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<h2 title="Class Support" class="title">Class Support</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li>net.sourceforge.jtds.jdbc.Support</li>
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<pre>public class <span class="strong">Support</span>
extends java.lang.Object</pre>
<div class="block">This class contains static utility methods designed to support the
main driver classes.
<p>
Implementation notes:
<ol>
<li>The methods in this class incorporate some code from previous versions
of jTDS to handle dates, BLobs etc.
<li>This class contains routines to generate runtime messages from the resource file.
<li>The key data conversion logic used in Statements and result sets is implemented here.
<li>There is nothing here which is TDS specific.
</ol></div>
<dl><dt><span class="strong">Version:</span></dt>
<dd>$Id: Support.java,v 1.56.2.6 2010-05-17 09:36:57 ickzon Exp $</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Mike Hutchinson, jTDS project</dd></dl>
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<td class="colFirst"><code>private static java.math.BigDecimal</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#BIG_DECIMAL_ONE">BIG_DECIMAL_ONE</a></strong></code> </td>
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<tr class="rowColor">
<td class="colFirst"><code>private static java.math.BigDecimal</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#BIG_DECIMAL_ZERO">BIG_DECIMAL_ZERO</a></strong></code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private static java.sql.Date</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#DATE_ZERO">DATE_ZERO</a></strong></code> </td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>private static java.lang.Double</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#DOUBLE_ONE">DOUBLE_ONE</a></strong></code> </td>
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<tr class="altColor">
<td class="colFirst"><code>private static java.lang.Double</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#DOUBLE_ZERO">DOUBLE_ZERO</a></strong></code> </td>
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<td class="colFirst"><code>private static java.lang.Float</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#FLOAT_ONE">FLOAT_ONE</a></strong></code> </td>
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<td class="colFirst"><code>private static java.lang.Float</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#FLOAT_ZERO">FLOAT_ZERO</a></strong></code> </td>
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<td class="colFirst"><code>private static char[]</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#hex">hex</a></strong></code>
<div class="block">Hex constants to use in conversion routines.</div>
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<td class="colFirst"><code>private static java.lang.Integer</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#INTEGER_ONE">INTEGER_ONE</a></strong></code> </td>
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<td class="colFirst"><code>private static java.lang.Integer</code></td>
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<td class="colFirst"><code>private static java.lang.Long</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#LONG_ONE">LONG_ONE</a></strong></code> </td>
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<tr class="rowColor">
<td class="colFirst"><code>private static java.lang.Long</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#LONG_ZERO">LONG_ZERO</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigInteger</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MAX_VALUE_28">MAX_VALUE_28</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigInteger</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MAX_VALUE_38">MAX_VALUE_38</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigDecimal</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MAX_VALUE_LONG_BD">MAX_VALUE_LONG_BD</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigInteger</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MAX_VALUE_LONG_BI">MAX_VALUE_LONG_BI</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigDecimal</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MIN_VALUE_LONG_BD">MIN_VALUE_LONG_BD</a></strong></code> </td>
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<td class="colFirst"><code>private static java.math.BigInteger</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#MIN_VALUE_LONG_BI">MIN_VALUE_LONG_BI</a></strong></code> </td>
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<td class="colFirst"><code>private static java.sql.Time</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#TIME_ZERO">TIME_ZERO</a></strong></code> </td>
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<td class="colFirst"><code>private static java.util.HashMap</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#typeMap">typeMap</a></strong></code>
<div class="block">Convert java clases to java.sql.Type constant.</div>
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<td class="colFirst"><code>private </code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#Support()">Support</a></strong>()</code> </td>
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<td class="colFirst"><code>(package private) static int</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#calculateNamedPipeBufferSize(int, int)">calculateNamedPipeBufferSize</a></strong>(int tdsVersion,
int packetSize)</code>
