aoqi@0: /*
aoqi@0:  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.  Oracle designates this
aoqi@0:  * particular file as subject to the "Classpath" exception as provided
aoqi@0:  * by Oracle in the LICENSE file that accompanied this code.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: package com.sun.xml.internal.org.jvnet.staxex;
aoqi@0: 
aoqi@0: import javax.activation.DataHandler;
aoqi@0: import javax.activation.DataSource;
aoqi@0: import java.io.ByteArrayInputStream;
aoqi@0: import java.io.ByteArrayOutputStream;
aoqi@0: import java.io.File;
aoqi@0: import java.io.FileOutputStream;
aoqi@0: import java.io.IOException;
aoqi@0: import java.io.InputStream;
aoqi@0: import java.io.OutputStream;
aoqi@0: import javax.xml.stream.XMLStreamException;
aoqi@0: import javax.xml.stream.XMLStreamWriter;
aoqi@0: import java.util.logging.Level;
aoqi@0: import java.util.logging.Logger;
aoqi@0: 
aoqi@0: // for testing method
aoqi@0: //import com.sun.xml.internal.stream.writers.XMLStreamWriterImpl;
aoqi@0: //import java.io.FileNotFoundException;
aoqi@0: //import java.io.FileWriter;
aoqi@0: //import javax.activation.FileDataSource;
aoqi@0: 
aoqi@0: /**
aoqi@0:  * Binary data represented as base64-encoded string
aoqi@0:  * in XML.
aoqi@0:  *
aoqi@0:  * <p>
aoqi@0:  * Used in conjunction with {@link XMLStreamReaderEx}
aoqi@0:  * and {@link XMLStreamWriterEx}.
aoqi@0:  *
aoqi@0:  * @author Kohsuke Kawaguchi, Martin Grebac
aoqi@0:  */
aoqi@0: public class Base64Data implements CharSequence, Cloneable {
aoqi@0: 
aoqi@0:     // either dataHandler or (data,dataLen,mimeType?) must be present
aoqi@0:     // (note that having both is allowed)
aoqi@0: 
aoqi@0:     private DataHandler dataHandler;
aoqi@0:     private byte[] data;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Length of the valid data in {@link #data}.
aoqi@0:      */
aoqi@0:     private int dataLen;
aoqi@0:     /**
aoqi@0:      * True if {@link #data} can be cloned by reference
aoqi@0:      * if Base64Data instance is cloned.
aoqi@0:      */
aoqi@0:     private boolean dataCloneByRef;
aoqi@0:     /**
aoqi@0:      * Optional MIME type of {@link #data}.
aoqi@0:      *
aoqi@0:      * Unused when {@link #dataHandler} is set.
aoqi@0:      * Use {@link DataHandler#getContentType()} in that case.
aoqi@0:      */
aoqi@0:     private String mimeType;
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Default constructor
aoqi@0:      */
aoqi@0:     public Base64Data() {
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final Logger logger = Logger.getLogger(Base64Data.class.getName());
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Clone constructor
aoqi@0:      * @param that needs to be cloned
aoqi@0:      */
aoqi@0:     public Base64Data(Base64Data that) {
aoqi@0:         that.get();
aoqi@0:         if (that.dataCloneByRef) {
aoqi@0:             this.data = that.data;
aoqi@0:         } else {
aoqi@0:             this.data = new byte[that.dataLen];
aoqi@0:             System.arraycopy(that.data, 0, this.data, 0, that.dataLen);
aoqi@0:         }
aoqi@0: 
aoqi@0:         this.dataCloneByRef = true;
aoqi@0:         this.dataLen = that.dataLen;
aoqi@0:         this.dataHandler = null;
aoqi@0:         this.mimeType = that.mimeType;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Fills in the data object by a portion of the byte[].
aoqi@0:      *
aoqi@0:      * @param data actual data
aoqi@0:      * @param len
aoqi@0:      *      data[0] to data[len-1] are treated as the data.
