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<div class="subTitle">serp.bytecode</div>
<h2 title="Class StackInstruction" class="title">Class StackInstruction</h2>
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<ul class="inheritance">
<li><a href="http://docs.oracle.com/javase/6/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="../../serp/bytecode/Instruction.html" title="class in serp.bytecode">serp.bytecode.Instruction</a></li>
<li>
<ul class="inheritance">
<li><a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">serp.bytecode.TypedInstruction</a></li>
<li>
<ul class="inheritance">
<li>serp.bytecode.StackInstruction</li>
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<dt>All Implemented Interfaces:</dt>
<dd><a href="../../serp/bytecode/BCEntity.html" title="interface in serp.bytecode">BCEntity</a>, <a href="../../serp/bytecode/visitor/VisitAcceptor.html" title="interface in serp.bytecode.visitor">VisitAcceptor</a></dd>
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<pre>public class <a href="../../src-html/serp/bytecode/StackInstruction.html#line.16">StackInstruction</a>
extends <a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a></pre>
<div class="block">Represents an instruction that manipulates the stack of the current
frame. Using the <a href="../../serp/bytecode/StackInstruction.html#setType(java.lang.String)"><code>setType(java.lang.String)</code></a> methods is a hint about the type being
manipulated that might cause this instruction to use the wide version
of the opcode it represents (if manipulating a long or double). This
saves the developer from having to decide at compile time whether to
use <code>pop</code> or <code>pop2</code>, etc.</div>
<dl><dt><span class="strong">Author:</span></dt>
<dd>Abe White</dd></dl>
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<h3>Method Summary</h3>
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<caption><span>Methods</span><span class="tabEnd"> </span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#acceptVisit(serp.bytecode.visitor.BCVisitor)">acceptVisit</a></strong>(<a href="../../serp/bytecode/visitor/BCVisitor.html" title="class in serp.bytecode.visitor">BCVisitor</a> visit)</code>
<div class="block">Accept a visit from a <a href="../../serp/bytecode/visitor/BCVisitor.html" title="class in serp.bytecode.visitor"><code>BCVisitor</code></a>, calling the appropriate methods
to notify the visitor that it has entered this entity, and
to provide it with the proper callbacks for each sub-entity owned
by this one.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#getStackChange()">getStackChange</a></strong>()</code>
<div class="block">Return the number of stack positions this instruction pushes
or pops during its execution.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#getTypeName()">getTypeName</a></strong>()</code>
<div class="block">This method will always return null; use <a href="../../serp/bytecode/StackInstruction.html#isWide()"><code>isWide()</code></a> to determine
if this is pop2, dup2, etc.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>boolean</code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#isWide()">isWide</a></strong>()</code>
<div class="block">Return whether to use the wide form of the current opcode for
operations on longs or doubles.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a></code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#setType(java.lang.String)">setType</a></strong>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> type)</code>
<div class="block">Set the type of this instruction.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../serp/bytecode/StackInstruction.html" title="class in serp.bytecode">StackInstruction</a></code></td>
<td class="colLast"><code><strong><a href="../../serp/bytecode/StackInstruction.html#setWide(boolean)">setWide</a></strong>(boolean wide)</code>
<div class="block">Set whether to use the wide form of the current opcode for operations
on longs or doubles.</div>
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<h3>Methods inherited from class serp.bytecode.<a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a></h3>
<code><a href="../../serp/bytecode/TypedInstruction.html#getType()">getType</a>, <a href="../../serp/bytecode/TypedInstruction.html#getTypeBC()">getTypeBC</a>, <a href="../../serp/bytecode/TypedInstruction.html#setType(serp.bytecode.BCClass)">setType</a>, <a href="../../serp/bytecode/TypedInstruction.html#setType(java.lang.Class)">setType</a></code></li>
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<h3>Methods inherited from class serp.bytecode.<a href="../../serp/bytecode/Instruction.html" title="class in serp.bytecode">Instruction</a></h3>
<code><a href="../../serp/bytecode/Instruction.html#equalsInstruction(serp.bytecode.Instruction)">equalsInstruction</a>, <a href="../../serp/bytecode/Instruction.html#getByteIndex()">getByteIndex</a>, <a href="../../serp/bytecode/Instruction.html#getClassLoader()">getClassLoader</a>, <a href="../../serp/bytecode/Instruction.html#getCode()">getCode</a>, <a href="../../serp/bytecode/Instruction.html#getLineNumber()">getLineNumber</a>, <a href="../../serp/bytecode/Instruction.html#getLogicalStackChange()">getLogicalStackChange</a>, <a href="../../serp/bytecode/Instruction.html#getName()">getName</a>, <a href="../../serp/bytecode/Instruction.html#getOpcode()">getOpcode</a>, <a href="../../serp/bytecode/Instruction.html#getPool()">getPool</a>, <a href="../../serp/bytecode/Instruction.html#getProject()">getProject</a>, <a href="../../serp/bytecode/Instruction.html#isValid()">isValid</a></code></li>
