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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.cassandra.cql.jdbc;

import java.nio.ByteBuffer;
import java.sql.Types;

import org.apache.cassandra.utils.ByteBufferUtil;

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

    JdbcDouble() {}

    public boolean isCaseSensitive()
    {
        return false;
    }

    public int getScale(Double obj)
    {
        return 300;
    }

    public int getPrecision(Double obj)
    {
        return 15;
    }

    public boolean isCurrency()
    {
        return false;
    }

    public boolean isSigned()
    {
        return true;
    }

    public String toString(Double obj)
    {
        return obj.toString();
    }

    public boolean needsQuotes()
    {
        return false;
    }

    public String getString(ByteBuffer bytes)
    {
        if (bytes.remaining() == 0)
        {
            return "";
        }
        if (bytes.remaining() != 8)
        {
            throw new MarshalException("A double is exactly 8 bytes : "+bytes.remaining());
        }

        return ((Double)ByteBufferUtil.toDouble(bytes)).toString();
    }

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

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

    public Double compose(ByteBuffer bytes)
    {
        return ByteBufferUtil.toDouble(bytes);
    }

    public ByteBuffer decompose(Double value)
    {
        return (value==null) ? ByteBufferUtil.EMPTY_BYTE_BUFFER : ByteBufferUtil.bytes(value);
    }
}