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<div class="subTitle">org.objectweb.asm.tree.analysis</div>
<h2 title="Interface Interpreter" class="title">Interface Interpreter</h2>
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<dl>
<dt>All Known Implementing Classes:</dt>
<dd><a href="../../../../../org/objectweb/asm/tree/analysis/BasicInterpreter.html" title="class in org.objectweb.asm.tree.analysis">BasicInterpreter</a>, <a href="../../../../../org/objectweb/asm/tree/analysis/BasicVerifier.html" title="class in org.objectweb.asm.tree.analysis">BasicVerifier</a>, <a href="../../../../../org/objectweb/asm/tree/analysis/DataflowInterpreter.html" title="class in org.objectweb.asm.tree.analysis">DataflowInterpreter</a>, <a href="../../../../../org/objectweb/asm/tree/analysis/SimpleVerifier.html" title="class in org.objectweb.asm.tree.analysis">SimpleVerifier</a></dd>
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<pre>public interface <span class="strong">Interpreter</span></pre>
<div class="block">A semantic bytecode interpreter. More precisely, this interpreter only
manages the computation of values from other values: it does not manage the
transfer of values to or from the stack, and to or from the local variables.
This separation allows a generic bytecode <a href="../../../../../org/objectweb/asm/tree/analysis/Analyzer.html" title="class in org.objectweb.asm.tree.analysis"><code>Analyzer</code></a> to work with
various semantic interpreters, without needing to duplicate the code to
simulate the transfer of values.</div>
<dl><dt><span class="strong">Author:</span></dt>
<dd>Eric Bruneton</dd></dl>
</li>
</ul>
</div>
<div class="summary">
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<h3>Method Summary</h3>
<table class="overviewSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<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><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#binaryOperation(org.objectweb.asm.tree.AbstractInsnNode, org.objectweb.asm.tree.analysis.Value, org.objectweb.asm.tree.analysis.Value)">binaryOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value1,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value2)</code>
<div class="block">Interprets a bytecode instruction with two arguments.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#copyOperation(org.objectweb.asm.tree.AbstractInsnNode, org.objectweb.asm.tree.analysis.Value)">copyOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value)</code>
<div class="block">Interprets a bytecode instruction that moves a value on the stack or to
or from local variables.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#merge(org.objectweb.asm.tree.analysis.Value, org.objectweb.asm.tree.analysis.Value)">merge</a></strong>(<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> v,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> w)</code>
<div class="block">Merges two values.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#naryOperation(org.objectweb.asm.tree.AbstractInsnNode, java.util.List)">naryOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="http://java.sun.com/j2se/1.4.2/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a> values)</code>
<div class="block">Interprets a bytecode instruction with a variable number of arguments.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#newOperation(org.objectweb.asm.tree.AbstractInsnNode)">newOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn)</code>
<div class="block">Interprets a bytecode instruction without arguments.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#newValue(org.objectweb.asm.Type)">newValue</a></strong>(<a href="../../../../../org/objectweb/asm/Type.html" title="class in org.objectweb.asm">Type</a> type)</code>
<div class="block">Creates a new value that represents the given type.</div>
</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#ternaryOperation(org.objectweb.asm.tree.AbstractInsnNode, org.objectweb.asm.tree.analysis.Value, org.objectweb.asm.tree.analysis.Value, org.objectweb.asm.tree.analysis.Value)">ternaryOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value1,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value2,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value3)</code>
<div class="block">Interprets a bytecode instruction with three arguments.</div>
</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a></code></td>
<td class="colLast"><code><strong><a href="../../../../../org/objectweb/asm/tree/analysis/Interpreter.html#unaryOperation(org.objectweb.asm.tree.AbstractInsnNode, org.objectweb.asm.tree.analysis.Value)">unaryOperation</a></strong>(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value)</code>
<div class="block">Interprets a bytecode instruction with a single argument.</div>
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<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> newValue(<a href="../../../../../org/objectweb/asm/Type.html" title="class in org.objectweb.asm">Type</a> type)</pre>
<div class="block">Creates a new value that represents the given type.
