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| <li>Summary: </li> |
| <li>Nested | </li> |
| <li><a href="#fields.inherited.from.class.org.eclipse.persistence.descriptors.FieldsLockingPolicy">Field</a> | </li> |
| <li><a href="#constructor.summary">Constr</a> | </li> |
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| <div class="subTitle">org.eclipse.persistence.descriptors</div> |
| <h2 title="Class ChangedFieldsLockingPolicy" class="title">Class ChangedFieldsLockingPolicy</h2> |
| </div> |
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| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">org.eclipse.persistence.descriptors.FieldsLockingPolicy</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.eclipse.persistence.descriptors.ChangedFieldsLockingPolicy</li> |
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| <dd><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io">Serializable</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Cloneable.html?is-external=true" title="class or interface in java.lang">Cloneable</a>, org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy</dd> |
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| <br> |
| <pre>public class <span class="typeNameLabel">ChangedFieldsLockingPolicy</span> |
| extends <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></pre> |
| <div class="block"><p><b>Purpose</b>: An implementation of the OptimisticLockingPolicy interface. |
| This policy compares only the changed fields in the WHERE clause |
| when doing an update. If any field has been changed, an optimistic |
| locking exception will be thrown. A delete will only compare |
| the primary key. <p> |
| NOTE: This policy can only be used inside a unit of work.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../serialized-form.html#org.eclipse.persistence.descriptors.ChangedFieldsLockingPolicy">Serialized Form</a></dd> |
| <dt><span class="simpleTagLabel">Author:</span></dt> |
| <dd>Peter Krogh</dd> |
| <dt><span class="simpleTagLabel">Since:</span></dt> |
| <dd>TopLink 2.1</dd> |
| </dl> |
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| </a> |
| <h3>Nested classes/interfaces inherited from interface org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy</h3> |
| <code>org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy.LockOnChange</code></li> |
| </ul> |
| </li> |
| </ul> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <h3>Field Summary</h3> |
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| <li class="blockList"><a name="fields.inherited.from.class.org.eclipse.persistence.descriptors.FieldsLockingPolicy"> |
| <!-- --> |
| </a> |
| <h3>Fields inherited from class org.eclipse.persistence.descriptors.<a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></h3> |
| <code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#allNonPrimaryKeyFields">allNonPrimaryKeyFields</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#descriptor">descriptor</a></code></li> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/ChangedFieldsLockingPolicy.html#ChangedFieldsLockingPolicy--">ChangedFieldsLockingPolicy</a></span>()</code> |
| <div class="block">PUBLIC: |
| Create a new changed fields locking policy.</div> |
| </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/ChangedFieldsLockingPolicy.html#addLockValuesToTranslationRow-org.eclipse.persistence.queries.ObjectLevelModifyQuery-">addLockValuesToTranslationRow</a></span>(<a href="../../../../org/eclipse/persistence/queries/ObjectLevelModifyQuery.html" title="class in org.eclipse.persistence.queries">ObjectLevelModifyQuery</a> query)</code> |
| <div class="block">INTERNAL: |
| Values to be included in the locking mechanism are added to the translation row.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/eclipse/persistence/expressions/Expression.html" title="class in org.eclipse.persistence.expressions">Expression</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/ChangedFieldsLockingPolicy.html#buildDeleteExpression-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.expressions.Expression-org.eclipse.persistence.internal.sessions.AbstractRecord-">buildDeleteExpression</a></span>(org.eclipse.persistence.internal.helper.DatabaseTable table, |
| <a href="../../../../org/eclipse/persistence/expressions/Expression.html" title="class in org.eclipse.persistence.expressions">Expression</a> mainExpression, |
| org.eclipse.persistence.internal.sessions.AbstractRecord row)</code> |
| <div class="block">INTERNAL: |
| When given an expression, this method will return a new expression with the optimistic |
| locking values included.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><org.eclipse.persistence.internal.helper.DatabaseField></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/eclipse/persistence/descriptors/ChangedFieldsLockingPolicy.html#getFieldsToCompare-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractRecord-">getFieldsToCompare</a></span>(org.eclipse.persistence.internal.helper.DatabaseTable table, |
| org.eclipse.persistence.internal.sessions.AbstractRecord transRow, |
| org.eclipse.persistence.internal.sessions.AbstractRecord modifyRow)</code> |
| <div class="block">INTERNAL: |