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<h3>Methods inherited from class java.lang.<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3>
<code><a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</a>, <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/Object.html?is-external=true#wait(long,%20int)" title="class or interface in java.lang">wait</a></code></li>
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<h3>Method Detail</h3>
<a name="getStackChange()">
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<h4>getStackChange</h4>
<pre>public int <a href="../../src-html/serp/bytecode/StackInstruction.html#line.21">getStackChange</a>()</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../serp/bytecode/Instruction.html#getStackChange()">Instruction</a></code></strong></div>
<div class="block">Return the number of stack positions this instruction pushes
or pops during its execution.</div>
<dl>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../serp/bytecode/Instruction.html#getStackChange()">getStackChange</a></code> in class <code><a href="../../serp/bytecode/Instruction.html" title="class in serp.bytecode">Instruction</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>0 if the stack is not affected by this instruction, a
positive number if it pushes onto the stack, and a negative
number if it pops from the stack</dd></dl>
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<a name="getTypeName()">
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<h4>getTypeName</h4>
<pre>public <a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> <a href="../../src-html/serp/bytecode/StackInstruction.html#line.44">getTypeName</a>()</pre>
<div class="block">This method will always return null; use <a href="../../serp/bytecode/StackInstruction.html#isWide()"><code>isWide()</code></a> to determine
if this is pop2, dup2, etc.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../serp/bytecode/TypedInstruction.html#getTypeName()">getTypeName</a></code> in class <code><a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a></code></dd>
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<h4>setType</h4>
<pre>public <a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a> <a href="../../src-html/serp/bytecode/StackInstruction.html#line.48">setType</a>(<a href="http://docs.oracle.com/javase/6/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> type)</pre>
<div class="block"><strong>Description copied from class: <code><a href="../../serp/bytecode/TypedInstruction.html#setType(java.lang.String)">TypedInstruction</a></code></strong></div>
<div class="block">Set the type of this instruction. Types that have no direct
support will be converted accordingly.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../serp/bytecode/TypedInstruction.html#setType(java.lang.String)">setType</a></code> in class <code><a href="../../serp/bytecode/TypedInstruction.html" title="class in serp.bytecode">TypedInstruction</a></code></dd>
<dt><span class="strong">Returns:</span></dt><dd>this instruction, for method chaining</dd></dl>
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<h4>isWide</h4>
<pre>public boolean <a href="../../src-html/serp/bytecode/StackInstruction.html#line.58">isWide</a>()</pre>
<div class="block">Return whether to use the wide form of the current opcode for
operations on longs or doubles.</div>
</li>
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<a name="setWide(boolean)">
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<h4>setWide</h4>
<pre>public <a href="../../serp/bytecode/StackInstruction.html" title="class in serp.bytecode">StackInstruction</a> <a href="../../src-html/serp/bytecode/StackInstruction.html#line.76">setWide</a>(boolean wide)</pre>
<div class="block">Set whether to use the wide form of the current opcode for operations
on longs or doubles.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>this instruction, for method chaining</dd></dl>
</li>
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<a name="acceptVisit(serp.bytecode.visitor.BCVisitor)">
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<h4>acceptVisit</h4>
<pre>public void <a href="../../src-html/serp/bytecode/StackInstruction.html#line.114">acceptVisit</a>(<a href="../../serp/bytecode/visitor/BCVisitor.html" title="class in serp.bytecode.visitor">BCVisitor</a> visit)</pre>
<div class="block"><strong>Description copied from interface: <code><a href="../../serp/bytecode/visitor/VisitAcceptor.html#acceptVisit(serp.bytecode.visitor.BCVisitor)">VisitAcceptor</a></code></strong></div>
<div class="block">Accept a visit from a <a href="../../serp/bytecode/visitor/BCVisitor.html" title="class in serp.bytecode.visitor"><code>BCVisitor</code></a>, calling the appropriate methods
to notify the visitor that it has entered this entity, and
to provide it with the proper callbacks for each sub-entity owned
by this one.</div>
<dl>
<dt><strong>Specified by:</strong></dt>
<dd><code><a href="../../serp/bytecode/visitor/VisitAcceptor.html#acceptVisit(serp.bytecode.visitor.BCVisitor)">acceptVisit</a></code> in interface <code><a href="../../serp/bytecode/visitor/VisitAcceptor.html" title="interface in serp.bytecode.visitor">VisitAcceptor</a></code></dd>
<dt><strong>Overrides:</strong></dt>
<dd><code><a href="../../serp/bytecode/Instruction.html#acceptVisit(serp.bytecode.visitor.BCVisitor)">acceptVisit</a></code> in class <code><a href="../../serp/bytecode/Instruction.html" title="class in serp.bytecode">Instruction</a></code></dd>
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