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 <h2 title="Class GCArrayletObjectModelBase" class="title">Class GCArrayletObjectModelBase</h2>
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 <li><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink" target="_blank">java.lang.Object</a></li>
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 <li><a href="GCBase.html" title="class in com.ibm.j9ddr.vm29.j9.gc">com.ibm.j9ddr.vm29.j9.gc.GCBase</a></li>
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 <li>com.ibm.j9ddr.vm29.j9.gc.GCArrayletObjectModelBase</li>
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 <pre>public abstract class <span class="typeNameLabel">GCArrayletObjectModelBase</span>
 extends <a href="GCBase.html" title="class in com.ibm.j9ddr.vm29.j9.gc">GCBase</a></pre>
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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>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletLeafLogSize">arrayletLeafLogSize</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletLeafSize">arrayletLeafSize</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletLeafSizeMask">arrayletLeafSizeMask</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected com.ibm.j9ddr.vm29.pointer.generated.GC_ArrayletObjectModelPointer</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletObjectModel">arrayletObjectModel</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../pointer/VoidPointer.html" title="class in com.ibm.j9ddr.vm29.pointer">VoidPointer</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletRangeBase">arrayletRangeBase</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="rowColor">
 <td class="colFirst"><code>protected <a href="../../pointer/VoidPointer.html" title="class in com.ibm.j9ddr.vm29.pointer">VoidPointer</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#arrayletRangeTop">arrayletRangeTop</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
 <tr class="altColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#largestDesirableArraySpineSize">largestDesirableArraySpineSize</a></span></code></th>
 <td class="colLast">&nbsp;</td>
 </tr>
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 <th class="colFirst" scope="col">Constructor</th>
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 <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">GCArrayletObjectModelBase</a></span>()</code></th>
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 <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></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><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete 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>
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 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#externalArrayletsSize(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">externalArrayletsSize</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Get the total number of bytes consumed by arraylets external to the
  given indexable object.</div>
 </td>
 </tr>
 <tr id="i1" class="rowColor">
 <td class="colFirst"><code>static com.ibm.j9ddr.vm29.j9.gc.GCArrayObjectModel</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#from()">from</a></span>()</code></th>
 <td class="colLast">
 <div class="block">Factory method to construct an appropriate array object model.</div>
 </td>
 </tr>
 <tr id="i2" class="altColor">
 <td class="colFirst"><code>protected long</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getArrayLayout(com.ibm.j9ddr.vm29.pointer.generated.J9ArrayClassPointer,com.ibm.j9ddr.vm29.types.UDATA)">getArrayLayout</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ArrayClassPointer&nbsp;clazz,
               <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;dataSizeInBytes)</code></th>
 <td class="colLast">
 <div class="block">Get the layout of an indexable object given it's class, data size in bytes and the subspace's largestDesirableSpine.</div>
 </td>
 </tr>
 <tr id="i3" class="rowColor">
 <td class="colFirst"><code>protected long</code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getArrayLayout(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getArrayLayout</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Get the layout for the given indexable object</div>
 </td>
 </tr>
 <tr id="i4" class="altColor">
 <td class="colFirst"><code><a href="../../pointer/ObjectReferencePointer.html" title="class in com.ibm.j9ddr.vm29.pointer">ObjectReferencePointer</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getArrayoidPointer(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getArrayoidPointer</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the address of first arraylet leaf slot in the spine</div>
 </td>
 </tr>
 <tr id="i5" class="rowColor">
 <td class="colFirst"><code><a href="../../pointer/VoidPointer.html" title="class in com.ibm.j9ddr.vm29.pointer">VoidPointer</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDataPointerForContiguous(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getDataPointerForContiguous</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the address of first data slot in the array</div>
 </td>
 </tr>
 <tr id="i6" class="altColor">
 <td class="colFirst"><code><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getDataSizeInBytes(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getDataSizeInBytes</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the size of data in an indexable object, in bytes, including leaves, excluding the header.</div>
 </td>
 </tr>
 <tr id="i7" class="rowColor">
 <td class="colFirst"><code><a href="../../pointer/VoidPointer.html" title="class in com.ibm.j9ddr.vm29.pointer">VoidPointer</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getElementAddress(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer,int,int)">getElementAddress</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array,
                  int&nbsp;elementIndex,
                  int&nbsp;elementSize)</code></th>
 <td class="colLast">
 <div class="block">Returns the address of the element at elementIndex logical offset into indexableObjectPointer, assuming that each
  element is dataSize bytes.</div>
 </td>
 </tr>
 <tr id="i8" class="altColor">
 <td class="colFirst"><code><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHashcodeOffset(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getHashcodeOffset</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the offset of the hashcode slot, in bytes, from the beginning of the header.</div>
