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PMD自定義規則來檢測StringBuffer的附加操作

2012-01-31 42 views
1

我想檢測是否使用了StringBuffer，以及如果append方法被調用或不。所以，我的方法如下。但我還沒有找到解決辦法。PMD自定義規則來檢測StringBuffer的附加操作

尋求幫助。

XPath的準備：

//PrimaryExpression/PrimaryPrefix/Name[contains(@Image,'append') and contains(@Image, 
//LocalVariableDeclaration[descendant::ClassOrInterfaceType[@Image='StringBuffer']] 
/VariableDeclarator/VariableDeclaratorId/@Image)]

測試輸入

public class pmdTestSomeCollection { 
    StringBuffer sb11 = new StringBuffer("abcdeeee"); 
     public static void main(String args[]) { 
     StringBuffer sb1 = new StringBuffer("abcde"); 
     sb1.append("abcdefghij"); 
     StringBuffer sb2 = sb1.reverse(); 
     sb2.append("A"); 
     System.out.println(sb1); 
     System.out.println(sb2); 
    } 
}

XML生成（抽象語法樹） 

<?xml version="1.0" encoding="UTF-8" standalone="no"?> 
<CompilationUnit BeginColumn="1" BeginLine="1" EndColumn="1" EndLine="10" Image="" Label="" declarationsAreInDefaultPackage="true"> 
    <TypeDeclaration BeginColumn="1" BeginLine="1" EndColumn="1" EndLine="10" Image="" Label=""> 
     <ClassOrInterfaceDeclaration Abstract="false" BeginColumn="8" BeginLine="1" EndColumn="1" EndLine="10" Final="false" Image="pmdTestSomeCollection" Interface="false" Label="" Modifiers="1" Native="false" Nested="false" PackagePrivate="false" Private="false" Protected="false" Public="true" Static="false" Strictfp="false" Synchronized="false" Transient="false" Volatile="false"> 
      <ClassOrInterfaceBody BeginColumn="36" BeginLine="1" EndColumn="1" EndLine="10" Image="" Label=""> 
       <ClassOrInterfaceBodyDeclaration AnonymousInnerClass="false" BeginColumn="1" BeginLine="2" EndColumn="49" EndLine="2" EnumChild="false" Image="" Label=""> 
        <FieldDeclaration Abstract="false" Array="false" ArrayDepth="0" BeginColumn="1" BeginLine="2" EndColumn="49" EndLine="2" Final="false" Image="" InterfaceMember="false" Label="" Modifiers="0" Native="false" PackagePrivate="true" Private="false" Protected="false" Public="false" Static="false" Strictfp="false" Synchronized="false" SyntacticallyFinal="false" SyntacticallyPublic="false" SyntacticallyStatic="false" Transient="false" VariableName="sb11" Volatile="false"> 
         <Type Array="false" ArrayDepth="0" BeginColumn="1" BeginLine="2" EndColumn="12" EndLine="2" Image="" Label="" TypeImage="StringBuffer"> 
          <ReferenceType Array="false" ArrayDepth="0" BeginColumn="1" BeginLine="2" EndColumn="12" EndLine="2" Image="" Label=""> 
           <ClassOrInterfaceType BeginColumn="1" BeginLine="2" EndColumn="12" EndLine="2" Image="StringBuffer" Label=""/> 
          </ReferenceType> 
         </Type> 
         <VariableDeclarator BeginColumn="14" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
          <VariableDeclaratorId Array="false" ArrayDepth="0" BeginColumn="14" BeginLine="2" EndColumn="17" EndLine="2" ExceptionBlockParameter="false" Image="sb11" Label=""/> 
          <VariableInitializer BeginColumn="21" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
           <Expression BeginColumn="21" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
            <PrimaryExpression BeginColumn="21" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
             <PrimaryPrefix BeginColumn="21" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
              <AllocationExpression BeginColumn="21" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
               <ClassOrInterfaceType BeginColumn="25" BeginLine="2" EndColumn="36" EndLine="2" Image="StringBuffer" Label=""/> 
               <Arguments ArgumentCount="1" BeginColumn="37" BeginLine="2" EndColumn="48" EndLine="2" Image="" Label=""> 
                <ArgumentList BeginColumn="38" BeginLine="2" EndColumn="47" EndLine="2" Image="" Label=""> 
