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/*************************************************************************
*
* The Contents of this file are made available subject to the terms of
* the BSD license.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Sun Microsystems, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*************************************************************************/
package FilterDevelopment.AsciiFilter;
import com.sun.star.uno.AnyConverter;
import com.sun.star.uno.XComponentContext;
import com.sun.star.lang.XMultiComponentFactory;
import com.sun.star.uno.UnoRuntime;
/*-************************************************************************
@title helper to analyze necessary option properties of our filter
@description Our filter needs some necessary properties for working:
- a stream for input or output
- or an URL for creating such streams
- information about required action on filtering
@attention This class mustn't be threadsafe - because instances of it
are used temp. only - not as members. So no concurrent access
should occur.
Another reason: It wuold be very difficult to safe every
access on our internal member. To do so - we must implement
special methods instead of allowing pure member access.
************************************************************************-*/
public class FilterOptions
{
// public member to provide these options to our outside filter class
public com.sun.star.io.XInputStream m_xInput ;
public com.sun.star.io.XOutputStream m_xOutput ;
public boolean m_bStreamOwner ;
private String m_sURL ;
public String m_sOld ;
public String m_sNew ;
public boolean m_bCaseChange ;
public boolean m_bLower ;
// private members for internal things
private XMultiComponentFactory m_xMCF ;
private XComponentContext m_Ctx ;
// interface
/**
* creates a new instance of this class
* It use the given MediaDescriptor to find right
* properties for initialization of the internal members.
* To do so it use another interface method analyze()
* which can be used after creation of an object instance
* to set a new descriptor here.
*
* @param xMCF
* we need it to create special help service top open
* streams in case they are not already a part of given
* MediaDescriptor
*
* @param bImport
* we must know which stream member should be valid initialized
*
* @param lDescriptor
* the initial MediaDescriptor to set internal member from it
*/
public FilterOptions( XMultiComponentFactory xMCF ,
XComponentContext Context ,
boolean bImport ,
com.sun.star.beans.PropertyValue[] lDescriptor )
{
m_xMCF = xMCF;
m_Ctx = Context;
analyze(bImport, lDescriptor);
}
/**
* analyze given MediaDescriptor to find values for our internal member
* It reset all members to defaults before - to prevent us against
* mixed descriptor values!
*
* @param bImport
* we must know which stream member should be valid initialized
*
* @param lDescriptor
* the new MediaDescriptor to set internal member from it
*/
private void analyze( boolean bImport ,
com.sun.star.beans.PropertyValue[] lDescriptor )
{
m_xInput = null ;
m_xOutput = null ;
m_bStreamOwner = false ;
m_sURL = null ;
m_sOld = "";
m_sNew = "";
m_bCaseChange = false ;
m_bLower = false ;
for ( int i=0; i<lDescriptor.length; ++i )
{
try
{
if (lDescriptor[i].Name.equals("FileName"))
m_sURL = AnyConverter.toString(lDescriptor[i].Value);
else
if (lDescriptor[i].Name.equals("InputStream"))
m_xInput = (com.sun.star.io.XInputStream)AnyConverter.toObject(new com.sun.star.uno.Type(com.sun.star.io.XInputStream.class), lDescriptor[i].Value);
else
if (lDescriptor[i].Name.equals("OutputStream"))
m_xOutput = (com.sun.star.io.XOutputStream)AnyConverter.toObject(new com.sun.star.uno.Type(com.sun.star.io.XOutputStream.class), lDescriptor[i].Value);
else
if (lDescriptor[i].Name.equals("FilterData"))
{
com.sun.star.beans.PropertyValue[] lFilterProps = (com.sun.star.beans.PropertyValue[])AnyConverter.toArray(lDescriptor[i].Value);
int nCount = lFilterProps.length;
for (int p=0; p<nCount; ++p)
{
if (lFilterProps[p].Name.equals("OldString"))
m_sOld = AnyConverter.toString(lFilterProps[p].Value);
else
if (lFilterProps[p].Name.equals("NewString"))
m_sNew = AnyConverter.toString(lFilterProps[p].Value);
else
if (lFilterProps[p].Name.equals("LowerCase"))
{
m_bLower = AnyConverter.toBoolean(lFilterProps[p].Value);
m_bCaseChange = true; // Set it after m_bLower - because an exception can occur and we must use default values then!
}
}
}
}
catch(com.sun.star.lang.IllegalArgumentException exConvert)
{
// ONE argument has the wrong type
// But I think we mustn't react here - because we setted
// default values for every necessary item we need.
// In case this exception occurs - this default exist
// and we can live with it.
}
}
// Decide if it's necessary AND possible to open streams.
// Outside user can check for valid FilterOptions by using
// corresponding method isValid(). So it's not necessary to
// handle this error here in any case.
if (m_xInput==null && m_xOutput==null && m_sURL!=null)
impl_openStreams(bImport);
}
/**
* with this method it's possible for the outside filter to decide
* if he can use this FilterOptions really or not.
* That means especially if necessary streams are available or not.
*/
public boolean isValid()
{
return(m_xInput!=null || m_xOutput!=null);
}
// helper
/**
* In case we couldn't found any valid stream inside the given MediaDescriptor,
* we must create it. Then we use a special helper service in combination
* with an existing URL to open a stream for reading or writing. It depends
* from given parameter bImport.
*
* Note: This method doesn't check for a valid URL. It must be done before.
*
* @param bImport
* indicates which stream member must be valid as result of this call
*/
private void impl_openStreams( boolean bImport )
{
try{
com.sun.star.ucb.XSimpleFileAccess xHelper = UnoRuntime.queryInterface(
com.sun.star.ucb.XSimpleFileAccess.class,
m_xMCF.createInstanceWithContext("com.sun.star.ucb.SimpleFileAccess", m_Ctx));
if (xHelper!=null)
{
if (bImport)
m_xInput = xHelper.openFileRead(m_sURL);
else
m_xOutput = xHelper.openFileWrite(m_sURL);
}
m_bStreamOwner = (m_xInput!=null || m_xOutput!=null);
}
catch(com.sun.star.ucb.CommandAbortedException exAborted) {}
catch(com.sun.star.uno.Exception exUno ) {}
}
}
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