aoqi@0:      * @param mimeType MIME type
aoqi@0:      * @param cloneByRef
aoqi@0:      *      true if data[] can be cloned by reference
aoqi@0:      */
aoqi@0:     public void set(byte[] data, int len, String mimeType, boolean cloneByRef) {
aoqi@0:         this.data = data;
aoqi@0:         this.dataLen = len;
aoqi@0:         this.dataCloneByRef = cloneByRef;
aoqi@0:         this.dataHandler = null;
aoqi@0:         this.mimeType = mimeType;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Fills in the data object by a portion of the byte[].
aoqi@0:      *
aoqi@0:      * @param data actual data bytes
aoqi@0:      * @param len
aoqi@0:      *      data[0] to data[len-1] are treated as the data.
aoqi@0:      * @param mimeType MIME type
aoqi@0:      */
aoqi@0:     public void set(byte[] data, int len, String mimeType) {
aoqi@0:         set(data,len,mimeType,false);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Fills in the data object by the byte[] of the exact length.
aoqi@0:      *
aoqi@0:      * @param data
aoqi@0:      *      this buffer may be owned directly by the unmarshaleld JAXB object.
aoqi@0:      * @param mimeType MIME type
aoqi@0:      */
aoqi@0:     public void set(byte[] data,String mimeType) {
aoqi@0:         set(data,data.length,mimeType,false);
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Fills in the data object by a {@link DataHandler}.
aoqi@0:      *
aoqi@0:      * @param data DataHandler for the data
aoqi@0:      */
aoqi@0:     public void set(DataHandler data) {
aoqi@0:         assert data!=null;
aoqi@0:         this.dataHandler = data;
aoqi@0:         this.data = null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the raw data. If the returned DataHandler is {@link StreamingDataHandler},
aoqi@0:      * callees may need to downcast to take advantage of its capabilities.
aoqi@0:      *
aoqi@0:      * @see StreamingDataHandler
aoqi@0:      * @return DataHandler for the data
aoqi@0:      */
aoqi@0:     public DataHandler getDataHandler() {
aoqi@0:         if(dataHandler==null){
aoqi@0:             dataHandler = new Base64StreamingDataHandler(new Base64DataSource());
aoqi@0:         } else if (!(dataHandler instanceof StreamingDataHandler)) {
aoqi@0:             dataHandler = new FilterDataHandler(dataHandler);
aoqi@0:         }
aoqi@0:         return dataHandler;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private final class Base64DataSource implements DataSource {
aoqi@0:         public String getContentType() {
aoqi@0:             return getMimeType();
aoqi@0:         }
aoqi@0: 
aoqi@0:         public InputStream getInputStream() {
aoqi@0:             return new ByteArrayInputStream(data,0,dataLen);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String getName() {
aoqi@0:             return null;
aoqi@0:         }
aoqi@0: 
aoqi@0:         public OutputStream getOutputStream() {
aoqi@0:             throw new UnsupportedOperationException();
aoqi@0:         }
aoqi@0: 
aoqi@0:     }
aoqi@0: 
aoqi@0:     private final class Base64StreamingDataHandler extends StreamingDataHandler {
aoqi@0: 
aoqi@0:         Base64StreamingDataHandler(DataSource source) {
aoqi@0:             super(source);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public InputStream readOnce() throws IOException {
aoqi@0:             return getDataSource().getInputStream();
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void moveTo(File dst) throws IOException {
aoqi@0:             FileOutputStream fout = new FileOutputStream(dst);
aoqi@0:             try {
aoqi@0:                 fout.write(data, 0, dataLen);
aoqi@0:             } finally {
aoqi@0:                 fout.close();
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void close() throws IOException {
aoqi@0:             // nothing to do
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final class FilterDataHandler extends StreamingDataHandler {
aoqi@0: 
aoqi@0:         FilterDataHandler(DataHandler dh) {
aoqi@0:             super(dh.getDataSource());
aoqi@0:         }
aoqi@0: 
aoqi@0:         public InputStream readOnce() throws IOException {
aoqi@0:             return getDataSource().getInputStream();
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void moveTo(File dst) throws IOException {
aoqi@0:             byte[] buf = new byte[8192];
aoqi@0:             InputStream in = null;
aoqi@0:             OutputStream out = null;
aoqi@0:             try {
aoqi@0:                 in = getDataSource().getInputStream();
aoqi@0:                 out = new FileOutputStream(dst);
aoqi@0:                 while (true) {
aoqi@0:                     int amountRead = in.read(buf);
aoqi@0:                     if (amountRead == -1) {
aoqi@0:                         break;
aoqi@0:                     }
aoqi@0:                     out.write(buf, 0, amountRead);
aoqi@0:                 }
aoqi@0:             } finally {
aoqi@0:                 if (in != null) {
aoqi@0:                     try {
aoqi@0:                         in.close();
aoqi@0:                     } catch(IOException ioe) {
aoqi@0:                         // nothing to do
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:                 if (out != null) {
aoqi@0:                     try {
aoqi@0:                         out.close();
aoqi@0:                     } catch(IOException ioe) {
aoqi@0:                         // nothing to do
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         public void close() throws IOException {
aoqi@0:             // nothing to do
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the byte[] of the exact length.
