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/**
* Standard interfaces and base classes for JDBC {@code RowSet}
* implementations. This package contains interfaces and classes
* that a standard {@code RowSet} implementation either implements or extends.
*
* <h2>Table of Contents</h2>
* <ul>
* <li><a href="#pkgspec">1.0 Package Specification</a>
* <li><a href="#stdrowset">2.0 Standard RowSet Definitions</a>
* <li><a href="#impl">3.0 Implementer's Guide</a>
* <li><a href="#relspec">4.0 Related Specifications</a>
* <li><a href="#reldocs">5.0 Related Documentation</a>
* </ul>
*
* <h3><a id="pkgspec">1.0 Package Specification</a></h3>
* This package specifies five standard JDBC {@code RowSet} interfaces.
* All five extend the
* <a href="{@docRoot}/java.sql/javax/sql/RowSet.html">RowSet</a> interface described in the JDBC 3.0
* specification. It is anticipated that additional definitions
* of more specialized JDBC {@code RowSet} types will emerge as this technology
* matures. Future definitions <i>should</i> be specified as subinterfaces using
* inheritance similar to the way it is used in this specification.
* <p>
* <i>Note:</i> The interface definitions provided in this package form the basis for
* all compliant JDBC {@code RowSet} implementations. Vendors and more advanced
* developers who intend to provide their own compliant {@code RowSet} implementations
* should pay particular attention to the assertions detailed in specification
* interfaces.
*
* <h3><a id="stdrowset">2.0 Standard RowSet Definitions</a></h3>
* <ul>
* <li><a href="JdbcRowSet.html"><b>{@code JdbcRowSet}</b></a> - A wrapper around
* a {@code ResultSet} object that makes it possible to use the result set as a
* JavaBeans™ component. Thus,
* a {@code JdbcRowSet} object can be a Bean that any tool
* makes available for assembling an application as part of a component based
* architecture. A {@code JdbcRowSet} object is a connected {@code RowSet}
* object, that is, it
* <b>must</b> continually maintain its connection to its data source using a JDBC
* technology-enabled driver ("JDBC driver"). In addition, a {@code JdbcRowSet}
* object provides a fully updatable and scrollable tabular
* data structure as defined in the JDBC 3.0 specification.
*
* <li><a href="CachedRowSet.html">
* <b>{@code CachedRowSet}™</b></a>
* - A {@code CachedRowSet} object is a JavaBeans™
* component that is scrollable, updatable, serializable, and generally disconnected from
* the source of its data. A {@code CachedRowSet} object
* typically contains rows from a result set, but it can also contain rows from any
* file with a tabular format, such as a spreadsheet. {@code CachedRowSet} implementations
* <b>must</b> use the {@code SyncFactory} to manage and obtain pluggable
* {@code SyncProvider} objects to provide synchronization between the
* disconnected {@code RowSet} object and the originating data source.
* Typically a {@code SyncProvider} implementation relies upon a JDBC
* driver to obtain connectivity to a particular data source.
* Further details on this mechanism are discussed in the <a
* href="spi/package-summary.html">{@code javax.sql.rowset.spi}</a> package
* specification.
*
* <li><a href="WebRowSet.html"><b>{@code WebRowSet}</b></a> - A
* {@code WebRowSet} object is an extension of {@code CachedRowSet}
* that can read and write a {@code RowSet} object in a well formed XML format.
* This class calls an <a href="spi/XmlReader.html">{@code XmlReader}</a> object
* (an extension of the <a href="{@docRoot}/java.sql/javax/sql/RowSetReader.html">{@code RowSetReader}</a>
* interface) to read a rowset in XML format. It calls an
* <a href="spi/XmlWriter.html">{@code XmlWriter}</a> object (an extension of the
* <a href="{@docRoot}/java.sql/javax/sql/RowSetWriter.html">{@code RowSetWriter}</a> interface)
* to write a rowset in XML format. The reader and writer required by
* {@code WebRowSet} objects are provided by the
* {@code SyncFactory} in the form of {@code SyncProvider}
* implementations. In order to ensure well formed XML usage, a standard generic XML
* Schema is defined and published at
* <a href="http://xmlns.jcp.org/xml/ns//jdbc/webrowset.xsd">
* {@code http://xmlns.jcp.org/xml/ns//jdbc/webrowset.xsd}</a>.
