JDK14/Java14源码在线阅读

/*
 * Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 */

package java.sql;

/**
 * An exception  thrown as a <code>DataTruncation</code> exception
 * (on writes) or reported as a
 * <code>DataTruncation</code> warning (on reads)
 *  when a data values is unexpectedly truncated for reasons other than its having
 *  exceeded <code>MaxFieldSize</code>.
 *
 * <P>The SQLstate for a <code>DataTruncation</code> during read is <code>01004</code>.
 * <P>The SQLstate for a <code>DataTruncation</code> during write is <code>22001</code>.
 *
 * @since 1.1
 */

public class DataTruncation extends SQLWarning {

    /**
     * Creates a <code>DataTruncation</code> object
     * with the SQLState initialized
     * to 01004 when <code>read</code> is set to <code>true</code> and 22001
     * when <code>read</code> is set to <code>false</code>,
     * the reason set to "Data truncation", the
     * vendor code set to 0, and
     * the other fields set to the given values.
     * The <code>cause</code> is not initialized, and may subsequently be
     * initialized by a call to the
     * {@link Throwable#initCause(java.lang.Throwable)} method.
     *
     * @param index The index of the parameter or column value
     * @param parameter true if a parameter value was truncated
     * @param read true if a read was truncated
     * @param dataSize the original size of the data
     * @param transferSize the size after truncation
     */
    public DataTruncation(int index, boolean parameter,
                          boolean read, int dataSize,
                          int transferSize) {
        super("Data truncation", read == true?"01004":"22001");
        this.index = index;
        this.parameter = parameter;
        this.read = read;
        this.dataSize = dataSize;
        this.transferSize = transferSize;

    }

    /**
     * Creates a <code>DataTruncation</code> object
     * with the SQLState initialized
     * to 01004 when <code>read</code> is set to <code>true</code> and 22001
     * when <code>read</code> is set to <code>false</code>,
     * the reason set to "Data truncation", the
     * vendor code set to 0, and
     * the other fields set to the given values.
     *
     * @param index The index of the parameter or column value
     * @param parameter true if a parameter value was truncated
     * @param read true if a read was truncated
     * @param dataSize the original size of the data
     * @param transferSize the size after truncation
     * @param cause the underlying reason for this <code>DataTruncation</code>
     * (which is saved for later retrieval by the <code>getCause()</code> method);
     * may be null indicating the cause is non-existent or unknown.
     *
     * @since 1.6
     */
    public DataTruncation(int index, boolean parameter,
                          boolean read, int dataSize,
                          int transferSize, Throwable cause) {
        super("Data truncation", read == true?"01004":"22001",cause);
        this.index = index;
        this.parameter = parameter;
        this.read = read;
        this.dataSize = dataSize;
        this.transferSize = transferSize;
    }

    /**
     * Retrieves the index of the column or parameter that was truncated.
     *
     * <P>This may be -1 if the column or parameter index is unknown, in
     * which case the <code>parameter</code> and <code>read</code> fields should be ignored.
     *
     * @return the index of the truncated parameter or column value
     */
    public int getIndex() {
        return index;
    }

    /**
     * Indicates whether the value truncated was a parameter value or
         * a column value.
     *
     * @return <code>true</code> if the value truncated was a parameter;
         *         <code>false</code> if it was a column value
     */
    public boolean getParameter() {
        return parameter;
    }

    /**
     * Indicates whether or not the value was truncated on a read.
     *
     * @return <code>true</code> if the value was truncated when read from
         *         the database; <code>false</code> if the data was truncated on a write
     */
    public boolean getRead() {
        return read;
    }

    /**
     * Gets the number of bytes of data that should have been transferred.
     * This number may be approximate if data conversions were being
     * performed.  The value may be <code>-1</code> if the size is unknown.
     *
     * @return the number of bytes of data that should have been transferred
     */
    public int getDataSize() {
        return dataSize;
    }

    /**
     * Gets the number of bytes of data actually transferred.

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