 </td>
 </tr>
 <tr id="i9" class="rowColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHeaderSize(long)">getHeaderSize</a></span>&#8203;(long&nbsp;layout)</code></th>
 <td class="colLast">
 <div class="block">Get the spine size without header for an arraylet with these properties</div>
 </td>
 </tr>
 <tr id="i10" class="altColor">
 <td class="colFirst"><code><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getHeaderSize(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getHeaderSize</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the header size of a given indexable object.</div>
 </td>
 </tr>
 <tr id="i11" class="rowColor">
 <td class="colFirst"><code>abstract <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSizeInBytesWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getSizeInBytesWithHeader</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the size of an indexable object, in bytes, including the header.</div>
 </td>
 </tr>
 <tr id="i12" class="altColor">
 <td class="colFirst"><code><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSizeInElements(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getSizeInElements</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the size of an indexable object in elements.</div>
 </td>
 </tr>
 <tr id="i13" class="rowColor">
 <td class="colFirst"><code><a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSizeInSlotsWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getSizeInSlotsWithHeader</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Returns the size of an indexable object, in slots, including the header.</div>
 </td>
 </tr>
 <tr id="i14" class="altColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSpineSize(long,com.ibm.j9ddr.vm29.types.UDATA,com.ibm.j9ddr.vm29.types.UDATA,boolean)">getSpineSize</a></span>&#8203;(long&nbsp;layout,
             <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;numberArraylets,
             <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;dataSize,
             boolean&nbsp;alignData)</code></th>
 <td class="colLast">
 <div class="block">Get the spine size for an arraylet with these properties</div>
 </td>
 </tr>
 <tr id="i15" class="rowColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSpineSize(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getSpineSize</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)</code></th>
 <td class="colLast">
 <div class="block">Get the spine size for the given indexable object</div>
 </td>
 </tr>
 <tr id="i16" class="altColor">
 <td class="colFirst"><code>protected <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getSpineSizeWithoutHeader(long,com.ibm.j9ddr.vm29.types.UDATA,com.ibm.j9ddr.vm29.types.UDATA,boolean)">getSpineSizeWithoutHeader</a></span>&#8203;(long&nbsp;layout,
                          <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;numberArraylets,
                          <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;dataSize,
                          boolean&nbsp;alignData)</code></th>
 <td class="colLast">
 <div class="block">Get the spine size without header for an arraylet with these properties</div>
 </td>
 </tr>
 <tr id="i17" class="rowColor">
 <td class="colFirst"><code>abstract <a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a></code></td>
 <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTotalFootprintInBytesWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">getTotalFootprintInBytesWithHeader</a></span>&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;arrayPtr)</code></th>
 <td class="colLast">
 <div class="block">Get the total footprint of an object, in bytes, including the object header and all data.</div>
 </td>
 </tr>
 <tr id="i18" class="altColor">
 <td class="colFirst"><code>boolean</code></td>
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 <div class="block">Get the spine size for an arraylet with these properties</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>J9Class</code> - The class of the array.</dd>
 <dd><code>layout</code> - The layout of the indexable object</dd>
 <dd><code>numberArraylets</code> - Number of arraylets for this indexable object</dd>
 <dd><code>dataSize</code> - How many elements are in the indexable object</dd>
 <dd><code>alignData</code> - Should the data section be aligned</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>spineSize The actual size in byte of the spine</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
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 <div class="block">Returns the size of an indexable object in elements.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
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 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Size of object in elements</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Get the spine size without header for an arraylet with these properties</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>layout</code> - The layout of the indexable object</dd>
 <dd><code>numberArraylets</code> - Number of arraylets for this indexable object</dd>
 <dd><code>dataSize</code> - How many elements are in the indexable object</dd>
 <dd><code>alignData</code> - Should the data section be aligned</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
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 <div class="block">Returns the header size of a given indexable object. The arraylet layout is determined base on "small" size.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Ptr to an array for which header size will be returned</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Size of header in bytes</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
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 <div class="block">Get the spine size without header for an arraylet with these properties</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>layout</code> - The layout of the indexable object</dd>
 <dd><code>numberArraylets</code> - Number of arraylets for this indexable object</dd>
 <dd><code>dataSize</code> - How many elements are in the indexable object</dd>
 <dd><code>alignData</code> - Should the data section be aligned</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>spineSize The actual size in byte of the spine</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Get the spine size for the given indexable object</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>objPtr</code> - Pointer to an array object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>The total size in bytes of objPtr's array spine;