                 <Expression BeginColumn="38" BeginLine="2" EndColumn="47" EndLine="2" Image="" Label=""> 
                  <PrimaryExpression BeginColumn="38" BeginLine="2" EndColumn="47" EndLine="2" Image="" Label=""> 
                   <PrimaryPrefix BeginColumn="38" BeginLine="2" EndColumn="47" EndLine="2" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                    <Literal BeginColumn="38" BeginLine="2" CharLiteral="false" EndColumn="47" EndLine="2" FloatLiteral="false" Image="&quot;abcdeeee&quot;" IntLiteral="false" Label="" SingleCharacterStringLiteral="false" StringLiteral="true"/> 
                   </PrimaryPrefix> 
                  </PrimaryExpression> 
                 </Expression> 
                </ArgumentList> 
               </Arguments> 
              </AllocationExpression> 
             </PrimaryPrefix> 
            </PrimaryExpression> 
           </Expression> 
          </VariableInitializer> 
         </VariableDeclarator> 
        </FieldDeclaration> 
       </ClassOrInterfaceBodyDeclaration> 
       <ClassOrInterfaceBodyDeclaration AnonymousInnerClass="false" BeginColumn="3" BeginLine="3" EndColumn="3" EndLine="9" EnumChild="false" Image="" Label=""> 
        <MethodDeclaration Abstract="false" BeginColumn="17" BeginLine="3" EndColumn="3" EndLine="9" Final="false" Image="" InterfaceMember="false" Label="" MethodName="main" Modifiers="17" Native="false" PackagePrivate="false" Private="false" Protected="false" Public="true" Static="true" Strictfp="false" Synchronized="false" SyntacticallyAbstract="false" SyntacticallyPublic="true" Transient="false" Void="true" Volatile="false"> 
         <ResultType BeginColumn="17" BeginLine="3" EndColumn="20" EndLine="3" Image="" Label="" Void="true" returnsArray="false"/> 
         <MethodDeclarator BeginColumn="22" BeginLine="3" EndColumn="40" EndLine="3" Image="main" Label="" ParameterCount="1"> 
          <FormalParameters BeginColumn="26" BeginLine="3" EndColumn="40" EndLine="3" Image="" Label="" ParameterCount="1"> 
           <FormalParameter Abstract="false" Array="true" ArrayDepth="1" BeginColumn="27" BeginLine="3" EndColumn="39" EndLine="3" Final="false" Image="" Label="" Modifiers="0" Native="false" PackagePrivate="true" Private="false" Protected="false" Public="false" Static="false" Strictfp="false" Synchronized="false" Transient="false" Varargs="false" Volatile="false"> 
            <Type Array="false" ArrayDepth="0" BeginColumn="27" BeginLine="3" EndColumn="32" EndLine="3" Image="" Label="" TypeImage="String"> 
             <ReferenceType Array="false" ArrayDepth="0" BeginColumn="27" BeginLine="3" EndColumn="32" EndLine="3" Image="" Label=""> 
              <ClassOrInterfaceType BeginColumn="27" BeginLine="3" EndColumn="32" EndLine="3" Image="String" Label=""/> 
             </ReferenceType> 
            </Type> 
            <VariableDeclaratorId Array="true" ArrayDepth="1" BeginColumn="34" BeginLine="3" EndColumn="39" EndLine="3" ExceptionBlockParameter="false" Image="args" Label=""/> 
           </FormalParameter> 
          </FormalParameters> 
         </MethodDeclarator> 
         <Block BeginColumn="42" BeginLine="3" EndColumn="3" EndLine="9" Image="" Label="" containsComment="false"> 
          <BlockStatement Allocation="true" BeginColumn="5" BeginLine="4" EndColumn="49" EndLine="4" Image="" Label=""> 
           <LocalVariableDeclaration Abstract="false" Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="4" EndColumn="48" EndLine="4" Final="false" Image="" Label="" Modifiers="0" Native="false" PackagePrivate="true" Private="false" Protected="false" Public="false" Static="false" Strictfp="false" Synchronized="false" Transient="false" VariableName="sb1" Volatile="false"> 
            <Type Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="4" EndColumn="16" EndLine="4" Image="" Label="" TypeImage="StringBuffer"> 
