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<div class="subTitle"><span class="packageLabelInType">Package</span>&nbsp;<a href="package-summary.html">org.apache.cayenne</a></div>
<h2 title="Interface DataObject" class="title">Interface DataObject</h2>
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<dt>All Superinterfaces:</dt>
<dd><code><a href="Persistent.html" title="interface in org.apache.cayenne">Persistent</a></code>, <code><a href="https://docs.oracle.com/javase/8/docs/api/java/io/Serializable.html?is-external=true" title="class or interface in java.io" class="externalLink">Serializable</a></code></dd>
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<dt>All Known Implementing Classes:</dt>
<dd><code><a href="BaseDataObject.html" title="class in org.apache.cayenne">BaseDataObject</a></code>, <code><a href="CayenneDataObject.html" title="class in org.apache.cayenne">CayenneDataObject</a></code>, <code><a href="HybridDataObject.html" title="class in org.apache.cayenne">HybridDataObject</a></code></dd>
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<pre>public interface <span class="typeNameLabel">DataObject</span>
extends <a href="Persistent.html" title="interface in org.apache.cayenne">Persistent</a></pre>
<div class="block">Defines basic methods for a persistent object in Cayenne.</div>
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<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Field</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#DEFAULT_VERSION">DEFAULT_VERSION</a></span></code></th>
<td class="colLast">&nbsp;</td>
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<h3>Method Summary</h3>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">Abstract Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colSecond" scope="col">Method</th>
<th class="colLast" scope="col">Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#addToManyTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)">addToManyTarget</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;target,
boolean&nbsp;setReverse)</code></th>
<td class="colLast">
<div class="block">Adds an object to a to-many relationship.</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>long</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSnapshotVersion()">getSnapshotVersion</a></span>()</code></th>
<td class="colLast">
<div class="block">Returns a version of a DataRow snapshot that was used to create this object.</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readNestedProperty(java.lang.String)">readNestedProperty</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;path)</code></th>
<td class="colLast">
<div class="block">Returns a value of the property identified by a property path.</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readProperty(java.lang.String)">readProperty</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propName)</code></th>
<td class="colLast">
<div class="block">Returns a value of the property identified by propName.</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a></code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#readPropertyDirectly(java.lang.String)">readPropertyDirectly</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName)</code></th>
<td class="colLast">
<div class="block">Returns mapped property value as curently stored in the DataObject.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#removeToManyTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)">removeToManyTarget</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;target,
boolean&nbsp;unsetReverse)</code></th>
<td class="colLast">
<div class="block">Removes an object from a to-many relationship.</div>
</td>
</tr>
<tr id="i6" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setSnapshotVersion(long)">setSnapshotVersion</a></span>&#8203;(long&nbsp;snapshotVersion)</code></th>
<td class="colLast">&nbsp;</td>
</tr>
<tr id="i7" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#setToOneTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)">setToOneTarget</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;value,
boolean&nbsp;setReverse)</code></th>
<td class="colLast">
<div class="block">Sets to-one relationship to a new value.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#writeProperty(java.lang.String,java.lang.Object)">writeProperty</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;value)</code></th>
<td class="colLast">
<div class="block">Sets the property to the new value.</div>
</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>void</code></td>
<th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#writePropertyDirectly(java.lang.String,java.lang.Object)">writePropertyDirectly</a></span>&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;val)</code></th>
<td class="colLast">
<div class="block">Modifies a value of a named property without altering the object state in any way,
and without triggering any database operations.</div>
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<h3>Methods inherited from interface&nbsp;org.apache.cayenne.<a href="Persistent.html" title="interface in org.apache.cayenne">Persistent</a></h3>
<code><a href="Persistent.html#getObjectContext()">getObjectContext</a>, <a href="Persistent.html#getObjectId()">getObjectId</a>, <a href="Persistent.html#getPersistenceState()">getPersistenceState</a>, <a href="Persistent.html#setObjectContext(org.apache.cayenne.ObjectContext)">setObjectContext</a>, <a href="Persistent.html#setObjectId(org.apache.cayenne.ObjectId)">setObjectId</a>, <a href="Persistent.html#setPersistenceState(int)">setPersistenceState</a></code></li>
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<h3>Field Detail</h3>
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<h4>DEFAULT_VERSION</h4>
<pre>static final&nbsp;long DEFAULT_VERSION</pre>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="../../../constant-values.html#org.apache.cayenne.DataObject.DEFAULT_VERSION">Constant Field Values</a></dd>
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<h4>writePropertyDirectly</h4>
<pre class="methodSignature">void&nbsp;writePropertyDirectly&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;val)</pre>
<div class="block">Modifies a value of a named property without altering the object state in any way,
and without triggering any database operations. This method is intended mostly for
internal use by Cayenne framework, and shouldn't be called from the application
code.</div>
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<a id="readPropertyDirectly(java.lang.String)">
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<h4>readPropertyDirectly</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;readPropertyDirectly&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName)</pre>
<div class="block">Returns mapped property value as curently stored in the DataObject. Returned value
maybe a fault or a real value. This method will not attempt to resolve faults, or
to read unmapped properties.</div>
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<a id="readNestedProperty(java.lang.String)">
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<h4>readNestedProperty</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;readNestedProperty&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;path)</pre>
<div class="block">Returns a value of the property identified by a property path. Supports reading
both mapped and unmapped properties. Unmapped properties are accessed in a manner
consistent with JavaBeans specification.
