Sets a char parameter in a PreparedStatement to either a value or null. - Java java.sql

Java examples for java.sql:PreparedStatement

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Description

Sets a char parameter in a PreparedStatement to either a value or null.

Demo Code

/*// w w  w .  j  ava2 s  .c om
 * $Id: DbUtil.java 1566 2009-11-01 16:11:16Z amandel $
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//package com.java2s;

import java.io.StringReader;

import java.sql.PreparedStatement;

import java.sql.SQLException;

import java.sql.Timestamp;
import java.sql.Types;

public class Main {
    /**
     * Sets a parameter in a PreparedStatement to either a value or null.
     *
     * @param pstmt the prepared statement
     * @param paramIndex the parameter index of the parameter to be set
     * @param value the value to which the parameter must be set
     * @throws SQLException if a database access error occurs.
     */
    public static void setCharOrNull(PreparedStatement pstmt,
            int paramIndex, String value) throws SQLException {
        setParameterOrNull(pstmt, paramIndex, value, Types.CHAR);
    }

    private static void setParameterOrNull(PreparedStatement pstmt,
            int paramIndex, Object value, int type) throws SQLException {
        if (value != null) {
            switch (type) {
            case Types.VARCHAR:
            case Types.CHAR:
                pstmt.setString(paramIndex, (String) value);
                break;
            case Types.CLOB:
                final String strVal = (String) value;
                pstmt.setCharacterStream(paramIndex, new StringReader(
                        strVal), strVal.length());
                break;
            case Types.TIMESTAMP:
                final Timestamp tstampVal = (Timestamp) value;
                pstmt.setTimestamp(paramIndex, tstampVal);
                break;
            case Types.INTEGER:
                final Integer intVal = (Integer) value;
                pstmt.setInt(paramIndex, intVal.intValue());
                break;
            default:
                throw new RuntimeException("Unexpected SQL type " + type
                        + " encountered");
            }
        } else {
            pstmt.setNull(paramIndex, type);
        }
    }
}

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