| Returns the fields that should be compared in the where clause.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.eclipse.persistence.descriptors.FieldsLockingPolicy"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.eclipse.persistence.descriptors.<a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></h3> |
| <code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#addLockFieldsToUpdateRow-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractSession-">addLockFieldsToUpdateRow</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#buildAllNonPrimaryKeyFields--">buildAllNonPrimaryKeyFields</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#buildExpression-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.expressions.ExpressionBuilder-">buildExpression</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#buildUpdateExpression-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.expressions.Expression-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractRecord-">buildUpdateExpression</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#clone--">clone</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#compareWriteLockValues-java.lang.Object-java.lang.Object-">compareWriteLockValues</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getAllNonPrimaryKeyFields--">getAllNonPrimaryKeyFields</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getAllNonPrimaryKeyFields-org.eclipse.persistence.internal.helper.DatabaseTable-">getAllNonPrimaryKeyFields</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getBaseValue--">getBaseValue</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getLockOnChangeMode--">getLockOnChangeMode</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getValueToPutInCache-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractSession-">getValueToPutInCache</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getVersionDifference-java.lang.Object-java.lang.Object-java.lang.Object-org.eclipse.persistence.internal.sessions.AbstractSession-">getVersionDifference</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getWriteLockField--">getWriteLockField</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getWriteLockUpdateExpression-org.eclipse.persistence.expressions.ExpressionBuilder-org.eclipse.persistence.internal.sessions.AbstractSession-">getWriteLockUpdateExpression</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getWriteLockValue-java.lang.Object-java.lang.Object-org.eclipse.persistence.internal.sessions.AbstractSession-">getWriteLockValue</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#initialize-org.eclipse.persistence.internal.sessions.AbstractSession-">initialize</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#initializeProperties--">initializeProperties</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#isCascaded--">isCascaded</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#isNewerVersion-org.eclipse.persistence.internal.sessions.AbstractRecord-java.lang.Object-java.lang.Object-org.eclipse.persistence.internal.sessions.AbstractSession-">isNewerVersion</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#isNewerVersion-java.lang.Object-java.lang.Object-java.lang.Object-org.eclipse.persistence.internal.sessions.AbstractSession-">isNewerVersion</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#isPrimaryKey-org.eclipse.persistence.internal.helper.DatabaseField-">isPrimaryKey</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#isStoredInCache--">isStoredInCache</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#mergeIntoParentCache-org.eclipse.persistence.internal.identitymaps.CacheKey-org.eclipse.persistence.internal.identitymaps.CacheKey-">mergeIntoParentCache</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#mergeIntoParentCache-org.eclipse.persistence.internal.sessions.UnitOfWorkImpl-java.lang.Object-java.lang.Object-">mergeIntoParentCache</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#setAllNonPrimaryKeyFields-java.util.List-">setAllNonPrimaryKeyFields</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#setDescriptor-org.eclipse.persistence.descriptors.ClassDescriptor-">setDescriptor</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#setLockOnChangeMode-org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy.LockOnChange-">setLockOnChangeMode</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#setupWriteFieldsForInsert-org.eclipse.persistence.queries.ObjectLevelModifyQuery-">setupWriteFieldsForInsert</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#shouldUpdateVersionOnMappingChange--">shouldUpdateVersionOnMappingChange</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#shouldUpdateVersionOnOwnedMappingChange--">shouldUpdateVersionOnOwnedMappingChange</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#supportsWriteLockValuesComparison--">supportsWriteLockValuesComparison</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#updateRowAndObjectForUpdate-org.eclipse.persistence.queries.ObjectLevelModifyQuery-java.lang.Object-">updateRowAndObjectForUpdate</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#validateDelete-int-java.lang.Object-org.eclipse.persistence.queries.DeleteObjectQuery-">validateDelete</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#validateUpdate-int-java.lang.Object-org.eclipse.persistence.queries.WriteObjectQuery-">validateUpdate</a>, <a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#verifyUsage-org.eclipse.persistence.internal.sessions.AbstractSession-">verifyUsage</a></code></li> |