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 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Get the layout for the given indexable object</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>objPtr</code> - Pointer to a array object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the ArrayLayout for objectPtr</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Get the layout of an indexable object given it's class, data size in bytes and the subspace's largestDesirableSpine.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>clazz</code> - The class of the object stored in the array.</dd>
 <dd><code>dataSizeInBytes</code> - the size in bytes of the data of the array.</dd>
 <dd><code>largestDesirableSpine</code> - The largest desirable spine of the arraylet.</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Returns the size of data in an indexable object, in bytes, including leaves, excluding the header.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Pointer to the indexable object whose size is required</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Size of object in bytes excluding the header</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
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 <div class="block">Returns the address of first arraylet leaf slot in the spine</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Ptr to an array</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Arrayoid ptr</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
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 <div class="block">Returns the address of first data slot in the array</div>
 <dl>
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 <dt><span class="returnLabel">Returns:</span></dt>
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 <dt><span class="throwsLabel">Throws:</span></dt>
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 <pre class="methodSignature">public&nbsp;boolean&nbsp;isInlineContiguousArraylet&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)
                                    throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Check the given indexable object is inline contiguous</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>objPtr</code> - Pointer to an array object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>true of array is inline contiguous</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
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 <h4>shouldAlignSpineDataSection</h4>
 <pre class="methodSignature">protected&nbsp;boolean&nbsp;shouldAlignSpineDataSection&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ArrayClassPointer&nbsp;clazz)
                                        throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Determines whether or not a spine that represents an object of this
  class should have its data section aligned.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>clazz</code> - The class to check alignment for</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>needAlignment Should the data section be aligned</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
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 <h4>shouldAlignSpineDataSection</h4>
 <pre class="methodSignature">protected&nbsp;boolean&nbsp;shouldAlignSpineDataSection&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9ClassPointer&nbsp;clazz)
                                        throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Determines whether or not a spine that represents an object of this
  class should have its data section aligned.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>clazz</code> - The class to check alignment for</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>needAlignment Should the data section be aligned</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="getElementAddress(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer,int,int)">
 <!--   -->
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 <ul class="blockList">
 <li class="blockList">
 <h4>getElementAddress</h4>
 <pre class="methodSignature">public&nbsp;<a href="../../pointer/VoidPointer.html" title="class in com.ibm.j9ddr.vm29.pointer">VoidPointer</a>&nbsp;getElementAddress&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array,
                                      int&nbsp;elementIndex,
                                      int&nbsp;elementSize)
                               throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Returns the address of the element at elementIndex logical offset into indexableObjectPointer, assuming that each
  element is dataSize bytes.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - The array from which we should look-up the address</dd>
 <dd><code>elementIndex</code> - The logical index number of the element within the array</dd>
 <dd><code>elementSize</code> - The size, in bytes, of a single element of the array</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>A pointer to the element</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="numArraylets(com.ibm.j9ddr.vm29.types.UDATA)">
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 <ul class="blockList">
 <li class="blockList">
 <h4>numArraylets</h4>
 <pre class="methodSignature">protected&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;numArraylets&#8203;(<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;unadjustedDataSizeInBytes)
                       throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Return the total number of arraylets for an indexable object with a size of dataInSizeByte, including a (possibly empty) leaf in the spine.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>dataSizeInBytes</code> - size of an array in bytes (not elements)</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the number of arraylets used for an array of dataSizeInBytes bytes</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="numExternalArraylets(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">
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 <h4>numExternalArraylets</h4>
 <pre class="methodSignature">protected&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;numExternalArraylets&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)
                               throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Return the total number of arraylets for an indexable object, not including the arraylet in the spine.
