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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
package org.openoffice.xmerge;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import org.openoffice.xmerge.util.registry.ConverterInfo;
/**
* The {@code Convert} class manages a conversion from one mime-type to another.
*
* <p>The {@code ConvertFactory} is responsible for returning the appropriate
* {@code Convert} class for a specified conversion. This class is responsible
* for all interactions with the {@code PluginFactory} implementation.</p>
*
* @see ConverterFactory
* @see PluginFactory
* @see org.openoffice.xmerge.util.registry.ConverterInfo
*/
public class Convert implements Cloneable {
/** ConvertInfo that corresponds to the from-mime/to-mime conversion. */
private final ConverterInfo ci;
/**
* {@code true} if converting to the Office format, {@code false} if
* converting to the device format.
*/
private final boolean toOffice;
/** Holds the convert input data. */
private final ConvertData inputCD = new ConvertData();
/**
* Construct a Convert class with specified {@code ConvertInfo} registry
* information.
*
* @param ci A {@code ConvertInfo} object containing registry
* information corresponding to a specific plug-in.
* @param toOffice {@code true} if converting to the Office format,
* {@code false} if converting to the device format.
*/
public Convert(ConverterInfo ci, boolean toOffice) {
this.ci = ci;
this.toOffice = toOffice;
}
/**
* Adds an {@code InputStream} to be used as input by the {@code Convert}
* class.
*
* <p>It is possible that many files need to be converted into a single
* output {@code Document}, so this function may be called more than one
* time. It is the plug-in's responsibility to know how to handle the input.
* </p>
*
* @param name The name corresponding to the {@code InputStream}.
* @param is {@code InputStream} to be used as input.
*
* @throws IOException If any I/O error occurs.
*/
public void addInputStream(String name, InputStream is)
throws IOException {
Document inputDoc;
if (toOffice) {
inputDoc = ci.getPluginFactory().createDeviceDocument(name, is);
} else {
inputDoc = ci.getPluginFactory().createOfficeDocument(name, is);
}
inputCD.addDocument(inputDoc);
}
/**
* Adds an {@code InputStream} to be used as input by the {@code Convert}
* class.
*
* <p>It is possible that many files need to be converted into a single
* output {@code Document}, so this function may be called more than one
* time. It is the plug-in's responsibility to know how to handle the input.
* </p>
*
* @param name The name corresponding to the {@code InputStream}.
* @param is {@code InputStream} to be used as input.
* @param isZip {@code boolean} to identify that incoming stream is * zipped.
*
* @throws IOException If any I/O error occurs.
*/
public void addInputStream(String name, InputStream is,boolean isZip)
throws IOException {
Document inputDoc;
if (toOffice) {
inputDoc = ci.getPluginFactory().createDeviceDocument(name, is);
} else {
inputDoc = ci.getPluginFactory().createOfficeDocument(name, is, isZip);
}
inputCD.addDocument(inputDoc);
}
/**
* Returns a {@code DocumentMerger} for the given {@code Document}.
*
* @param origDoc The {@code Document} were later changes will be merged to.
*
* @return The {@code DocumentMerger} object for the given document.
*
* @throws IOException If any I/O error occurs.
*/
public DocumentMerger getDocumentMerger(Document origDoc) throws IOException {
DocumentMergerFactory myDocMergerFactory = ci.getDocMergerFactory();
DocumentMerger merger = myDocMergerFactory.createDocumentMerger(origDoc);
return merger;
}
/**
* Resets the input queue, so that the user can use this class to perform
* another conversion.
*
* <p>This causes the {@code addInputStream} method to accept input for the
* next conversion.</p>
*/
private void reset() {
inputCD.reset();
}
/**
* Clones a {@code Convert} object so another Convert object can do the same
* conversion.
*
* <p>{@code InputStream} objects passed in via calls to the
* {@code addInputStream} method are not copied.</p>
*
* @return The cloned {@code Convert} object.
*/
@Override
public Object clone() {
Convert aClone = null;
try {
aClone = (Convert) super.clone();
aClone.reset();
}
catch (CloneNotSupportedException e) {
System.out.println("Convert clone could not be created");
}
return aClone;
}
/**
* Convert the input specified in calls to the {@code addInputStream}
* method to the output format specified by this {@code Convert} class.
*
* @return The output data.
*
* @throws ConvertException If any conversion error occurs.
* @throws IOException If any I/O error occurs.
*/
public ConvertData convert() throws ConvertException, IOException {
ConvertData dataOut = new ConvertData();
if (toOffice) {
// From device format to Office format
DocumentDeserializerFactory myDocDeserializerFactory =
ci.getDocDeserializerFactory();
DocumentDeserializer deser =
myDocDeserializerFactory.createDocumentDeserializer(inputCD);
Document deviceDoc = deser.deserialize();
dataOut.addDocument(deviceDoc);
return dataOut;
} else {
// From Office format to device format
DocumentSerializerFactory myDocSerializerFactory =
ci.getDocSerializerFactory();
Iterator<Object> e = inputCD.getDocumentEnumeration();
Document doc = (Document) e.next();
DocumentSerializer ser = myDocSerializerFactory.createDocumentSerializer(doc);
dataOut = ser.serialize();
return dataOut;
}
}
/**
* Returns the appropriate "Office" {@code Document} object for
* this plug-in.
*
* @param name The name of the {@code Document} to create.
* @param is The {@code InputStream} corresponding to the
* {@code Document} to create.
*
* @return The appropriate "Office" {@code Document} object for
* this plug-in.
*
* @throws IOException If any I/O error occurs.
*/
public Document getOfficeDocument(String name, InputStream is)
throws IOException {
return ci.getPluginFactory().createOfficeDocument(name, is);
}
}
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