模式匹配解析器

Question

其實，我建了一個Java代碼來分析下面的文本文件：

 (FAMIX.Attribute (id: 22) 
(name 'obj_I') 
(parentType (ref: 11)) 
(declaredType (ref: 27)) 
(isPrivate true) 
    ) 

    (FAMIX.Attribute (id: 38) 
(name 'obj_k') 
(parentType (ref: 34)) 
(declaredType (ref: 43)) 
(isPrivate true) 
    ) 

    (FAMIX.Attribute (id: 56) 
(name 'obj_K') 
(parentType (ref: 46)) 
(declaredType (ref: 43)) 
(isPrivate true) 
    ) 

    (FAMIX.Attribute (id: 73) 
(name 'obj_L') 
(parentType (ref: 64)) 
(declaredType (ref: 45)) 
(isPrivate true) 
    ) 

(FAMIX.Attribute (id: 67) 
(name 'obj_G') 
(parentType (ref: 64)) 
(declaredType (ref: 46)) 
(isPrivate true) 
    ) 

(FAMIX.Attribute (id: 93) 
(name 'classD') 
(parentType (ref: 85)) 
(declaredType (ref: 94)) 
(isPrivate true) 
    ) 

    (FAMIX.Attribute (id: 99) 
(name 'classC') 
(parentType (ref: 86)) 
(declaredType(ref: 86)) 
(isPackage true) 
    ) 

(FAMIX.Attribute (id: 114) 
(name 'classB') 
(parentType (ref: 94)) 
(declaredType (ref: 11)) 
(isPrivate true) 
    ) 

    (FAMIX.Attribute (id: 107) 
(name 'obj_c') 
(parentType (ref: 94)) 
(declaredType (ref: 86)) 
(isPrivate true) 
    ) 

的Java代碼：

// Find Attributes 

Pattern p111 = Pattern.compile("FAMIX.Attribute"); 

Matcher m111 = p111.matcher(line); 
while (m111.find()) { 

    FAMIXAttribute obj = new FAMIXAttribute();    
    Pattern p222 = Pattern.compile("id:\\s*([0-9]+)"); 
    Matcher m222 = p222.matcher(line); 

    while (m222.find()) { 
     System.out.print(m222.group(1)); 
    } 

    while ((line = br.readLine()) != null && !(line.contains("FAMIX"))) { 

     Pattern p333 = Pattern.compile("name\\s*'([\\w]+)\\s*'"); 
     Matcher m333 = p333.matcher(line); 

     while (m333.find()) {  

      System.out.print(m333.group(1)); 
     } 

     Pattern p555 = Pattern.compile("parentType\\s*\\(ref:\\s*([0-9]+)\\)"); 
     Matcher m555 = p555.matcher(line); 
     while (m555.find()) { 
      System.out.print(m555.group(1)); 
     } 

     Pattern p666 = Pattern.compile("declaredType\\s*\\(ref:\\s*([0-9]+)\\)"); 
     Matcher m666 = p666.matcher(line); 
     while (m666.find()) { 
      System.out.print(m666.group(1)); 
     } 

    } 

} // exit from finding Attribute 

輸出：基於

 ***************** Attributes ***************** 
     obj_k 38 34 43 
     obj_L 73 64 45 
     classD 93 85 94 
     classB 114 94 11 

輸出，問題是解析器跳過一些輸出（跳轉）

請讓我知道如果問題不清楚，我會盡力進一步澄清。

Answer 1

你忘了正則表達式來檢查IsPrivate或IsPackage部分

編輯： 有幾個步驟，會告訴你什麼地方出了錯 添加行的打印輸出，看看到底是什麼線失敗和模式如何看待他們

 // Find Attributes 
       System.out.print("***"+line+"***"); 
       Pattern p111 = Pattern.compile("FAMIX.Attribute"); 
       Matcher m111 = p111.matcher(line); 
       while (m111.find()) { 

的"***"會給你確切的開始和該行的結束，關於Java的意識。 有時對於匹配器而言，看起來與眼睛相同的字符是不同的。

編輯2： 您的代碼缺少外循環，其中行首次讀取。 你意識到代碼：

    while ((line = br.readLine()) != null && !(line.contains("FAMIX"))) { 

消耗，其中「FAMIX.Attribute」出現在下一行？如果你在（缺少的）外部循環中做了另一次閱讀，你將會錯過其他所有記錄。

Answer 2

如果您確信該文件包含的確切格式以線條爲規定：

• 每個id，name，parentType，declaredType必須完全在一行中聲明。即你沒有這樣的輸入：

  (FAMIX.Attribute (id: 
  38) 
  (name 
  'obj_k') 
  (parentType 
      (ref: 34)) 
  (declaredType (ref: 43)) 
  (isPrivate true) 
  ) 
  

  但是，這是可以的：

  (FAMIX.Attribute (id: 38) 
  (name 'obj_k') (parentType (ref: 34)) (declaredType (ref: 43)) (isPrivate true)) 
  

這是先決條件低於的修改工作。 這個假設來自您當前的代碼。

String line; 

FAMIXAttribute obj = new FAMIXAttribute(); 
boolean isModified = false; 

while ((line = br.readLine()) != null) { 
    if (line.contains("FAMIX.Attribute")) { 
     if (isModified) { 
      // TODO: Save the previous obj 

      obj = new FAMIXAttribute(); 
      isModified = false; 
     } 
    } 

    // TODO: Add the block of code to parse id here 
    // TODO: Add id attribute to obj, set isModified to true 

    // TODO: Add the block of code to parse other stuffs here 
    // TODO: Add those attributes to obj, set isModified to true 
} 

if (isModified) { 
    // TODO: Save the last obj 
}