org.apache.sis.util/org/apache/sis/util/collection/BackingStoreException.html - sis-site - Git at Google

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 <div class="sub-title"><span class="module-label-in-type">Module</span>&nbsp;<a href="../../../../../module-summary.html">org.apache.sis.util</a></div>
 <div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.apache.sis.util.collection</a></div>
 <h1 title="Class BackingStoreException" class="title">Class BackingStoreException</h1>
 </div>
 <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
 <div class="inheritance"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>
 <div class="inheritance"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Exception.html" title="class or interface in java.lang" class="external-link">Exception</a>
 <div class="inheritance"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link">RuntimeException</a>
 <div class="inheritance">BackingStoreException</div>
 </div>
 </div>
 </div>
 </div>
 <section class="class-description" id="class-description">
 <dl class="notes">
 <dt>All Implemented Interfaces:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/Serializable.html" title="class or interface in java.io" class="external-link">Serializable</a></code></dd>
 </dl>
 <hr>
 <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">BackingStoreException</span>
 <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link">RuntimeException</a></span></div>
 <div class="block">Thrown to indicate that an operation could not complete because of a failure in the backing store
  (a file or a database). This exception is thrown by implementations of API (collection, streams,
  <i>etc.</i> that are not allowed to throw checked exceptions.
  This exception usually has an <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/IOException.html" title="class or interface in java.io" class="external-link"><code>IOException</code></a> or a <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.sql/java/sql/SQLException.html" title="class or interface in java.sql" class="external-link"><code>SQLException</code></a> as its <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link">cause</a>.

  <p>This method provides a <a href="#unwrapOrRethrow(java.lang.Class)"><code>unwrapOrRethrow(Class)</code></a> convenience method which can be used
  for re-throwing the cause as in the example below. This allows client code to behave as if a
  <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/util/Collection.html" title="class or interface in java.util" class="external-link"><code>Collection</code></a> interface was allowed to declare checked exceptions.</p>


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 <pre class="snippet"><code class="language-java">    void myMethod() throws IOException {
         Collection c = ...;
         try {
             c.doSomeStuff();
         } catch (BackingStoreException e) {
             throw e.unwrapOrRethrow(IOException.class);
         }
     }
 </code></pre>
 </div>


