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package com.salesforce.phoenix.expression;

import java.math.BigDecimal;
import java.math.MathContext;
import java.math.RoundingMode;

import org.apache.hadoop.hbase.io.ImmutableBytesWritable;

import com.salesforce.phoenix.expression.visitor.ExpressionVisitor;
import com.salesforce.phoenix.schema.ColumnModifier;
import com.salesforce.phoenix.schema.PDataType;
import com.salesforce.phoenix.schema.tuple.Tuple;


public class CeilingDecimalExpression extends BaseSingleExpression {
    private static final MathContext CEILING_CONTEXT = new MathContext(0, RoundingMode.CEILING);
    
    public CeilingDecimalExpression() {
    }
    
    public CeilingDecimalExpression(Expression child)  {
        super(child);
    }
    
    protected MathContext getMathContext() {
        return CEILING_CONTEXT;
    }
    
    @Override
    public boolean evaluate(Tuple tuple, ImmutableBytesWritable ptr) {
        Expression child =  getChild();
        if (child.evaluate(tuple, ptr)) {
            PDataType childType = child.getDataType();
            childType.coerceBytes(ptr, childType, child.getColumnModifier(), null);
            BigDecimal value = (BigDecimal) childType.toObject(ptr);
            value = value.round(getMathContext());
            byte[] b = childType.toBytes(value, child.getColumnModifier());
            ptr.set(b);
            return true;
        }
        return false;
    }

    @Override
    public ColumnModifier getColumnModifier() {
            return getChild().getColumnModifier();
    }    

    @Override
    public final PDataType getDataType() {
        return  getChild().getDataType();
    }
    
    @Override
    public final <T> T accept(ExpressionVisitor<T> visitor) {
        return getChild().accept(visitor);
    }
    
    @Override
    public String toString() {
        StringBuilder buf = new StringBuilder("CEIL(");
        for (int i = 0; i < children.size() - 1; i++) {
            buf.append(getChild().toString());
        }
        buf.append(")");
        return buf.toString();
    }
}

@@ -2299,17 +2299,17 @@
 Context(
-0
+1
 , Roundi

Use scale of 1 for CEIL math context