constantpool.html

一个用于对.class文件进行插桩的开源工具

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<A NAME="accept(org.apache.bcel.classfile.Visitor)"><!-- --></A><H3>
accept</H3>
<PRE>
public void <B>accept</B>(<A HREF="../../../../org/apache/bcel/classfile/Visitor.html">Visitor</A>&nbsp;v)</PRE>
<DL>
<DD>Called by objects that are traversing the nodes of the tree implicitely
 defined by the contents of a Java class. I.e., the hierarchy of methods,
 fields, attributes, etc. spawns a tree of objects.<DD><DL>
<DT><B>Specified by: </B><DD><CODE><A HREF="../../../../org/apache/bcel/classfile/Node.html#accept(org.apache.bcel.classfile.Visitor)">accept</A></CODE> in interface <CODE><A HREF="../../../../org/apache/bcel/classfile/Node.html">Node</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>v</CODE> - Visitor object</DL>
</DD>
</DL>
<HR>

<A NAME="constantToString(org.apache.bcel.classfile.Constant)"><!-- --></A><H3>
constantToString</H3>
<PRE>
public java.lang.String <B>constantToString</B>(<A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A>&nbsp;c)
                                  throws java.lang.ClassFormatError</PRE>
<DL>
<DD>Resolve constant to a string representation.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>constant</CODE> - Constant to be printed<DT><B>Returns:</B><DD>String representation</DL>
</DD>
</DL>
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<A NAME="constantToString(int, byte)"><!-- --></A><H3>
constantToString</H3>
<PRE>
public java.lang.String <B>constantToString</B>(int&nbsp;index,
                                         byte&nbsp;tag)
                                  throws java.lang.ClassFormatError</PRE>
<DL>
<DD>Retrieve constant at `index' from constant pool and resolve it to
 a string representation.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - of constant in constant pool<DD><CODE>tag</CODE> - expected type<DT><B>Returns:</B><DD>String representation</DL>
</DD>
</DL>
<HR>

<A NAME="dump(java.io.DataOutputStream)"><!-- --></A><H3>
dump</H3>
<PRE>
public void <B>dump</B>(java.io.DataOutputStream&nbsp;file)
          throws java.io.IOException</PRE>
<DL>
<DD>Dump constant pool to file stream in binary format.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>file</CODE> - Output file stream</DL>
</DD>
</DL>
<HR>

<A NAME="getConstant(int)"><!-- --></A><H3>
getConstant</H3>
<PRE>
public <A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A> <B>getConstant</B>(int&nbsp;index)</PRE>
<DL>
<DD>Get constant from constant pool.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - Index in constant pool<DT><B>Returns:</B><DD>Constant value<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/bcel/classfile/Constant.html"><CODE>Constant</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getConstant(int, byte)"><!-- --></A><H3>
getConstant</H3>
<PRE>
public <A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A> <B>getConstant</B>(int&nbsp;index,
                            byte&nbsp;tag)
                     throws java.lang.ClassFormatError</PRE>
<DL>
<DD>Get constant from constant pool and check whether it has the
 expected type.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - Index in constant pool<DD><CODE>tag</CODE> - Tag of expected constant, i.e., its type<DT><B>Returns:</B><DD>Constant value<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/bcel/classfile/Constant.html"><CODE>Constant</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getConstantPool()"><!-- --></A><H3>
getConstantPool</H3>
<PRE>
public <A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A>[] <B>getConstantPool</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>Array of constants.<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/bcel/classfile/Constant.html"><CODE>Constant</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getConstantString(int, byte)"><!-- --></A><H3>
getConstantString</H3>
<PRE>
public java.lang.String <B>getConstantString</B>(int&nbsp;index,
                                          byte&nbsp;tag)
                                   throws java.lang.ClassFormatError</PRE>
<DL>
<DD>Get string from constant pool and bypass the indirection of 
 `ConstantClass' and `ConstantString' objects. I.e. these classes have
 an index field that points to another entry of the constant pool of
 type `ConstantUtf8' which contains the real data.<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>index</CODE> - Index in constant pool<DD><CODE>tag</CODE> - Tag of expected constant, either ConstantClass or ConstantString<DT><B>Returns:</B><DD>Contents of string reference<DT><B>See Also: </B><DD><A HREF="../../../../org/apache/bcel/classfile/ConstantClass.html"><CODE>ConstantClass</CODE></A>, 
<A HREF="../../../../org/apache/bcel/classfile/ConstantString.html"><CODE>ConstantString</CODE></A></DL>
</DD>
</DL>
<HR>

<A NAME="getLength()"><!-- --></A><H3>
getLength</H3>
<PRE>
public int <B>getLength</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>Length of constant pool.</DL>
</DD>
</DL>
<HR>

<A NAME="setConstant(int, org.apache.bcel.classfile.Constant)"><!-- --></A><H3>
setConstant</H3>
<PRE>
public void <B>setConstant</B>(int&nbsp;index,
                        <A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A>&nbsp;constant)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>constant</CODE> - Constant to set</DL>
</DD>
</DL>
<HR>

<A NAME="setConstantPool(org.apache.bcel.classfile.Constant[])"><!-- --></A><H3>
setConstantPool</H3>
<PRE>
public void <B>setConstantPool</B>(<A HREF="../../../../org/apache/bcel/classfile/Constant.html">Constant</A>[]&nbsp;constant_pool)</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>constant_pool</CODE> - &nbsp;</DL>
</DD>
</DL>
<HR>

<A NAME="toString()"><!-- --></A><H3>
toString</H3>
<PRE>
public java.lang.String <B>toString</B>()</PRE>
<DL>
<DD><DL>
<DT><B>Overrides:</B><DD><CODE>toString</CODE> in class <CODE>java.lang.Object</CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>String representation.</DL>
</DD>
</DL>
<HR>

<A NAME="copy()"><!-- --></A><H3>
copy</H3>
<PRE>
public <A HREF="../../../../org/apache/bcel/classfile/ConstantPool.html">ConstantPool</A> <B>copy</B>()</PRE>
<DL>
<DD><DL>
</DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>deep copy of this constant pool</DL>
</DD>
</DL>
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