  <h2 id="relationship-with-java-io-uncheckedioexception-heading">Relationship with <code>java.io.UncheckedIOException</code></h2>
  Java 8 provides a <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/io/UncheckedIOException.html" title="class or interface in java.io" class="external-link"><code>UncheckedIOException</code></a> which partially overlaps
  the purpose of this <code>BackingStoreException</code>. While Apache SIS still uses
  <code>BackingStoreException</code> as a general mechanism for any kind of checked exceptions,
  client code would be well advised to catch both kind of exceptions for robustness.</div>
 <dl class="notes">
 <dt>Since:</dt>
 <dd>0.3</dd>
 <dt>See Also:</dt>
 <dd>
 <ul class="tag-list">
 <li><a href="../../../../../../serialized-form.html#org.apache.sis.util.collection.BackingStoreException">Serialized Form</a></li>
 </ul>
 </dd>
 </dl>
 </section>
 <section class="summary">
 <ul class="summary-list">
 <!-- ======== CONSTRUCTOR SUMMARY ======== -->
 <li>
 <section class="constructor-summary" id="constructor-summary">
 <h2>Constructor Summary</h2>
 <div class="caption"><span>Constructors</span></div>
 <div class="summary-table two-column-summary">
 <div class="table-header col-first">Constructor</div>
 <div class="table-header col-last">Description</div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">BackingStoreException</a>()</code></div>
 <div class="col-last even-row-color">
 <div class="block">Constructs a new exception with no detail message.</div>
 </div>
 <div class="col-constructor-name odd-row-color"><code><a href="#%3Cinit%3E(java.lang.String)" class="member-name-link">BackingStoreException</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;message)</code></div>
 <div class="col-last odd-row-color">
 <div class="block">Constructs a new exception with the specified detail message.</div>
 </div>
 <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E(java.lang.String,java.lang.Throwable)" class="member-name-link">BackingStoreException</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;message,
  <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>&nbsp;cause)</code></div>
 <div class="col-last even-row-color">
 <div class="block">Constructs a new exception with the specified detail message and cause.</div>
 </div>
 <div class="col-constructor-name odd-row-color"><code><a href="#%3Cinit%3E(java.lang.Throwable)" class="member-name-link">BackingStoreException</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>&nbsp;cause)</code></div>
 <div class="col-last odd-row-color">
 <div class="block">Constructs a new exception with the specified cause.</div>
 </div>
 </div>
 </section>
 </li>
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 <div class="table-header col-first">Modifier and Type</div>
 <div class="table-header col-second">Method</div>
 <div class="table-header col-last">Description</div>
 <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>&lt;E extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Exception.html" title="class or interface in java.lang" class="external-link">Exception</a>&gt;<br>E</code></div>
 <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#unwrapOrRethrow(java.lang.Class)" class="member-name-link">unwrapOrRethrow</a><wbr>(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;E&gt;&nbsp;type)</code></div>
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 <div class="block">Returns the underlying <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link">cause</a> as an exception of the given type,
  or re-throw the exception.</div>
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 <h3 id="methods-inherited-from-class-Throwable">Methods inherited from class&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a></h3>
 <code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#addSuppressed(java.lang.Throwable)" title="class or interface in java.lang" class="external-link">addSuppressed</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#fillInStackTrace()" title="class or interface in java.lang" class="external-link">fillInStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link">getCause</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getLocalizedMessage()" title="class or interface in java.lang" class="external-link">getLocalizedMessage</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getMessage()" title="class or interface in java.lang" class="external-link">getMessage</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getStackTrace()" title="class or interface in java.lang" class="external-link">getStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getSuppressed()" title="class or interface in java.lang" class="external-link">getSuppressed</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#initCause(java.lang.Throwable)" title="class or interface in java.lang" class="external-link">initCause</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#printStackTrace()" title="class or interface in java.lang" class="external-link">printStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#printStackTrace(java.io.PrintStream)" title="class or interface in java.lang" class="external-link">printStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#printStackTrace(java.io.PrintWriter)" title="class or interface in java.lang" class="external-link">printStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#setStackTrace(java.lang.StackTraceElement%5B%5D)" title="class or interface in java.lang" class="external-link">setStackTrace</a>, <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#toString()" title="class or interface in java.lang" class="external-link">toString</a></code></div>
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 <h3 id="methods-inherited-from-class-Object">Methods inherited from class&nbsp;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
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 </section>
 </li>
 </ul>
 </section>
 <section class="details">
 <ul class="details-list">
 <!-- ========= CONSTRUCTOR DETAIL ======== -->
 <li>
 <section class="constructor-details" id="constructor-detail">
 <h2>Constructor Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="&lt;init&gt;()">
 <h3>BackingStoreException</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">BackingStoreException</span>()</div>
 <div class="block">Constructs a new exception with no detail message.</div>
 </section>
 </li>
 <li>
 <section class="detail" id="&lt;init&gt;(java.lang.String)">
 <h3>BackingStoreException</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">BackingStoreException</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;message)</span></div>
 <div class="block">Constructs a new exception with the specified detail message.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>message</code> - the detail message, saved for later retrieval by the <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getMessage()" title="class or interface in java.lang" class="external-link"><code>Throwable.getMessage()</code></a> method.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="&lt;init&gt;(java.lang.Throwable)">
 <h3>BackingStoreException</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">BackingStoreException</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>&nbsp;cause)</span></div>
 <div class="block">Constructs a new exception with the specified cause.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>cause</code> - the cause, saved for later retrieval by the <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link"><code>Throwable.getCause()</code></a> method.</dd>
 </dl>
 </section>
 </li>
 <li>
 <section class="detail" id="&lt;init&gt;(java.lang.String,java.lang.Throwable)">
 <h3>BackingStoreException</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">BackingStoreException</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a>&nbsp;message,
  <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html" title="class or interface in java.lang" class="external-link">Throwable</a>&nbsp;cause)</span></div>
 <div class="block">Constructs a new exception with the specified detail message and cause.</div>
 <dl class="notes">
 <dt>Parameters:</dt>
 <dd><code>message</code> - the detail message, saved for later retrieval by the <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getMessage()" title="class or interface in java.lang" class="external-link"><code>Throwable.getMessage()</code></a> method.</dd>
 <dd><code>cause</code> - the cause, saved for later retrieval by the <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link"><code>Throwable.getCause()</code></a> method.</dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 <!-- ============ METHOD DETAIL ========== -->
 <li>
 <section class="method-details" id="method-detail">
 <h2>Method Details</h2>
 <ul class="member-list">
 <li>
 <section class="detail" id="unwrapOrRethrow(java.lang.Class)">
 <h3>unwrapOrRethrow</h3>
 <div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="type-parameters">&lt;E extends <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Exception.html" title="class or interface in java.lang" class="external-link">Exception</a>&gt;</span>&nbsp;<span class="return-type">E</span>&nbsp;<span class="element-name">unwrapOrRethrow</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Class.html" title="class or interface in java.lang" class="external-link">Class</a>&lt;E&gt;&nbsp;type)</span>
                                         throws <span class="exceptions"><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link">RuntimeException</a>,
 <a href="BackingStoreException.html" title="class in org.apache.sis.util.collection">BackingStoreException</a></span></div>
 <div class="block">Returns the underlying <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getCause()" title="class or interface in java.lang" class="external-link">cause</a> as an exception of the given type,
  or re-throw the exception. More specifically, this method makes the following choices:

  <ul>
    <li>If the cause <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Class.html#isInstance(java.lang.Object)" title="class or interface in java.lang" class="external-link">is an instance</a> of the given type, returns the cause.</li>
    <li>Otherwise if the cause is an instance of <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link"><code>RuntimeException</code></a>, throws that exception.</li>
    <li>Otherwise re-throws <code>this</code>.</li>
  </ul>

  This method should be used as in the example below:


 <div class="snippet-container"><button class="copy snippet-copy" aria-label="Copy snippet" onclick="copySnippet(this)"><span data-copied="Copied!">Copy</span><img src="../../../../../../copy.svg" alt="Copy snippet"></button>
 <pre class="snippet"><code class="language-java">    void myMethod() throws IOException {
         Collection c = ...;
         try {
             c.doSomeStuff();
         } catch (BackingStoreException e) {
             throw e.unwrapOrRethrow(IOException.class);
         }
     }
 </code></pre>
 </div>


  If this exception has <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Throwable.html#getSuppressed()" title="class or interface in java.lang" class="external-link">suppressed exceptions</a> and this method decided
  that this exception should be discarded in favor of <code>&lt;E&gt;</code> or <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link"><code>RuntimeException</code></a> cause,
  then this method copies the suppressed exceptions into the cause before to throw the cause.</div>
 <dl class="notes">
 <dt>Type Parameters:</dt>
 <dd><code>E</code> - the type of the exception to unwrap.</dd>
 <dt>Parameters:</dt>
 <dd><code>type</code> - the type of the exception to unwrap.</dd>
 <dt>Returns:</dt>
 <dd>the cause as an exception of the given type (never <code>null</code>).</dd>
 <dt>Throws:</dt>
 <dd><code><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link">RuntimeException</a></code> - if the cause is an instance of <code>RuntimeException</code>,
          in which case that instance is re-thrown.</dd>
 <dd><code><a href="BackingStoreException.html" title="class in org.apache.sis.util.collection">BackingStoreException</a></code> - if the cause is neither the given type or an instance
          of <a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/RuntimeException.html" title="class or interface in java.lang" class="external-link"><code>RuntimeException</code></a>, in which case <code>this</code> exception is re-thrown.</dd>
 </dl>
 </section>
 </li>
 </ul>
 </section>
 </li>
 </ul>
 </section>
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