<p>
Property path (or nested property) is a dot-separated path used to traverse object
relationships until the final object is found. If a null object found while
traversing path, null is returned. If a list is encountered in the middle of the
path, CayenneRuntimeException is thrown. Unlike
<a href="#readPropertyDirectly(java.lang.String)"><code>readPropertyDirectly(String)</code></a>, this method will resolve an object if it is
HOLLOW.
<p>
Examples:
</p>
<ul>
<li>Read this object property:<br>
<code>String name = (String)artist.readNestedProperty("name");</code><br>
<br>
</li>
<li>Read an object related to this object:<br>
<code>Gallery g = (Gallery)paintingInfo.readNestedProperty("toPainting.toGallery");</code>
<br>
<br>
</li>
<li>Read a property of an object related to this object: <br>
<code>String name = (String)painting.readNestedProperty("toArtist.artistName");</code>
<br>
<br>
</li>
<li>Read to-many relationship list:<br>
<code>List exhibits = (List)painting.readNestedProperty("toGallery.exhibitArray");</code>
<br>
<br>
</li>
<li>Read to-many relationship in the middle of the path:<br>
<code>List&lt;String&gt; names = (List&lt;String&gt;)artist.readNestedProperty("paintingArray.paintingName");</code>
<br>
<br>
</li>
</ul></div>
<dl>
<dt><span class="simpleTagLabel">Since:</span></dt>
<dd>1.0.5</dd>
</dl>
</li>
</ul>
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<h4>readProperty</h4>
<pre class="methodSignature"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;readProperty&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propName)</pre>
<div class="block">Returns a value of the property identified by propName. Resolves faults if needed.
This method can safely be used instead of or in addition to the auto-generated
property accessors in subclasses of CayenneDataObject.</div>
</li>
</ul>
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<h4>writeProperty</h4>
<pre class="methodSignature">void&nbsp;writeProperty&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;propertyName,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>&nbsp;value)</pre>
<div class="block">Sets the property to the new value. Resolves faults if needed. This method can be
safely used instead of or in addition to the auto-generated property modifiers to
set simple properties. Note that to set to-one relationships use
<a href="#setToOneTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)"><code>setToOneTarget(String, DataObject, boolean)</code></a>.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>propertyName</code> - a name of the bean property being modified.</dd>
<dd><code>value</code> - a new value of the property.</dd>
</dl>
</li>
</ul>
<a id="addToManyTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)">
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<h4>addToManyTarget</h4>
<pre class="methodSignature">void&nbsp;addToManyTarget&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;target,
boolean&nbsp;setReverse)</pre>
<div class="block">Adds an object to a to-many relationship.</div>
</li>
</ul>
<a id="removeToManyTarget(java.lang.String,org.apache.cayenne.DataObject,boolean)">
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<h4>removeToManyTarget</h4>
<pre class="methodSignature">void&nbsp;removeToManyTarget&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;target,
boolean&nbsp;unsetReverse)</pre>
<div class="block">Removes an object from a to-many relationship.</div>
</li>
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<h4>setToOneTarget</h4>
<pre class="methodSignature">void&nbsp;setToOneTarget&#8203;(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;relationshipName,
<a href="DataObject.html" title="interface in org.apache.cayenne">DataObject</a>&nbsp;value,
boolean&nbsp;setReverse)</pre>
<div class="block">Sets to-one relationship to a new value. Resolves faults if needed. This method can
safely be used instead of or in addition to the auto-generated property modifiers
to set properties that are to-one relationships.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>relationshipName</code> - a name of the bean property being modified - same as the
name of ObjRelationship.</dd>
<dd><code>value</code> - a new value of the property.</dd>
<dd><code>setReverse</code> - whether to update the reverse relationship pointing from the old
and new values of the property to this object.</dd>
</dl>
</li>
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<a id="getSnapshotVersion()">
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<h4>getSnapshotVersion</h4>
<pre class="methodSignature">long&nbsp;getSnapshotVersion()</pre>
<div class="block">Returns a version of a DataRow snapshot that was used to create this object.</div>
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<h4>setSnapshotVersion</h4>
<pre class="methodSignature">void&nbsp;setSnapshotVersion&#8203;(long&nbsp;snapshotVersion)</pre>
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<dd>1.1</dd>
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