com.github.adejanovski.cassandra.jdbc.JdbcDecimal Maven / Gradle / Ivy

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JDBC wrapper for the DataStax CQL Java Driver.

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/*
 *
 *   Licensed under the Apache License, Version 2.0 (the "License");
 *   you may not use this file except in compliance with the License.
 *   You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *   Unless required by applicable law or agreed to in writing, software
 *   distributed under the License is distributed on an "AS IS" BASIS,
 *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *   See the License for the specific language governing permissions and
 *   limitations under the License.
 */
package com.github.adejanovski.cassandra.jdbc;

import java.math.BigDecimal;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.sql.Types;


public class JdbcDecimal extends AbstractJdbcType
{
    public static final JdbcDecimal instance = new JdbcDecimal();

    JdbcDecimal() {}

    public boolean isCaseSensitive()
    {
        return false;
    }

    public int getScale(BigDecimal obj)
    {
        return obj.scale();
    }

    public int getPrecision(BigDecimal obj)
    {
        return obj.precision();
    }

    public boolean isCurrency()
    {
        return false;
    }

    public boolean isSigned()
    {
        return true;
    }

    public String toString(BigDecimal obj)
    {
        return obj.toPlainString();
    }

    public boolean needsQuotes()
    {
        return false;
    }

    public String getString(ByteBuffer bytes)
    {
        if (bytes == null) return "null";
        if (bytes.remaining() == 0) return "empty";
        return compose(bytes).toPlainString();
    }

    public Class getType()
    {
        return BigDecimal.class;
    }

    public int getJdbcType()
    {
        return Types.DECIMAL;
    }

    public BigDecimal compose(Object value)
    {        
        return (BigDecimal)value;
    }

    /**
     * The bytes of the ByteBuffer are made up of 4 bytes of int containing the scale
     * followed by the n bytes it takes to store a BigInteger.
     */
    public Object decompose(BigDecimal value)
    {        
        return (Object)value;
    }

}