<div class="block">Calculate the buffer size to use when buffering the <code>InputStream</code>
for named pipes.</div>
</td>
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<tr class="rowColor">
<td class="colFirst"><code>(package private) static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#castNumeric(java.lang.Object, int, int)">castNumeric</a></strong>(java.lang.Object orig,
int sourceType,
int targetType)</code> </td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#convert(java.lang.Object, java.lang.Object, int, java.lang.String)">convert</a></strong>(java.lang.Object callerReference,
java.lang.Object x,
int jdbcType,
java.lang.String charSet)</code>
<div class="block">Convert an existing data object to the specified JDBC type.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#convertLOB(java.lang.Object)">convertLOB</a></strong>(java.lang.Object value)</code>
<div class="block">Converts a LOB to the equivalent Java type, i.e.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#convertLOBType(int)">convertLOBType</a></strong>(int type)</code>
<div class="block">Converts a LOB type constant to the equivalent Java type constant, i.e.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static void</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#embedData(java.lang.StringBuilder, java.lang.Object, boolean, net.sourceforge.jtds.jdbc.JtdsConnection)">embedData</a></strong>(java.lang.StringBuilder buf,
java.lang.Object value,
boolean isUnicode,
<a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc">JtdsConnection</a> connection)</code>
<div class="block">Embed the data object as a string literal in the buffer supplied.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) static byte[]</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#encodeString(java.lang.String, java.lang.String)">encodeString</a></strong>(java.lang.String cs,
java.lang.String value)</code>
<div class="block">Encode a string into a byte array using the specified character set.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getClassName(int)">getClassName</a></strong>(int jdbcType)</code>
<div class="block">Retrieve the fully qualified java class name for the
supplied JDBC Types constant.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>private static <a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc">JtdsConnection</a></code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getConnection(java.lang.Object)">getConnection</a></strong>(java.lang.Object callerReference)</code>
<div class="block">Returns the connection for a given <code>ResultSet</code>,
<code>Statement</code> or <code>Connection</code> object.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static int</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getJdbcType(java.lang.Class)">getJdbcType</a></strong>(java.lang.Class typeClass)</code>
<div class="block">Get the JDBC type constant which matches the supplied <code>Class</code>.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) static int</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getJdbcType(java.lang.Object)">getJdbcType</a></strong>(java.lang.Object value)</code>
<div class="block">Get the JDBC type constant which matches the supplied Object type.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getJdbcTypeName(int)">getJdbcTypeName</a></strong>(int jdbcType)</code>
<div class="block">Get a String describing the supplied JDBC type constant.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getParameterDefinitions(net.sourceforge.jtds.jdbc.ParamInfo[])">getParameterDefinitions</a></strong>(<a href="../../../../net/sourceforge/jtds/jdbc/ParamInfo.html" title="class in net.sourceforge.jtds.jdbc">ParamInfo</a>[] parameters)</code>
<div class="block">Constructs a parameter definition string for use with
sp_executesql, sp_prepare, sp_prepexec, sp_cursoropen,
sp_cursorprepare and sp_cursorprepexec.</div>
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</tr>
<tr class="rowColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#getStatementKey(java.lang.String, net.sourceforge.jtds.jdbc.ParamInfo[], int, java.lang.String, boolean, boolean)">getStatementKey</a></strong>(java.lang.String sql,
<a href="../../../../net/sourceforge/jtds/jdbc/ParamInfo.html" title="class in net.sourceforge.jtds.jdbc">ParamInfo</a>[] params,
int serverType,
java.lang.String catalog,
boolean autoCommit,
boolean cursor)</code>
<div class="block">Generates a unique statement key for a given SQL statement.</div>
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<tr class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#isWindowsOS()">isWindowsOS</a></strong>()</code>
<div class="block">Checks the <code>os.name</code> system property to see if it starts
with "windows".</div>
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<tr class="rowColor">
<td class="colFirst"><code>static java.lang.Throwable</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#linkException(java.lang.Exception, java.lang.Throwable)">linkException</a></strong>(java.lang.Exception exception,
java.lang.Throwable cause)</code>
<div class="block">Link the original cause to an <code>Exception</code>.</div>
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</tr>
<tr class="altColor">
<td class="colFirst"><code>static java.sql.SQLException</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#linkException(java.sql.SQLException, java.lang.Throwable)">linkException</a></strong>(java.sql.SQLException sqle,
java.lang.Throwable cause)</code>