  Note that discontiguous arrays always have an empty leaf contained in the spine.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - pointer to array</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the number of leaf arraylets</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="externalArrayletsSize(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>externalArrayletsSize</h4>
 <pre class="methodSignature">protected&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;externalArrayletsSize&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)
                                throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Get the total number of bytes consumed by arraylets external to the
  given indexable object.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Pointer to an array object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the number of bytes consumed external to the spine</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="from()">
 <!--   -->
 </a>
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 <li class="blockList">
 <h4>from</h4>
 <pre class="methodSignature">public static&nbsp;com.ibm.j9ddr.vm29.j9.gc.GCArrayObjectModel&nbsp;from()
                                                         throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Factory method to construct an appropriate array object model.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>structure</code> - the J9JavaVM structure to use</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>an instance of ArrayObjectModel</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="getSizeInBytesWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">
 <!--   -->
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 <ul class="blockList">
 <li class="blockList">
 <h4>getSizeInBytesWithHeader</h4>
 <pre class="methodSignature">public abstract&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;getSizeInBytesWithHeader&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)
                                         throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Returns the size of an indexable object, in bytes, including the header.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Pointer to the indexable object whose size is required</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Size of object in bytes including the header</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="getSizeInSlotsWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">
 <!--   -->
 </a>
 <ul class="blockList">
 <li class="blockList">
 <h4>getSizeInSlotsWithHeader</h4>
 <pre class="methodSignature">public&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;getSizeInSlotsWithHeader&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;array)
                                throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Returns the size of an indexable object, in slots, including the header.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>array</code> - Pointer to the indexable object whose size is required</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>Size of object in slots including the header</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 <a id="getTotalFootprintInBytesWithHeader(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer)">
 <!--   -->
 </a>
 <ul class="blockListLast">
 <li class="blockList">
 <h4>getTotalFootprintInBytesWithHeader</h4>
 <pre class="methodSignature">public abstract&nbsp;<a href="../../types/UDATA.html" title="class in com.ibm.j9ddr.vm29.types">UDATA</a>&nbsp;getTotalFootprintInBytesWithHeader&#8203;(com.ibm.j9ddr.vm29.pointer.generated.J9IndexableObjectPointer&nbsp;arrayPtr)
                                                   throws <a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></pre>
 <div class="block">Get the total footprint of an object, in bytes, including the object header and all data.
  If the object has a discontiguous representation, this method should return the size of
  the root object plus the total of all the discontiguous parts of the object.</div>
 <dl>
 <dt><span class="paramLabel">Parameters:</span></dt>
 <dd><code>arrayPtr</code> - Pointer to an object</dd>
 <dt><span class="returnLabel">Returns:</span></dt>
 <dd>the total size of an object, in bytes, including discontiguous parts</dd>
 <dt><span class="throwsLabel">Throws:</span></dt>
 <dd><code><a href="../../../CorruptDataException.html" title="class in com.ibm.j9ddr">CorruptDataException</a></code></dd>
 </dl>
 </li>
 </ul>
 </li>
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