aoqi@0:      *
aoqi@0:      * @return byte[] for data
aoqi@0:      */
aoqi@0:     public byte[] getExact() {
aoqi@0:         get();
aoqi@0:         if(dataLen!=data.length) {
aoqi@0:             byte[] buf = new byte[dataLen];
aoqi@0:             System.arraycopy(data,0,buf,0,dataLen);
aoqi@0:             data = buf;
aoqi@0:         }
aoqi@0:         return data;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the data as an {@link InputStream}.
aoqi@0:      *
aoqi@0:      * @return data as InputStream
aoqi@0:      * @throws IOException if i/o error occurs
aoqi@0:      */
aoqi@0:     public InputStream getInputStream() throws IOException {
aoqi@0:         if(dataHandler!=null) {
aoqi@0:             return dataHandler.getInputStream();
aoqi@0:         } else {
aoqi@0:             return new ByteArrayInputStream(data,0,dataLen);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns false if this object only has {@link DataHandler} and therefore
aoqi@0:      * {@link #get()} operation is likely going to be expensive.
aoqi@0:      *
aoqi@0:      * @return false if it has only DataHandler
aoqi@0:      */
aoqi@0:     public boolean hasData() {
aoqi@0:         return data!=null;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the raw data. The size of the byte array maybe larger than the actual length.
aoqi@0:      *
aoqi@0:      * @return data as byte[], the array may be larger
aoqi@0:      */
aoqi@0:     public byte[] get() {
aoqi@0:         if(data==null) {
aoqi@0:             try {
aoqi@0:                 ByteArrayOutputStreamEx baos = new ByteArrayOutputStreamEx(1024);
aoqi@0:                 InputStream is = dataHandler.getDataSource().getInputStream();
aoqi@0:                 baos.readFrom(is);
aoqi@0:                 is.close();
aoqi@0:                 data = baos.getBuffer();
aoqi@0:                 dataLen = baos.size();
aoqi@0:                 dataCloneByRef = true;
aoqi@0:             } catch (IOException e) {
aoqi@0:                 // TODO: report the error to the unmarshaller
aoqi@0:                 dataLen = 0;    // recover by assuming length-0 data
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return data;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the length of the binary data counted in bytes.
aoqi@0:      *
aoqi@0:      * Note that if this object encapsulates {@link DataHandler},
aoqi@0:      * this method would have to read the whole thing into {@code byte[]}
aoqi@0:      * just to count the length, because {@link DataHandler}
aoqi@0:      * doesn't easily expose the length.
aoqi@0:      *
aoqi@0:      * @return no of bytes
aoqi@0:      */
aoqi@0:     public int getDataLen() {
aoqi@0:         get();
aoqi@0:         return dataLen;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public String getMimeType() {
aoqi@0:         if (mimeType==null) {
aoqi@0:             return "application/octet-stream";
aoqi@0:         }
aoqi@0:         return mimeType;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Gets the number of characters needed to represent
aoqi@0:      * this binary data in the base64 encoding.