| </ul> |
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| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
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| <div class="details"> |
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| <li class="blockList"> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
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| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
| </a> |
| <h3>Constructor Detail</h3> |
| <a name="ChangedFieldsLockingPolicy--"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>ChangedFieldsLockingPolicy</h4> |
| <pre>public ChangedFieldsLockingPolicy()</pre> |
| <div class="block">PUBLIC: |
| Create a new changed fields locking policy. |
| This locking policy is based on locking on all changed fields by comparing with |
| their previous values to detect field-level collisions. |
| |
| Note: the unit of work must be used for all updates when using field locking. Without |
| a unit of work, there is no way for to know what the original values were |
| without the back up clone in the unit of work.</div> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="addLockValuesToTranslationRow-org.eclipse.persistence.queries.ObjectLevelModifyQuery-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>addLockValuesToTranslationRow</h4> |
| <pre>public void addLockValuesToTranslationRow(<a href="../../../../org/eclipse/persistence/queries/ObjectLevelModifyQuery.html" title="class in org.eclipse.persistence.queries">ObjectLevelModifyQuery</a> query)</pre> |
| <div class="block">INTERNAL: |
| Values to be included in the locking mechanism are added to the translation row. |
| For changed fields the normal build row is ok as only changed fields matter.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>addLockValuesToTranslationRow</code> in interface <code>org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy</code></dd> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#addLockValuesToTranslationRow-org.eclipse.persistence.queries.ObjectLevelModifyQuery-">addLockValuesToTranslationRow</a></code> in class <code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="buildDeleteExpression-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.expressions.Expression-org.eclipse.persistence.internal.sessions.AbstractRecord-"> |
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| <h4>buildDeleteExpression</h4> |
| <pre>public <a href="../../../../org/eclipse/persistence/expressions/Expression.html" title="class in org.eclipse.persistence.expressions">Expression</a> buildDeleteExpression(org.eclipse.persistence.internal.helper.DatabaseTable table, |
| <a href="../../../../org/eclipse/persistence/expressions/Expression.html" title="class in org.eclipse.persistence.expressions">Expression</a> mainExpression, |
| org.eclipse.persistence.internal.sessions.AbstractRecord row)</pre> |
| <div class="block">INTERNAL: |
| When given an expression, this method will return a new expression with the optimistic |
| locking values included. The values are taken from the passed in database row. |
| This expression will be used in a delete call. |
| No new criteria will be added for changed fields.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code>buildDeleteExpression</code> in interface <code>org.eclipse.persistence.internal.descriptors.OptimisticLockingPolicy</code></dd> |
| <dt><span class="overrideSpecifyLabel">Overrides:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#buildDeleteExpression-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.expressions.Expression-org.eclipse.persistence.internal.sessions.AbstractRecord-">buildDeleteExpression</a></code> in class <code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></code></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="getFieldsToCompare-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractRecord-"> |
| <!-- --> |
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| <h4>getFieldsToCompare</h4> |
| <pre>protected <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><org.eclipse.persistence.internal.helper.DatabaseField> getFieldsToCompare(org.eclipse.persistence.internal.helper.DatabaseTable table, |
| org.eclipse.persistence.internal.sessions.AbstractRecord transRow, |
| org.eclipse.persistence.internal.sessions.AbstractRecord modifyRow)</pre> |
| <div class="block">INTERNAL: |
| Returns the fields that should be compared in the where clause. |
| In this case, it is only the fields that were changed.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html#getFieldsToCompare-org.eclipse.persistence.internal.helper.DatabaseTable-org.eclipse.persistence.internal.sessions.AbstractRecord-org.eclipse.persistence.internal.sessions.AbstractRecord-">getFieldsToCompare</a></code> in class <code><a href="../../../../org/eclipse/persistence/descriptors/FieldsLockingPolicy.html" title="class in org.eclipse.persistence.descriptors">FieldsLockingPolicy</a></code></dd> |
| </dl> |
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