             <ReferenceType Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="4" EndColumn="16" EndLine="4" Image="" Label=""> 
              <ClassOrInterfaceType BeginColumn="5" BeginLine="4" EndColumn="16" EndLine="4" Image="StringBuffer" Label=""/> 
             </ReferenceType> 
            </Type> 
            <VariableDeclarator BeginColumn="18" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
             <VariableDeclaratorId Array="false" ArrayDepth="0" BeginColumn="18" BeginLine="4" EndColumn="20" EndLine="4" ExceptionBlockParameter="false" Image="sb1" Label=""/> 
             <VariableInitializer BeginColumn="24" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
              <Expression BeginColumn="24" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
               <PrimaryExpression BeginColumn="24" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
                <PrimaryPrefix BeginColumn="24" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                 <AllocationExpression BeginColumn="24" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
                  <ClassOrInterfaceType BeginColumn="28" BeginLine="4" EndColumn="39" EndLine="4" Image="StringBuffer" Label=""/> 
                  <Arguments ArgumentCount="1" BeginColumn="40" BeginLine="4" EndColumn="48" EndLine="4" Image="" Label=""> 
                   <ArgumentList BeginColumn="41" BeginLine="4" EndColumn="47" EndLine="4" Image="" Label=""> 
                    <Expression BeginColumn="41" BeginLine="4" EndColumn="47" EndLine="4" Image="" Label=""> 
                     <PrimaryExpression BeginColumn="41" BeginLine="4" EndColumn="47" EndLine="4" Image="" Label=""> 
                      <PrimaryPrefix BeginColumn="41" BeginLine="4" EndColumn="47" EndLine="4" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                       <Literal BeginColumn="41" BeginLine="4" CharLiteral="false" EndColumn="47" EndLine="4" FloatLiteral="false" Image="&quot;abcde&quot;" IntLiteral="false" Label="" SingleCharacterStringLiteral="false" StringLiteral="true"/> 
                      </PrimaryPrefix> 
                     </PrimaryExpression> 
                    </Expression> 
                   </ArgumentList> 
                  </Arguments> 
                 </AllocationExpression> 
                </PrimaryPrefix> 
               </PrimaryExpression> 
              </Expression> 
             </VariableInitializer> 
            </VariableDeclarator> 
           </LocalVariableDeclaration> 
          </BlockStatement> 
          <BlockStatement Allocation="false" BeginColumn="5" BeginLine="5" EndColumn="29" EndLine="5" Image="" Label=""> 
           <Statement BeginColumn="5" BeginLine="5" EndColumn="29" EndLine="5" Image="" Label=""> 
            <StatementExpression BeginColumn="5" BeginLine="5" EndColumn="28" EndLine="5" Image="" Label=""> 
             <PrimaryExpression BeginColumn="5" BeginLine="5" EndColumn="28" EndLine="5" Image="" Label=""> 
              <PrimaryPrefix BeginColumn="5" BeginLine="5" EndColumn="14" EndLine="5" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
               <Name BeginColumn="5" BeginLine="5" EndColumn="14" EndLine="5" Image="sb1.append" Label=""/> 
              </PrimaryPrefix> 
              <PrimarySuffix ArgumentCount="1" Arguments="true" ArrayDereference="false" BeginColumn="15" BeginLine="5" EndColumn="28" EndLine="5" Image="" Label=""> 
               <Arguments ArgumentCount="1" BeginColumn="15" BeginLine="5" EndColumn="28" EndLine="5" Image="" Label=""> 
                <ArgumentList BeginColumn="16" BeginLine="5" EndColumn="27" EndLine="5" Image="" Label=""> 
                 <Expression BeginColumn="16" BeginLine="5" EndColumn="27" EndLine="5" Image="" Label=""> 
                  <PrimaryExpression BeginColumn="16" BeginLine="5" EndColumn="27" EndLine="5" Image="" Label=""> 
