/**************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
import com.sun.star.ucb.OpenCommandArgument2;
import com.sun.star.ucb.OpenMode;
import com.sun.star.ucb.XContent;
import com.sun.star.io.XActiveDataSink;
import com.sun.star.io.XInputStream;
/**
* Accessing (Loading) the Content Data Stream of a UCB Document Content
*/
public class DataStreamRetriever {
/**
* Member properties
*/
private Helper m_helper;
private XContent m_content;
private String m_contenturl = "";
/**
* Constructor.
*
*@param String[] This construtor requires the arguments:
* -url=... (optional)
* See Help (method printCmdLineUsage()).
* Without the arguments a new connection to a
* running office cannot created.
*@exception java.lang.Exception
*/
public DataStreamRetriever( String args[] ) throws java.lang.Exception {
// Parse arguments
parseArguments( args );
// Init
m_helper = new Helper( getContentURL() );
// Create UCB content
m_content = m_helper.createUCBContent();
}
/**
* Read the document data stream of a document content using a
* XActiveDataSink implementation as data sink....
*
*@return XInputStream Returns input stream if stream successfully retrieved,
* null otherwise
*@exception com.sun.star.ucb.CommandAbortedException
*@exception com.sun.star.uno.Exception
*/
public XInputStream getDataStream()
throws com.sun.star.ucb.CommandAbortedException, com.sun.star.uno.Exception {
XInputStream data = null;
if ( m_content != null ) {
// Fill argument structure...
OpenCommandArgument2 arg = new OpenCommandArgument2();
arg.Mode = OpenMode.DOCUMENT;
arg.Priority = 32768; // Final static for 32768
// Create data sink implementation object.
XActiveDataSink dataSink = new MyActiveDataSink();
arg.Sink = dataSink;
// Execute command "open". The implementation of the command will
// supply an XInputStream implementation to the data sink.
m_helper.executeCommand( m_content, "open", arg );
// Get input stream supplied by the open command implementation.
data = dataSink.getInputStream();
}
return data;
}
/**
* Get connect URL.
*
*@return String That contains the connect URL
*/
public String getContentURL() {
return m_contenturl;
}
/**
* Parse arguments
*
*@param String[] Arguments
*@exception java.lang.Exception
*/
public void parseArguments( String[] args ) throws java.lang.Exception {
for ( int i = 0; i < args.length; i++ ) {
if ( args[i].startsWith( "-url=" )) {
m_contenturl = args[i].substring( 5 );
} else if ( args[i].startsWith( "-help" ) ||
args[i].startsWith( "-?" )) {
printCmdLineUsage();
System.exit( 0 );
}
}
if ( m_contenturl == null || m_contenturl.equals( "" )) {
m_contenturl = Helper.prependCurrentDirAsAbsoluteFileURL( "data/data.txt" );
}
}
/**
* Print the commands options
*/
public void printCmdLineUsage() {
System.out.println(
"Usage : DataStreamRetriever -url=..." );
System.out.println(
"Defaults: -url=<currentdir>/data/data.txt" );
System.out.println(
"\nExample : -url=file:///temp/my.txt" );
}
/**
* Print Stream content.
*
*@param XInputStream
*@exception com.sun.star.uno.Exception
*/
public void printStream( XInputStream data )
throws com.sun.star.uno.Exception {
/////////////////////////////////////////////////////////////////////
// Read data from input stream...65536
/////////////////////////////////////////////////////////////////////
// Data buffer. Will be allocated by input stream implementation!
byte[][] buffer = new byte[ 1 ][ 65536 ];
int read = data.readSomeBytes( buffer, 65536 );
System.out.println( "Read bytes : " + read );
System.out.println( "Read data (only first 64K displayed): ");
while ( read > 0 ) {
byte[] bytes = new byte[ read ];
for( int i = 0; i < read; i++ ) {
bytes[ i ] = buffer[ 0 ][ i ];
}
System.out.println( new String(bytes) );
// Process data contained in buffer.
read = data.readSomeBytes( buffer, 65536 );
}
}
/**
* Create a new connection with the specific args to a running office and
* access (Load) the content data stream of a UCB document content.
*
*@param String[] Arguments
*/
public static void main ( String args[] ) {
System.out.println( "\n" );
System.out.println(
"-----------------------------------------------------------------------" );
System.out.println(
"DataStreamRetriever - obtains the data stream from a document resource." );
System.out.println(
"-----------------------------------------------------------------------" );
try {
DataStreamRetriever access = new DataStreamRetriever( args );
XInputStream data = access.getDataStream();
String url = access.getContentURL();
if ( data != null ) {
String tempPrint = "\nGetting data stream for resource " + url +
" succeeded.";
int size = tempPrint.length();
System.out.println( tempPrint );
tempPrint = "";
for( int i = 0; i < size; i++ ) {
tempPrint += "-";
}
System.out.println( tempPrint );
access.printStream( data );
} else {
System.out.println(
"Getting data stream for resource " + url + " failed." );
}
} catch ( com.sun.star.io.NotConnectedException e ) {
System.out.println( "Error: " + e );
} catch ( com.sun.star.io.BufferSizeExceededException e ) {
System.out.println( "Error: " + e );
} catch ( com.sun.star.io.IOException e ) {
System.out.println( "Error: " + e );
} catch ( com.sun.star.ucb.CommandAbortedException e ) {
System.out.println( "Error: " + e );
} catch ( com.sun.star.uno.Exception e ) {
System.out.println( "Error: " + e );
} catch ( java.lang.Exception e ) {
System.out.println( "Error: " + e );
}
System.exit( 0 );
}
}