wilson.txt

用C++编的小程序。

  implements Enumeration
{
  public static final int RECLS_F_FILES           = 0x00000001;
  public static final int RECLS_F_DIRECTORIES     = 0x00000002;
  public static final int RECLS_F_LINKS           = 0x00000004;
  public static final int RECLS_F_DEVICES         = 0x00000008;
  public static final int RECLS_F_RECURSIVE       = 0x00010000;
  public static final int RECLS_F_NO_FOLLOW_LINKS = 0x00020000;
  public static final int RECLS_F_DIRECTORY_PARTS = 0x00040000;
  public static final int RECLS_F_DETAILS_LATER   = 0x00080000;

  private Search(String searchRoot, String pattern, int flags)
  {
    // Ctors cannot be native
    m_hSearch = Initialise(searchRoot, pattern, flags);
  }
  public native void Close();
  public void Finalize()
  {
    Close();
  }
  public static Search MakeSearch(String searchRoot, String pattern, 
                                            int flags) throws ReclsException
  {
    return new Search(searchRoot, pattern, flags);
  }
  public final native boolean hasMoreElements();
  public final native Object nextElement();
/// Native method implementations
  private native int Initialise(String searchRoot,String pattern,int flags);
// Implementation
  static 
  {
    System.loadLibrary("recls_jni");
  }
/// Members
  private int   m_hSearch;
  private int   m_rc;
}

Listing 5:

/* /////////////////////////////////////////////////////////////
 * Extract from recls_Search.cpp
 * www:    www.synesis.com.au/software
 * Copyright (C) 2002, Synesis Software Pty Ltd.
 * (Licensed under the Synesis Software Standard Source License:
 *  http://www.synesis.com.au/licenses/ssssl.html)
 * ////////////////////////////////////////////////////////// */

const char CLSNM_ENTRY[]          = "Lorg/recls/Entry;";
const char CLSNM_STRING[]         = "Ljava/lang/String;";
const char CLSNM_NOSUCHELEMENTX[] = "Ljava/lang/NoSuchElementException;";
const char CLSNM_ILLEGALSTATEX[]  = "Ljava/lang/IllegalStateException;";
const char FIELDNAME_HSRCH[]      = "m_hSearch";

jfieldID GetSearchFieldID(JNIEnv *henv, jobject obj)
{
  jclass    clsEntry  = henv->GetObjectClass(obj);
  jfieldID  fid       = henv->GetFieldID(clsEntry, FIELDNAME_HSRCH, "I");
  return fid;
}
hrecls_t SearchFromJObject(JNIEnv *henv, jobject obj)
{
  jfieldID  fid = GetSearchFieldID(henv, obj);
  return reinterpret_cast<hrecls_t>(henv->GetIntField(obj, fid));
}
void ThrowException(JNIEnv *henv, char const *className, char const *message)
{
  va_list args;
  va_start(args, message);
  jclass  clsX  = henv->FindClass(className);
  if(NULL != clsX)
  {
    henv->ThrowNew(clsX, message);
    henv->DeleteLocalRef(clsX);
  }
  va_end(args);
}
jstring StringFromRange(JNIEnv *henv, recls_char_t const *from, 
                                                   recls_char_t const *to)
{
  typedef  stlsoft::auto_buffer<recls_char_t
                              , stlsoft::malloc_allocator<recls_char_t>
                              , RECLS_PATH_MAX
                              >                 buffer_t;
  buffer_t  buffer(1 + (to - from));
#ifdef RECLS_CHAR_TYPE_IS_CHAR
  strncpy(buffer, from, buffer.size() - 1);
  buffer[buffer.size() - 1] = 0;
    return henv->NewStringUTF(buffer);
#elif defined(RECLS_CHAR_TYPE_IS_WCHAR
  wcsncpy(buffer, from, buffer.size() - 1);
  buffer[buffer.size() - 1] = 0;
  return henv->NewString(buffer);
#else /* ?char type */
# error recls char type must be discriminated
#endif /* char type */
}
JNIEXPORT jobject JNICALL Java_org_recls_Search_nextElement
  (JNIEnv *henv, jobject obj)
{
  hrecls_t    hSrch = SearchFromJObject(henv, obj);
  recls_rc_t  rc;
  jobject     entry;
  if( NULL == hSrch ||
      RECLS_FAILED(rc = Recls_GetLastError(hSrch)))
  {
    ThrowException(henv, CLSNM_NOSUCHELEMENTX, "No more elements in search");
    entry = NULL;
  }
  else
  {
    recls_info_t  hEntry;
    // (i) Get the details of the current position ...
    rc = Recls_GetDetails(hSrch, &hEntry);
    if(RECLS_SUCCEEDED(rc))
    {
      jclass        clsEntry      = henv->FindClass(CLSNM_ENTRY);
      jmethodID     midEntryCtor  = henv->GetMethodID(clsEntry, "<init>", 
                                 "(ILjava/lang/String;[Ljava/lang/String;)V");
      size_t        cDirParts     = Recls_GetDirectoryPartProperty(hEntry, 
                                                                 -1, NULL, 0);
      jstring       path          = StringFromRange(henv, hEntry->path.begin, 
                                                            hEntry->path.end);
      jclass        clsString     = henv->FindClass(CLSNM_STRING);
      jobjectArray  dirParts      = henv->NewObjectArray(cDirParts, 
                                                            clsString, NULL);
      for(size_t i = 0; i < cDirParts; ++i)
      {
        recls_strptrs_t const *part = hEntry->directoryParts.begin + i;
        jstring dirPart = StringFromRange(henv, part->begin, part->end);
        henv->SetObjectArrayElement(dirParts, i, dirPart);
      }
      entry = henv->NewObject(clsEntry, midEntryCtor, hEntry, path, dirParts);
      // (ii) ... and then advance to the next
      rc = Recls_GetNext(hSrch);
      if(RECLS_FAILED(rc))
      {
        jfieldID  fid = GetSearchFieldID(henv, obj);
        henv->SetIntField(obj, fid, 0);
        Recls_SearchClose(hSrch);
      }
    }
    else
    {
     ThrowException(henv,CLSNM_ILLEGALSTATEX,"Search entry retrieval failed");
    }
  }
  return entry; 
}