<div class="block">Link the original cause to an <code>SQLException</code>.</div>
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</tr>
<tr class="rowColor">
<td class="colFirst"><code>static java.sql.SQLWarning</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#linkException(java.sql.SQLWarning, java.lang.Throwable)">linkException</a></strong>(java.sql.SQLWarning sqle,
java.lang.Throwable cause)</code>
<div class="block">Link the original cause to an <code>SQLWarning</code>.</div>
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<tr class="altColor">
<td class="colFirst"><code>(package private) static java.math.BigDecimal</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#normalizeBigDecimal(java.math.BigDecimal, int)">normalizeBigDecimal</a></strong>(java.math.BigDecimal value,
int maxPrecision)</code>
<div class="block">Normalize a BigDecimal value so that it fits within the
available precision.</div>
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<tr class="rowColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#substituteParameters(java.lang.String, net.sourceforge.jtds.jdbc.ParamInfo[], net.sourceforge.jtds.jdbc.JtdsConnection)">substituteParameters</a></strong>(java.lang.String sql,
<a href="../../../../net/sourceforge/jtds/jdbc/ParamInfo.html" title="class in net.sourceforge.jtds.jdbc">ParamInfo</a>[] list,
<a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc">JtdsConnection</a> connection)</code>
<div class="block">Substitute actual data for the parameter markers to simulate
parameter substitution in a PreparedStatement.</div>
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<tr class="altColor">
<td class="colFirst"><code>(package private) static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#substituteParamMarkers(java.lang.String, net.sourceforge.jtds.jdbc.ParamInfo[])">substituteParamMarkers</a></strong>(java.lang.String sql,
<a href="../../../../net/sourceforge/jtds/jdbc/ParamInfo.html" title="class in net.sourceforge.jtds.jdbc">ParamInfo</a>[] list)</code>
<div class="block">Update the SQL string and replace the ?</div>
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<tr class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#timeFromZone(java.util.Date, java.util.Calendar)">timeFromZone</a></strong>(java.util.Date value,
java.util.Calendar target)</code>
<div class="block">Convert a timestamp from a different Timezone.</div>
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<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#timeToZone(java.util.Date, java.util.Calendar)">timeToZone</a></strong>(java.util.Date value,
java.util.Calendar target)</code>
<div class="block">Convert a timestamp to a different Timezone.</div>
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<tr class="rowColor">
<td class="colFirst"><code>static java.lang.String</code></td>
<td class="colLast"><code><strong><a href="../../../../net/sourceforge/jtds/jdbc/Support.html#toHex(byte[])">toHex</a></strong>(byte[] bytes)</code>
<div class="block">Convert a byte[] object to a hex string.</div>
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<pre>private static final char[] hex</pre>
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<pre>public static java.lang.String toHex(byte[] bytes)</pre>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>bytes</code> - The byte array to convert.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The hex equivalent as a <code>String</code>.</dd></dl>
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<pre>static java.math.BigDecimal normalizeBigDecimal(java.math.BigDecimal value,
int maxPrecision)
throws java.sql.SQLException</pre>
<div class="block">Normalize a BigDecimal value so that it fits within the
available precision.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>value</code> - The decimal value to normalize.</dd><dd><code>maxPrecision</code> - The decimal precision supported by the server
(assumed to be a value of either 28 or 38).</dd>
<dt><span class="strong">Returns:</span></dt><dd>The possibly normalized decimal value as a <code>BigDecimal</code>.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.sql.SQLException</code> - If the number is too big.</dd></dl>
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<div class="block">Convert an existing data object to the specified JDBC type.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>callerReference</code> - an object reference to the caller of this method;
must be a <code>Connection</code>,
<code>Statement</code> or <code>ResultSet</code></dd><dd><code>x</code> - the data object to convert</dd><dd><code>jdbcType</code> - the required type constant from
<code>java.sql.Types</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>the converted data object</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.sql.SQLException</code> - if the conversion is not supported or fails</dd></dl>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>value</code> - The object to analyse.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The JDBC type constant as an <code>int</code>.</dd></dl>
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<pre>static int getJdbcType(java.lang.Class typeClass)</pre>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>typeClass</code> - the <code>Class</code> to analyse</dd>
<dt><span class="strong">Returns:</span></dt><dd>the JDBC type constant as an <code>int</code></dd></dl>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>jdbcType</code> - The constant to be decoded.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The text decode of the type constant as a <code>String</code>.</dd></dl>