                   <PrimaryPrefix BeginColumn="16" BeginLine="5" EndColumn="27" EndLine="5" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                    <Literal BeginColumn="16" BeginLine="5" CharLiteral="false" EndColumn="27" EndLine="5" FloatLiteral="false" Image="&quot;abcdefghij&quot;" IntLiteral="false" Label="" SingleCharacterStringLiteral="false" StringLiteral="true"/> 
                   </PrimaryPrefix> 
                  </PrimaryExpression> 
                 </Expression> 
                </ArgumentList> 
               </Arguments> 
              </PrimarySuffix> 
             </PrimaryExpression> 
            </StatementExpression> 
           </Statement> 
          </BlockStatement> 
          <BlockStatement Allocation="false" BeginColumn="5" BeginLine="6" EndColumn="37" EndLine="6" Image="" Label=""> 
           <LocalVariableDeclaration Abstract="false" Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="6" EndColumn="36" EndLine="6" Final="false" Image="" Label="" Modifiers="0" Native="false" PackagePrivate="true" Private="false" Protected="false" Public="false" Static="false" Strictfp="false" Synchronized="false" Transient="false" VariableName="sb2" Volatile="false"> 
            <Type Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="6" EndColumn="16" EndLine="6" Image="" Label="" TypeImage="StringBuffer"> 
             <ReferenceType Array="false" ArrayDepth="0" BeginColumn="5" BeginLine="6" EndColumn="16" EndLine="6" Image="" Label=""> 
              <ClassOrInterfaceType BeginColumn="5" BeginLine="6" EndColumn="16" EndLine="6" Image="StringBuffer" Label=""/> 
             </ReferenceType> 
            </Type> 
            <VariableDeclarator BeginColumn="18" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""> 
             <VariableDeclaratorId Array="false" ArrayDepth="0" BeginColumn="18" BeginLine="6" EndColumn="20" EndLine="6" ExceptionBlockParameter="false" Image="sb2" Label=""/> 
             <VariableInitializer BeginColumn="24" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""> 
              <Expression BeginColumn="24" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""> 
               <PrimaryExpression BeginColumn="24" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""> 
                <PrimaryPrefix BeginColumn="24" BeginLine="6" EndColumn="34" EndLine="6" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                 <Name BeginColumn="24" BeginLine="6" EndColumn="34" EndLine="6" Image="sb1.reverse" Label=""/> 
                </PrimaryPrefix> 
                <PrimarySuffix ArgumentCount="0" Arguments="true" ArrayDereference="false" BeginColumn="35" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""> 
                 <Arguments ArgumentCount="0" BeginColumn="35" BeginLine="6" EndColumn="36" EndLine="6" Image="" Label=""/> 
                </PrimarySuffix> 
               </PrimaryExpression> 
              </Expression> 
             </VariableInitializer> 
            </VariableDeclarator> 
           </LocalVariableDeclaration> 
          </BlockStatement> 
          <BlockStatement Allocation="false" BeginColumn="5" BeginLine="7" EndColumn="28" EndLine="7" Image="" Label=""> 
           <Statement BeginColumn="5" BeginLine="7" EndColumn="28" EndLine="7" Image="" Label=""> 
            <StatementExpression BeginColumn="5" BeginLine="7" EndColumn="27" EndLine="7" Image="" Label=""> 
             <PrimaryExpression BeginColumn="5" BeginLine="7" EndColumn="27" EndLine="7" Image="" Label=""> 
              <PrimaryPrefix BeginColumn="5" BeginLine="7" EndColumn="22" EndLine="7" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
               <Name BeginColumn="5" BeginLine="7" EndColumn="22" EndLine="7" Image="System.out.println" Label=""/> 
              </PrimaryPrefix> 
