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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.nio.ByteBuffer;
import java.sql.Types;
import java.text.SimpleDateFormat;
import java.util.Date;


public class JdbcDate extends AbstractJdbcType
{
    public static final String[] iso8601Patterns = new String[] {
        "yyyy-MM-dd HH:mm",
        "yyyy-MM-dd HH:mm:ss",
        "yyyy-MM-dd HH:mmZ",
        "yyyy-MM-dd HH:mm:ssZ",
        "yyyy-MM-dd'T'HH:mm",
        "yyyy-MM-dd'T'HH:mmZ",
        "yyyy-MM-dd'T'HH:mm:ss",
        "yyyy-MM-dd'T'HH:mm:ssZ",
        "yyyy-MM-dd",
        "yyyy-MM-ddZ",
        "yyyy-MM-dd'T'HH:mm:ss.SSS",		
		"yyyy-MM-dd'T'HH:mm:ss",
		"yyyy-MM-dd HH:mm:ss.SSS",
		"yyyy-MM-dd HH:mm:ss",		
		"yyyy-MM-dd'T'HH:mm:ss.SSSZ"
    };
    static final String DEFAULT_FORMAT = iso8601Patterns[3];
    static final ThreadLocal FORMATTER = new ThreadLocal()
    {
        protected SimpleDateFormat initialValue()
        {
            return new SimpleDateFormat(DEFAULT_FORMAT);
        }
    };

    public static final JdbcDate instance = new JdbcDate();

    JdbcDate() {}

    public boolean isCaseSensitive()
    {
        return false;
    }

    public int getScale(Date obj)
    {
        return -1;
    }

    public int getPrecision(Date obj)
    {
        return -1;
    }

    public boolean isCurrency()
    {
        return false;
    }

    public boolean isSigned()
    {
        return false;
    }

    public String toString(Date obj)
    {
        return FORMATTER.get().format(obj);
    }

    public boolean needsQuotes()
    {
        return false;
    }

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

        // uses ISO-8601 formatted string
        return FORMATTER.get().format(new Date(bytes.getLong(bytes.position())));
    }

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

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

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

    public Object decompose(Date value)
    {
      return (value==null) ? null
                           : (Object)value;
    }

}