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<pre>static java.lang.String getClassName(int jdbcType)</pre>
<div class="block">Retrieve the fully qualified java class name for the
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>jdbcType</code> - The JDBC Types constant.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The fully qualified java class name as a <code>String</code>.</dd></dl>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>buf</code> - The buffer in which the data will be embedded.</dd><dd><code>value</code> - The data object.</dd><dd><code>isUnicode</code> - Set to <code>true</code> if Unicode strings should be used, else <code>false</code>.</dd><dd><code>connection</code> - The <a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc"><code>JtdsConnection</code></a> object.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.sql.SQLException</code></dd></dl>
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int serverType,
java.lang.String catalog,
boolean autoCommit,
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<div class="block">Generates a unique statement key for a given SQL statement.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - the sql statement to generate the key for</dd><dd><code>params</code> - the statement parameters</dd><dd><code>serverType</code> - the type of server to generate the key for</dd><dd><code>catalog</code> - the catalog is required for uniqueness on Microsoft
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>parameters</code> - Parameters to construct the definition for</dd>
<dt><span class="strong">Returns:</span></dt><dd>a parameter definition string</dd></dl>
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<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - the SQL containing markers to substitute</dd><dd><code>list</code> - the parameter list</dd>
<dt><span class="strong">Returns:</span></dt><dd>the modified SQL as a <code>String</code></dd></dl>
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<pre>static java.lang.String substituteParameters(java.lang.String sql,
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<a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc">JtdsConnection</a> connection)
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<div class="block">Substitute actual data for the parameter markers to simulate
parameter substitution in a PreparedStatement.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sql</code> - The SQL containing parameter markers to substitute.</dd><dd><code>list</code> - The parameter descriptors.</dd><dd><code>connection</code> - The current connection.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The modified SQL statement.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.sql.SQLException</code></dd></dl>
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<h4>encodeString</h4>
<pre>static byte[] encodeString(java.lang.String cs,
java.lang.String value)</pre>
<div class="block">Encode a string into a byte array using the specified character set.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>cs</code> - The Charset name.</dd><dd><code>value</code> - The value to encode.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The value of the String as a <code>byte[]</code>.</dd></dl>
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<h4>linkException</h4>
<pre>public static java.sql.SQLWarning linkException(java.sql.SQLWarning sqle,
java.lang.Throwable cause)</pre>
<div class="block">Link the original cause to an <code>SQLWarning</code>.
<p>
This convenience method calls <a href="../../../../net/sourceforge/jtds/jdbc/Support.html#linkException(java.lang.Exception, java.lang.Throwable)"><code>linkException(Exception, Throwable)</code></a>
and casts the result for cleaner code elsewhere.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sqle</code> - The <code>SQLWarning</code> to enhance.</dd><dd><code>cause</code> - The <code>Throwable</code> to link.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The original <code>SQLWarning</code> object.</dd></dl>
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<pre>public static java.sql.SQLException linkException(java.sql.SQLException sqle,
java.lang.Throwable cause)</pre>
<div class="block">Link the original cause to an <code>SQLException</code>.
<p>
This convenience method calls <a href="../../../../net/sourceforge/jtds/jdbc/Support.html#linkException(java.lang.Exception, java.lang.Throwable)"><code>linkException(Exception, Throwable)</code></a>
and casts the result for cleaner code elsewhere.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>sqle</code> - The <code>SQLException</code> to enhance.</dd><dd><code>cause</code> - The <code>Throwable</code> to link.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The original <code>SQLException</code> object.</dd></dl>
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<pre>public static java.lang.Throwable linkException(java.lang.Exception exception,
java.lang.Throwable cause)</pre>
<div class="block">Link the original cause to an <code>Exception</code>.
<p>
If running under JVM 1.4+ the <code>Throwable.initCause(Throwable)</code>
method will be invoked to chain the exception, else the exception is
logged via the <a href="../../../../net/sourceforge/jtds/util/Logger.html" title="class in net.sourceforge.jtds.util"><code>Logger</code></a> class.