              <PrimarySuffix ArgumentCount="1" Arguments="true" ArrayDereference="false" BeginColumn="23" BeginLine="7" EndColumn="27" EndLine="7" Image="" Label=""> 
               <Arguments ArgumentCount="1" BeginColumn="23" BeginLine="7" EndColumn="27" EndLine="7" Image="" Label=""> 
                <ArgumentList BeginColumn="24" BeginLine="7" EndColumn="26" EndLine="7" Image="" Label=""> 
                 <Expression BeginColumn="24" BeginLine="7" EndColumn="26" EndLine="7" Image="" Label=""> 
                  <PrimaryExpression BeginColumn="24" BeginLine="7" EndColumn="26" EndLine="7" Image="" Label=""> 
                   <PrimaryPrefix BeginColumn="24" BeginLine="7" EndColumn="26" EndLine="7" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                    <Name BeginColumn="24" BeginLine="7" EndColumn="26" EndLine="7" Image="sb1" Label=""/> 
                   </PrimaryPrefix> 
                  </PrimaryExpression> 
                 </Expression> 
                </ArgumentList> 
               </Arguments> 
              </PrimarySuffix> 
             </PrimaryExpression> 
            </StatementExpression> 
           </Statement> 
          </BlockStatement> 
          <BlockStatement Allocation="false" BeginColumn="5" BeginLine="8" EndColumn="28" EndLine="8" Image="" Label=""> 
           <Statement BeginColumn="5" BeginLine="8" EndColumn="28" EndLine="8" Image="" Label=""> 
            <StatementExpression BeginColumn="5" BeginLine="8" EndColumn="27" EndLine="8" Image="" Label=""> 
             <PrimaryExpression BeginColumn="5" BeginLine="8" EndColumn="27" EndLine="8" Image="" Label=""> 
              <PrimaryPrefix BeginColumn="5" BeginLine="8" EndColumn="22" EndLine="8" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
               <Name BeginColumn="5" BeginLine="8" EndColumn="22" EndLine="8" Image="System.out.println" Label=""/> 
              </PrimaryPrefix> 
              <PrimarySuffix ArgumentCount="1" Arguments="true" ArrayDereference="false" BeginColumn="23" BeginLine="8" EndColumn="27" EndLine="8" Image="" Label=""> 
               <Arguments ArgumentCount="1" BeginColumn="23" BeginLine="8" EndColumn="27" EndLine="8" Image="" Label=""> 
                <ArgumentList BeginColumn="24" BeginLine="8" EndColumn="26" EndLine="8" Image="" Label=""> 
                 <Expression BeginColumn="24" BeginLine="8" EndColumn="26" EndLine="8" Image="" Label=""> 
                  <PrimaryExpression BeginColumn="24" BeginLine="8" EndColumn="26" EndLine="8" Image="" Label=""> 
                   <PrimaryPrefix BeginColumn="24" BeginLine="8" EndColumn="26" EndLine="8" Image="" Label="" SuperModifier="false" ThisModifier="false"> 
                    <Name BeginColumn="24" BeginLine="8" EndColumn="26" EndLine="8" Image="sb2" Label=""/> 
                   </PrimaryPrefix> 
                  </PrimaryExpression> 
                 </Expression> 
                </ArgumentList> 
               </Arguments> 
              </PrimarySuffix> 
             </PrimaryExpression> 
            </StatementExpression> 
           </Statement> 
          </BlockStatement> 
         </Block> 
        </MethodDeclaration> 
       </ClassOrInterfaceBodyDeclaration> 
      </ClassOrInterfaceBody> 
     </ClassOrInterfaceDeclaration> 
    </TypeDeclaration> 
</CompilationUnit>

來源

2012-01-31 Tirtha

回答

0

我不認爲它有可能，workes一在任何方法中聲明的局部變量和任何類中的第一個參數。這裏最大的問題是，一旦你在一個謂詞中並且指定了一個將返回多個節點的路徑，謂詞就只應用於第一個節點。

例如，在下面的代碼中，//LocalVariableDeclaration/.../VariableDeclaratorId應該與所有局部變量進行比較，但只匹配與字符串緩衝區謂詞匹配的第一個LocalVariable。 XPath 2.0中有一個用於支持這些類型查詢的for結構，但目前尚不支持PMD。

... and contains(@Image, 
//LocalVariableDeclaration[descendant::ClassOrInterfaceType[@Image='StringBuffer']] 
/VariableDeclarator/VariableDeclaratorId/@Image)]

來源

2012-02-02 16:19:57

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