Listing 6:

/* /////////////////////////////////////////////////////////////
 * Extract from org/recls/Search.java
 * www:    http://www.recls.org/
 * Copyright (C) 2002, Synesis Software Pty Ltd.
 * (Licensed under the Synesis Software Standard Source License:
 *  http://www.synesis.com.au/licenses/ssssl.html)
 * ////////////////////////////////////////////////////////// */

package org.recls;
import java.util.Date;
public class Entry
{
  private Entry(int hEntry, String path, String[] directoryParts)
  {
    m_hEntry          = hEntry;
    m_path            = path;
    m_directoryParts  = directoryParts;
  }
  public native void Close();
  public void Finalize()
  {
    Close();
  }
// Properties
  public String     getPath()
  {
    return m_path;
  }
  public native char    getDrive();
  public native String  getDirectory();
  public native String  getDirectoryPath();
  public String[]     getDirectoryParts()
  {
    return m_directoryParts;
  }
  public native String  getFile();
  public native String  getShortFile();
  public native String  getFileName();
  public native String  getFileExt();
  public Date       getCreationTime()
  {
    return new Date(getCreationTime_());
  }
  public Date       getModificationTime()
  {
    return new Date(getModificationTime_());
  }
  public Date       getLastAccessTime()
  {
    return new Date(getLastAccessTime_());
  }
  public Date       getLastStatusChangeTime()
  {
    return new Date(getLastStatusChangeTime_());
  }
  public native long    getSize();
  public native boolean isReadOnly();
  public native boolean isDirectory();
  public native boolean isLink();
  public String toString()
  {
    return m_path;
  }
// Implementation methods
  public native long    getCreationTime_();
  public native long    getModificationTime_();
  public native long    getLastAccessTime_();
  public native long    getLastStatusChangeTime_();
// Members
  private int     m_hEntry; // The opaque handle to the entry
  private String    m_path;
  private String[]  m_directoryParts;
}

Listing  7:

/* /////////////////////////////////////////////////////////////
 * Extract from org/recls/Search.java
 * www:    http://www.recls.org/
 * Copyright (C) 2002, Synesis Software Pty Ltd.
 * (Licensed under the Synesis Software Standard Source License:
 *  http://www.synesis.com.au/licenses/ssssl.html)
 * ////////////////////////////////////////////////////////// */

import org.recls.Entry;
import org.recls.ReclsException;
import org.recls.Search;
import java.util.Enumeration;
public class recls_test
{
  public static void main(String[] args)
  {
    . . . // deduce dir, pattern and flags
    try
    {
      Search  search  = Search.MakeSearch(rootDir, pattern, flags);
      for(Enumeration en = search; en.hasMoreElements(); ++total)
      {
        Object  el  = en.nextElement();
        System.out.println(el);
        if(!bSuccinct)
        {
          Entry entry = (Entry)el;
          System.out.println(" Path:           " + entry.getPath());
          System.out.println(" Drive:          " + entry.getDrive());
          System.out.println(" Directory:      " + entry.getDirectory());
          System.out.println(" DirectoryPath:  " + entry.getDirectoryPath());
          if((flags & Search.RECLS_F_DIRECTORY_PARTS) == 
                                              Search.RECLS_F_DIRECTORY_PARTS)
          {
            String[]  dirParts  = entry.getDirectoryParts();
            for(int j = 0; j < dirParts.length; ++j)
            {
              System.out.println("    " + dirParts[j]);
            }
          }
          System.out.println(" File:             " + entry.getFile());
          System.out.println(" ShortFile:        " + entry.getShortFile());
          System.out.println(" FileName:         " + entry.getFileName());
          System.out.println(" FileExtL          " + entry.getFileExt());
          System.out.println(" Size:             " + entry.getSize());
          System.out.println(" CreationTime:     " + entry.getCreationTime());
          System.out.println(" ModificationTime: " + entry.getModificationTime());
          System.out.println(" LastAccessTime:   " + entry.getLastAccessTime());
          System.out.println(" LastStatusChangeTime: " + entry.getLastStatusChangeTime());
          System.out.println(" isReadOnly:       " + entry.isReadOnly());
          System.out.println(" isDirectory:      " + entry.isDirectory());
          System.out.println(" isLink:           " + entry.isLink());
        }
      }
      search.Close();
      System.out.println("  Total matched: " + total);
    }
    catch(ReclsException x)
    {
      System.out.println(x);
    }
  }
}







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