Modeled after the code written by Brian Heineman.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>exception</code> - The <code>Exception</code> to enhance.</dd><dd><code>cause</code> - The <code>Throwable</code> to link.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The original <code>Exception</code> object.</dd></dl>
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<a name="timeToZone(java.util.Date, java.util.Calendar)">
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<pre>public static long timeToZone(java.util.Date value,
java.util.Calendar target)</pre>
<div class="block">Convert a timestamp to a different Timezone.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>value</code> - the timestamp value</dd><dd><code>target</code> - the <code>Calendar</code> containing the TimeZone</dd>
<dt><span class="strong">Returns:</span></dt><dd>the new timestamp value as a <code>long</code></dd></dl>
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<pre>public static long timeFromZone(java.util.Date value,
java.util.Calendar target)</pre>
<div class="block">Convert a timestamp from a different Timezone.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>value</code> - the timestamp value.</dd><dd><code>target</code> - the Calendar containing the TimeZone.</dd>
<dt><span class="strong">Returns:</span></dt><dd>The new timestamp value as a <code>long</code>.</dd></dl>
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<h4>convertLOB</h4>
<pre>public static java.lang.Object convertLOB(java.lang.Object value)
throws java.sql.SQLException</pre>
<div class="block">Converts a LOB to the equivalent Java type, i.e. <code>Clob</code> to
<code>String</code> and <code>Blob</code> to <code>byte[]</code>. If the
value passed is not a LOB object, it is left unchanged and no exception
is thrown; the idea is to transparently convert only LOBs.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>value</code> - an object that may be a LOB</dd>
<dt><span class="strong">Returns:</span></dt><dd>if the value was a LOB, the equivalent Java object, otherwise
the original value</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.sql.SQLException</code> - if an error occurs while reading the LOB contents</dd></dl>
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<h4>convertLOBType</h4>
<pre>public static int convertLOBType(int type)</pre>
<div class="block">Converts a LOB type constant to the equivalent Java type constant, i.e.
<code>Types.CLOB</code> to <code>Types.LONGVARCHAR</code> and
<code>Types.BLOB</code> to <code>Types.LONGVARBINARY</code>. If the
type passed is not that of a LOB, it is left unchanged and no exception
is thrown; the idea is to transparently convert only LOB types.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>type</code> - a <code>Types</code> constant defining a JDBC type, possibly a
LOB</dd>
<dt><span class="strong">Returns:</span></dt><dd>if the type was that of a LOB, the equivalent Java object type,
otherwise the original type</dd></dl>
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<h4>isWindowsOS</h4>
<pre>public static boolean isWindowsOS()</pre>
<div class="block">Checks the <code>os.name</code> system property to see if it starts
with "windows".</div>
<dl><dt><span class="strong">Returns:</span></dt><dd><code>true</code> if <code>os.name</code> starts with "windows",
else <code>false</code>.</dd></dl>
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<h4>getConnection</h4>
<pre>private static <a href="../../../../net/sourceforge/jtds/jdbc/JtdsConnection.html" title="class in net.sourceforge.jtds.jdbc">JtdsConnection</a> getConnection(java.lang.Object callerReference)</pre>
<div class="block">Returns the connection for a given <code>ResultSet</code>,
<code>Statement</code> or <code>Connection</code> object.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>callerReference</code> - an object reference to the caller of this method;
must be a <code>Connection</code>, <code>Statement</code> or
<code>ResultSet</code></dd>
<dt><span class="strong">Returns:</span></dt><dd>a connection</dd></dl>
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<h4>calculateNamedPipeBufferSize</h4>
<pre>static int calculateNamedPipeBufferSize(int tdsVersion,
int packetSize)</pre>
<div class="block">Calculate the buffer size to use when buffering the <code>InputStream</code>
for named pipes.
<p/>
The buffer size is tied directly to the packet size because each request
to the <code>SmbNamedPipe</code> will send a request for a particular
size of packet. In other words, if you only request 1 byte, the
<code>SmbNamedPipe</code> will send a request out and only ask for 1 byte
back. Buffering the expected packet size ensures that all of the data
will be returned in the buffer without wasting any space.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>tdsVersion</code> - the TDS version for the connection</dd><dd><code>packetSize</code> - requested packet size for the connection</dd>
<dt><span class="strong">Returns:</span></dt><dd>minimum default packet size if <code>packetSize == 0</code>,
else <code>packetSize</code></dd></dl>
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