aoqi@0:      */
aoqi@0:     public int length() {
aoqi@0:         // for each 3 bytes you use 4 chars
aoqi@0:         // if the remainder is 1 or 2 there will be 4 more
aoqi@0:         get();  // fill in the buffer if necessary
aoqi@0:         return ((dataLen+2)/3)*4;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Encode this binary data in the base64 encoding
aoqi@0:      * and returns the character at the specified position.
aoqi@0:      */
aoqi@0:     public char charAt(int index) {
aoqi@0:         // we assume that the length() method is called before this method
aoqi@0:         // (otherwise how would the caller know that the index is valid?)
aoqi@0:         // so we assume that the byte[] is already populated
aoqi@0: 
aoqi@0:         int offset = index%4;
aoqi@0:         int base = (index/4)*3;
aoqi@0: 
aoqi@0:         byte b1,b2;
aoqi@0: 
aoqi@0:         switch(offset) {
aoqi@0:         case 0:
aoqi@0:             return Base64Encoder.encode(data[base]>>2);
aoqi@0:         case 1:
aoqi@0:             if (base+1<dataLen) {
aoqi@0:                 b1 = data[base+1];
aoqi@0:             } else {
aoqi@0:                 b1 = 0;
aoqi@0:             }
aoqi@0:             return Base64Encoder.encode(
aoqi@0:                         ((data[base]&0x3)<<4) |
aoqi@0:                         ((b1>>4)&0xF));
aoqi@0:         case 2:
aoqi@0:             if (base+1<dataLen) {
aoqi@0:                 b1 = data[base+1];
aoqi@0:                 if (base+2<dataLen) {
aoqi@0:                     b2 = data[base+2];
aoqi@0:                 } else {
aoqi@0:                     b2 = 0;
aoqi@0:                 }
aoqi@0: 
aoqi@0:                 return Base64Encoder.encode(
aoqi@0:                             ((b1&0xF)<<2)|
aoqi@0:                             ((b2>>6)&0x3));
aoqi@0:             } else {
aoqi@0:                 return '=';
aoqi@0:             }
aoqi@0:         case 3:
aoqi@0:             if(base+2<dataLen) {
aoqi@0:                 return Base64Encoder.encode(data[base+2]&0x3F);
aoqi@0:             } else {
aoqi@0:                 return '=';
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         throw new IllegalStateException();
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Internally this is only used to split a text to a list,
aoqi@0:      * which doesn't happen that much for base64.
aoqi@0:      * So this method should be smaller than faster.
aoqi@0:      */
aoqi@0:     public CharSequence subSequence(int start, int end) {
aoqi@0:         StringBuilder buf = new StringBuilder();
aoqi@0:         get();  // fill in the buffer if we haven't done so
aoqi@0:         for (int i=start; i<end; i++ ) {
aoqi@0:             buf.append(charAt(i));
aoqi@0:         }
aoqi@0:         return buf;
aoqi@0:     }
aoqi@0: 
aoqi@0:     /**
aoqi@0:      * Returns the base64 encoded string of this data.