Called for method parameters (including <code>this</code>),
exception handler variable and with <code>null</code> type
for variables reserved by long and double types.</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>type</code> - a primitive or reference type, or <tt>null</tt> to
represent an uninitialized value.</dd>
<dt><span class="strong">Returns:</span></dt><dd>a value that represents the given type. The size of the returned
value must be equal to the size of the given type.</dd></dl>
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<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> newOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction without arguments. This method is
called for the following opcodes:
ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4,
ICONST_5, LCONST_0, LCONST_1, FCONST_0, FCONST_1, FCONST_2, DCONST_0,
DCONST_1, BIPUSH, SIPUSH, LDC, JSR, GETSTATIC, NEW</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
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<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> copyOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction that moves a value on the stack or to
or from local variables. This method is called for the following opcodes:
ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE,
ASTORE, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd><dd><code>value</code> - the value that must be moved by the instruction.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction. The
returned value must be <tt>equal</tt> to the given value.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
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<h4>unaryOperation</h4>
<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> unaryOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction with a single argument. This method is
called for the following opcodes:
INEG, LNEG, FNEG, DNEG, IINC, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L,
F2D, D2I, D2L, D2F, I2B, I2C, I2S, IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE,
TABLESWITCH, LOOKUPSWITCH, IRETURN, LRETURN, FRETURN, DRETURN, ARETURN,
PUTSTATIC, GETFIELD, NEWARRAY, ANEWARRAY, ARRAYLENGTH, ATHROW, CHECKCAST,
INSTANCEOF, MONITORENTER, MONITOREXIT, IFNULL, IFNONNULL</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd><dd><code>value</code> - the argument of the instruction to be interpreted.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
</li>
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<h4>binaryOperation</h4>
<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> binaryOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value1,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value2)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction with two arguments. This method is
called for the following opcodes:
IALOAD, LALOAD, FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IADD,
LADD, FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV,
LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, ISHL, LSHL, ISHR, LSHR, IUSHR,
LUSHR, IAND, LAND, IOR, LOR, IXOR, LXOR, LCMP, FCMPL, FCMPG, DCMPL,
DCMPG, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE,
IF_ACMPEQ, IF_ACMPNE, PUTFIELD</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd><dd><code>value1</code> - the first argument of the instruction to be interpreted.</dd><dd><code>value2</code> - the second argument of the instruction to be interpreted.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
</li>
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<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> ternaryOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value1,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value2,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> value3)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction with three arguments. This method is
called for the following opcodes:
IASTORE, LASTORE, FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd><dd><code>value1</code> - the first argument of the instruction to be interpreted.</dd><dd><code>value2</code> - the second argument of the instruction to be interpreted.</dd><dd><code>value3</code> - the third argument of the instruction to be interpreted.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
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<h4>naryOperation</h4>
<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> naryOperation(<a href="../../../../../org/objectweb/asm/tree/AbstractInsnNode.html" title="class in org.objectweb.asm.tree">AbstractInsnNode</a> insn,
<a href="http://java.sun.com/j2se/1.4.2/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a> values)
throws <a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></pre>
<div class="block">Interprets a bytecode instruction with a variable number of arguments.
This method is called for the following opcodes:
INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC, INVOKEINTERFACE,
MULTIANEWARRAY</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>insn</code> - the bytecode instruction to be interpreted.</dd><dd><code>values</code> - the arguments of the instruction to be interpreted.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the result of the interpretation of the given instruction.</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code><a href="../../../../../org/objectweb/asm/tree/analysis/AnalyzerException.html" title="class in org.objectweb.asm.tree.analysis">AnalyzerException</a></code> - if an error occured during the interpretation.</dd></dl>
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<h4>merge</h4>
<pre><a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> merge(<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> v,
<a href="../../../../../org/objectweb/asm/tree/analysis/Value.html" title="interface in org.objectweb.asm.tree.analysis">Value</a> w)</pre>
<div class="block">Merges two values. The merge operation must return a value that
represents both values (for instance, if the two values are two types,
the merged value must be a common super type of the two types. If the two
values are integer intervals, the merged value must be an interval that
contains the previous ones. Likewise for other types of values).</div>
<dl><dt><span class="strong">Parameters:</span></dt><dd><code>v</code> - a value.</dd><dd><code>w</code> - another value.</dd>
<dt><span class="strong">Returns:</span></dt><dd>the merged value. If the merged value is equal to <tt>v</tt>,
this method <i>must</i> return <tt>v</tt>.</dd></dl>
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