*
* <li><a href="FilteredRowSet.html"><b>{@code FilteredRowSet}</b></a> - A
* {@code FilteredRowSet} object provides filtering functionality in a programmatic
* and extensible way. There are many instances when a {@code RowSet} {@code object}
* has a need to provide filtering in its contents without sacrificing the disconnected
* environment, thus saving the expense of having to create a connection to the data source.
* Solutions to this need vary from providing heavyweight full scale
* SQL query abilities, to portable components, to more lightweight
* approaches. A {@code FilteredRowSet} object consumes
* an implementation of the <a href="Predicate.html">{@code Predicate}</a>
* interface, which <b>may</b> define a filter at run time. In turn, a
* {@code FilteredRowSet} object is tasked with enforcing the set filter for both
* inbound and outbound read and write operations. That is, all filters can be
* considered as bi-directional. No standard filters are defined;
* however, sufficient mechanics are specified to permit any required filter to be
* implemented.
*
* <li><a href="JoinRowSet.html"><b>{@code JoinRowSet}</b></a> - The {@code JoinRowSet}
* interface describes a mechanism by which relationships can be established between
* two or more standard {@code RowSet} implementations. Any number of {@code RowSet}
* objects can be added to a {@code JoinRowSet} object provided the {@code RowSet}objects
* can be related in a SQL {@code JOIN} like fashion. By definition, the SQL {@code JOIN}
* statement is used to combine the data contained in two (<i>or more</i>) relational
* database tables based upon a common attribute. By establishing and then enforcing
* column matches, a {@code JoinRowSet} object establishes relationships between
* {@code RowSet} instances without the need to touch the originating data source.
* </ul>
*
* <h3><a id="impl">3.0 Implementer's Guide</a></h3>
* Compliant implementations of JDBC {@code RowSet} Implementations
* <b>must</b> follow the assertions described in this specification. In accordance
* with the terms of the <a href="http://www.jcp.org">Java Community Process</a>, a
* Test Compatibility Kit (TCK) can be licensed to ensure compatibility with the
* specification. The following paragraphs outline a number of starting points for
* implementers of the standard JDBC {@code RowSet} definitions. Implementers
* should also consult the <i>Implementer's Guide</i> in the <a
* href="spi/package-summary.html">javax.sql.rowset.spi</a> package for guidelines
* on <a href="spi/SyncProvider.html">{@code SyncProvider}</a> implementations.
*
* <ul>
* <li><b>3.1 Constructor</b>
* <p>
* All {@code RowSet} implementations <strong>must</strong> provide a
* no-argument constructor.
* </li>
* <li><b>3.2 Role of the {@code BaseRowSet} Class</b>
* <p>
* A compliant JDBC {@code RowSet} implementation <b>must</b> implement one or more
* standard interfaces specified in this package and <b>may</b> extend the
* <a href="BaseRowSet.html">{@code BaseRowSet}</a> abstract class. For example, a
* {@code CachedRowSet} implementation must implement the {@code CachedRowSet}
* interface and extend the {@code BaseRowSet} abstract class. The
* {@code BaseRowSet} class provides the standard architecture on which all
* {@code RowSet} implementations should be built, regardless of whether the
* {@code RowSet} objects exist in a connected or disconnected environment.
* The {@code BaseRowSet} abstract class provides any {@code RowSet} implementation
* with its base functionality, including property manipulation and event notification
* that is fully compliant with
* <a href="https://www.oracle.com/technetwork/java/javase/documentation/spec-136004.html">JavaBeans</a>
* component requirements. As an example, all implementations provided in the
* reference implementations (contained in the {@code com.sun.rowset} package) use
* the {@code BaseRowSet} class as a basis for their implementations.