aoqi@0:      */
aoqi@0:     @Override
aoqi@0:     public String toString() {
aoqi@0:         get();  // fill in the buffer
aoqi@0:         return Base64Encoder.print(data, 0, dataLen);
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void writeTo(char[] buf, int start) {
aoqi@0:         get();
aoqi@0:         Base64Encoder.print(data, 0, dataLen, buf, start);
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static final int CHUNK_SIZE;
aoqi@0:     static {
aoqi@0:         int bufSize = 1024;
aoqi@0:         try {
aoqi@0:             String bufSizeStr = getProperty("com.sun.xml.internal.org.jvnet.staxex.Base64DataStreamWriteBufferSize");
aoqi@0:             if (bufSizeStr != null) {
aoqi@0:                 bufSize = Integer.parseInt(bufSizeStr);
aoqi@0:             }
aoqi@0:         } catch (Exception e) {
aoqi@0:             logger.log(Level.INFO, "Error reading com.sun.xml.internal.org.jvnet.staxex.Base64DataStreamWriteBufferSize property", e);
aoqi@0:         }
aoqi@0:         CHUNK_SIZE = bufSize;
aoqi@0:     }
aoqi@0: 
aoqi@0:     public void writeTo(XMLStreamWriter output) throws IOException, XMLStreamException {
aoqi@0:         if (data==null) {
aoqi@0:             try {
aoqi@0:                 InputStream is = dataHandler.getDataSource().getInputStream();
aoqi@0:                 ByteArrayOutputStream outStream = new ByteArrayOutputStream(); // dev-null stream
aoqi@0:                 Base64EncoderStream encWriter = new Base64EncoderStream(output, outStream);
aoqi@0:                 int b;
aoqi@0:                 byte[] buffer = new byte[CHUNK_SIZE];
aoqi@0:                 while ((b = is.read(buffer)) != -1) {
aoqi@0:                     encWriter.write(buffer, 0, b);
aoqi@0:                 }
aoqi@0:                 outStream.close();
aoqi@0:                 encWriter.close();
aoqi@0:             } catch (IOException e) {
aoqi@0:                 dataLen = 0;    // recover by assuming length-0 data
aoqi@0:                 throw e;
aoqi@0:             }
aoqi@0:         } else {
aoqi@0:             // the data is already in memory and not streamed
aoqi@0:             String s = Base64Encoder.print(data, 0, dataLen);
aoqi@0:             output.writeCharacters(s);
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     @Override
aoqi@0:     public Base64Data clone() {
aoqi@0:         try {
aoqi@0:             Base64Data clone = (Base64Data) super.clone();
aoqi@0:             clone.get();
aoqi@0:             if (clone.dataCloneByRef) {
aoqi@0:                 this.data = clone.data;
aoqi@0:             } else {
aoqi@0:                 this.data = new byte[clone.dataLen];
aoqi@0:                 System.arraycopy(clone.data, 0, this.data, 0, clone.dataLen);
aoqi@0:             }
aoqi@0: 
aoqi@0:             this.dataCloneByRef = true;
aoqi@0:             this.dataLen = clone.dataLen;
aoqi@0:             this.dataHandler = null;
aoqi@0:             this.mimeType = clone.mimeType;
aoqi@0:             return clone;
aoqi@0:         } catch (CloneNotSupportedException ex) {
aoqi@0:             Logger.getLogger(Base64Data.class.getName()).log(Level.SEVERE, null, ex);
aoqi@0:             return null;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static String getProperty(final String propName) {
aoqi@0:         if (System.getSecurityManager() == null) {
aoqi@0:             return System.getProperty(propName);
aoqi@0:         } else {
aoqi@0:             return (String) java.security.AccessController.doPrivileged(
aoqi@0:                     new java.security.PrivilegedAction() {
aoqi@0:                         public java.lang.Object run() {
aoqi@0:                             return System.getProperty(propName);
aoqi@0:                         }
aoqi@0:                     });
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0: //    public static void main(String[] args) throws FileNotFoundException, IOException, XMLStreamException {
aoqi@0: //        Base64Data data = new Base64Data();
aoqi@0: //
aoqi@0: //        File f = new File("/Users/snajper/work/builds/weblogic/wls1211_dev.zip");
aoqi@0: //        FileDataSource fds = new FileDataSource(f);
aoqi@0: //        DataHandler dh = new DataHandler(fds);
aoqi@0: //        data.set(dh);
aoqi@0: //
aoqi@0: //        FileWriter fw = new FileWriter(new File("/Users/snajper/Desktop/b.txt"));
aoqi@0: //        XMLStreamWriterImpl wi = new XMLStreamWriterImpl(fw, null);
aoqi@0: //
aoqi@0: //        data.writeTo(wi);
aoqi@0: //        wi.flush();fw.flush();
aoqi@0: //        //System.out.println("SW: " + sw.toString());
aoqi@0: //
aoqi@0: //    }
aoqi@0: 
aoqi@0: }