline by hortonworks.

the class RuleProcessorRuntime method createSqlExpression.

private StormSqlExpression createSqlExpression(Rule rule) {
    List<Expression> groupByExpressions = new ArrayList<>();
    if (rule.getWindow() != null) {
        groupByExpressions.addAll(GROUP_BY_WINDOWID.getExpressions());
    }
    if (rule.getGroupBy() != null) {
        groupByExpressions.addAll(rule.getGroupBy().getExpressions());
    }
    StormSqlExpression stormSqlExpression = new StormSqlExpression(rule.getCondition(), rule.getProjection(), groupByExpressions.isEmpty() ? null : new GroupBy(groupByExpressions), groupByExpressions.isEmpty() ? null : rule.getHaving());
    LOG.info("Built stormSqlExpression {}", stormSqlExpression);
    return stormSqlExpression;
}

Example 7 with Expression

use of com.hortonworks.streamline.streams.layout.component.rule.expression.Expression in project streamline by hortonworks.

the class StormSqlExpression method handleProjection.

private void handleProjection() {
    if (projection != null) {
        for (Expression expr : projection.getExpressions()) {
            ExpressionTranslator translator = new StormSqlExpressionTranslator();
            expr.accept(translator);
            stormSqlFields.addAll(translator.getFields());
            functions.addAll(translator.getFunctions());
            aggregateFunctions.addAll(translator.getAggregateFunctions());
            projectedFields.add(translator.getTranslatedExpression());
            if (!translator.getAliases().isEmpty()) {
                outputFields.add(translator.getAliases().get(0));
            } else {
                outputFields.add(translator.getUnquotedTranslatedExpression());
            }
        }
    }
}

Example 8 with Expression

use of com.hortonworks.streamline.streams.layout.component.rule.expression.Expression in project streamline by hortonworks.

the class GroovyExpressionTest method testOrString.

@Test
public void testOrString() throws Exception {
    Condition condition = new Condition();
    Expression left = new BinaryExpression(Operator.LESS_THAN, getVariable("a"), getVariable("b"));
    Expression right = new BinaryExpression(Operator.GREATER_THAN, getVariable("c"), getVariable("d"));
    condition.setExpression(new BinaryExpression(Operator.OR, left, right));
    GroovyExpression expr = new GroovyExpression(condition);
    Assert.assertEquals("a < b || c > d", expr.asString());
}

Example 9 with Expression

use of com.hortonworks.streamline.streams.layout.component.rule.expression.Expression in project streamline by hortonworks.

the class GroovyExpressionTest method testAndAsString.

@Test
public void testAndAsString() throws Exception {
    Condition condition = new Condition();
    Expression left = new BinaryExpression(Operator.OR, getVariable("a"), getVariable("b"));
    Expression right = new BinaryExpression(Operator.OR, getVariable("c"), getVariable("d"));
    condition.setExpression(new BinaryExpression(Operator.AND, left, right));
    GroovyExpression expr = new GroovyExpression(condition);
    Assert.assertEquals("(a || b) && (c || d)", expr.asString());
}

Example 10 with Expression

use of com.hortonworks.streamline.streams.layout.component.rule.expression.Expression in project streamline by hortonworks.

the class ExpressionGenerator method visitSqlSpecialOperator.

private Expression visitSqlSpecialOperator(SqlSpecialOperator specialOperator, List<SqlNode> operands) {
    if (specialOperator.getName().equalsIgnoreCase("ITEM")) {
        Expression left = operands.get(0).accept(this);
        SqlNode right = operands.get(1);
        if (right instanceof SqlNumericLiteral) {
            SqlNumericLiteral index = (SqlNumericLiteral) right;
            if (!index.isInteger()) {
                throw new IllegalArgumentException("Invalid array index " + index);
            }
            return new ArrayFieldExpression(left, Integer.parseInt(index.toValue()));
        } else if (right instanceof SqlCharStringLiteral) {
            String key = ((SqlCharStringLiteral) right).toValue();
            return new MapFieldExpression(left, key);
        } else {
            throw new IllegalArgumentException("Item right operand '" + right + "' must be numeric or character type");
        }
    } else if (specialOperator.getName().equalsIgnoreCase("AS")) {
        Expression left = operands.get(0).accept(this);
        String alias = operands.get(1).toString();
        return new AsExpression(left, alias);
    } else {
        throw new UnsupportedOperationException("Operator " + specialOperator + " not implemented");
    }
}