* <P>
* The following table illustrates the features that the {@code BaseRowSet}
* abstract class provides.
* <blockquote>
* <table class="striped" style="vertical-align:top; width:75%">
* <caption>Features in {@code BaseRowSet}</caption>
* <thead>
* <tr>
* <th scope="col">Feature</th>
* <th scope="col">Details</th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <th scope="row">Properties</th>
* <td>Provides standard JavaBeans property manipulation
* mechanisms to allow applications to get and set {@code RowSet} command and
* property values. Refer to the documentation of the {@code javax.sql.RowSet}
* interface (available in the JDBC 3.0 specification) for more details on
* the standard {@code RowSet} properties.</td>
* </tr>
* <tr>
* <th scope="row">Event notification</th>
* <td>Provides standard JavaBeans event notifications
* to registered event listeners. Refer to the documentation of {@code javax.sql.RowSetEvent}
* interface (available in the JDBC 3.0 specification) for
* more details on how to register and handle standard RowSet events generated
* by compliant implementations.</td>
* </tr>
* <tr>
* <th scope="row">Setters for a RowSet object's command</th>
* <td>Provides a complete set of setter methods
* for setting RowSet command parameters.</td>
* </tr>
* <tr>
* <th scope="row">Streams</th>
* <td>Provides fields for storing of stream instances
* in addition to providing a set of constants for stream type designation.</td>
* </tr>
* </tbody>
* </table>
* </blockquote>
*
* <li><b>3.3 Connected RowSet Requirements</b>
* <p>
* The {@code JdbcRowSet} describes a {@code RowSet} object that <b>must</b> always
* be connected to the originating data source. Implementations of the {@code JdbcRowSet}
* should ensure that this connection is provided solely by a JDBC driver.
* Furthermore, {@code RowSet} objects that are implementations of the
* {@code JdbcRowSet} interface and are therefore operating in a connected environment
* do not use the {@code SyncFactory} to obtain a {@code RowSetReader} object
* or a {@code RowSetWriter} object. They can safely rely on the JDBC driver to
* supply their needs by virtue of the presence of an underlying updatable and scrollable
* {@code ResultSet} implementation.
*
* <li>
* <b>3.4 Disconnected RowSet Requirements</b>
* <p>
* A disconnected {@code RowSet} object, such as a {@code CachedRowSet} object,
* <b>should</b> delegate
* connection management to a {@code SyncProvider} object provided by the
* {@code SyncFactory}. To ensure fully disconnected semantics, all
* disconnected {@code RowSet} objects <b>must</b> ensure
* that the original connection made to the data source to populate the {@code RowSet}
* object is closed to permit the garbage collector to recover and release resources. The
* {@code SyncProvider} object ensures that the critical JDBC properties are
* maintained in order to re-establish a connection to the data source when a
* synchronization is required. A disconnected {@code RowSet} object should
* therefore ensure that no
* extraneous references remain on the {@code Connection} object.
*
* <li><b>3.5 Role of RowSetMetaDataImpl</b>
* <p>
* The {@code RowsetMetaDataImpl} class is a utility class that provides an implementation of the
* <a href="{@docRoot}/java.sql/javax/sql/RowSetMetaData.html">RowSetMetaData</a> interface, supplying standard setter
* method implementations for metadata for both connected and disconnected
* {@code RowSet} objects. All implementations are free to use this standard
* implementation but are not required to do so.
*
* <li><b>3.6 RowSetWarning Class</b>
* <p>
* The {@code RowSetWarning} class provides warnings that can be set
* on {@code RowSet} implementations.
* Similar to <a href="{@docRoot}/java.sql/java/sql/SQLWarning.html">SQLWarning</a> objects,
* {@code RowSetWarning} objects are silently chained to the object whose method
* caused the warning to be thrown. All {@code RowSet} implementations <b>should</b>
* ensure that this chaining occurs if a warning is generated and also ensure that the
* warnings are available via the {@code getRowSetWarnings} method defined in either
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