lok: avoid expensive fetching of a property.

[LibreOffice.git] / include / ucbhelper / content.hxx

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 *
 * 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 .
 */
#ifndef INCLUDED_UCBHELPER_CONTENT_HXX
#define INCLUDED_UCBHELPER_CONTENT_HXX

#include <rtl/ref.hxx>
#include <com/sun/star/uno/Reference.h>
#include <com/sun/star/uno/Sequence.h>
#include <ucbhelper/ucbhelperdllapi.h>

namespace com::sun::star::beans
{
class XPropertySetInfo;
}

namespace com::sun::star::io
{
class XActiveDataSink;
class XOutputStream;
class XInputStream;
class XStream;
}

namespace com::sun::star::sdbc
{
class XResultSet;
class XRow;
}

namespace com::sun::star::ucb
{
class XCommandEnvironment;
class XCommandInfo;
class XContent;
class XDynamicResultSet;
class XAnyCompareFactory;
struct ContentInfo;
struct NumberedSortingInfo;
}

namespace com::sun::star::uno
{
class XComponentContext;
}

namespace com::sun::star::uno
{
class Any;
}

namespace ucbhelper
{
/**
  * These are the possible values for the parameter eMode of method
  * ucbhelper::Content::createCursor.
  */
enum ResultSetInclude
{
    INCLUDE_FOLDERS_ONLY,
    INCLUDE_DOCUMENTS_ONLY,
    INCLUDE_FOLDERS_AND_DOCUMENTS
};

/**
  * These are the possible values for the parameter eOperation of method
  * ucbhelper::Content::insertNewContent.
  */
enum class InsertOperation
{
    Copy, // copy source data
    Move, // move source data
    Checkin // check-in source data
};

class Content_Impl;

/**
  * This class simplifies access to UCB contents by providing a more
  * convenient API for frequently used functionality then the "raw"
  * UCB-API does.
  */
class UCBHELPER_DLLPUBLIC Content final
{
    rtl::Reference<Content_Impl> m_xImpl;

    /// @throws css::ucb::CommandAbortedException
    /// @throws css::uno::RuntimeException,
    /// @throws css::uno::Exception
    css::uno::Any createCursorAny(const css::uno::Sequence<OUString>& rPropertyNames,
                                  ResultSetInclude eMode);

public:
    /**
      * Constructor.
      */
    Content();

    /**
      * Constructor.
      *
      * @param rURL is the URL of the content to create.
      * @param rEnv is the environment to use for commands executed by the
      *        content. The command environment is used by the content
      *        implementation to interact with the client and to propagate
      *        errors.
      * @throws css::ucb::ContentCreationException
      * @throws css::uno::RuntimeException
      */
    Content(const OUString& rURL, const css::uno::Reference<css::ucb::XCommandEnvironment>& rEnv,
            const css::uno::Reference<css::uno::XComponentContext>& rCtx);
    /**
      * Constructor.
      *
      * @param rContent is the content object of the content to create.
      * @param rEnv is the environment to use for commands executed by the
      *        content. The command environment is used by the content
      *        implementation to interact with the client and to propagate
      *        errors.
      * @throws css::ucb::ContentCreationException
      * @throws css::uno::RuntimeException
      */
    Content(const css::uno::Reference<css::ucb::XContent>& rContent,
            const css::uno::Reference<css::ucb::XCommandEnvironment>& rEnv,
            const css::uno::Reference<css::uno::XComponentContext>& rCtx);
    /**
      * Copy Constructor.
      *
      * @param rContent is the content this content shall be a copy of.
      */
    Content(const Content& rOther);

    /**
      * Move constructor.
      */
    Content(Content&& rOther) noexcept;

    /**
      * Destructor.
      */
    ~Content();

    /**
      * Assignment operator.
      *
      * @param rContent is the content this content shall be a copy of.
      */
    Content& operator=(const Content& rOther);

    /**
      * Move assignment operator.
      */
    Content& operator=(Content&& rOther) noexcept;

    /**
      * Constructor. This method should be used, if the exception thrown
      * by the direct ctors of this class are to 'expensive' for your
      * application
      *
      * @param rURL is the URL of the content to create.
      * @param rEnv is the environment to use for commands executed by the
      *        content. The command environment is used by the content
      *        implementation to interact with the client and to propagate
      *        errors.
      * @param rContent will be filled by this method with the content created.
      * @return true, if the operation was successful - false, otherwise.
      */
    static bool create(const OUString& rURL,
                       const css::uno::Reference<css::ucb::XCommandEnvironment>& rEnv,
                       const css::uno::Reference<css::uno::XComponentContext>& rCtx,
                       Content& rContent);

    // Direct access to UCB content.

    /**
      * This method provides access to the "native" UCB content interface(s).
      * This is useful in case the convenience methods provided by this
      * class are insufficient for your needs. You may obtain all interfaces
      * supported by the underlying UCB content by calling this method and
      * after that doing a queryInterface call.
      *
      * @return the XContent interface of the underlying UCB content.
      */
    css::uno::Reference<css::ucb::XContent> get() const;

    // Object identity.

    /**
      * This method returns the URL of the content.
      *
      * @return the URL of the content.
      */
    const OUString& getURL() const;

    // Command environment.

    /**
      * This method returns the environment to use when executing commands.
      *
      * @return the command environment.
      */
    const css::uno::Reference<css::ucb::XCommandEnvironment>& getCommandEnvironment() const;

    /**
      * This method sets a new command environment.
      *
      * @param xNewEnv is the new command environment.
      */
    void setCommandEnvironment(const css::uno::Reference<css::ucb::XCommandEnvironment>& xNewEnv);

    // Access to supported commands/properties.

    /**
      * This methods provides access to meta data of the commands supported
      * by this content.
      *
      * @return an XCommandInfo interface implementation, which can be used
      *         to obtain meta data of the commands supported by this content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::ucb::XCommandInfo> getCommands();
    /**
      * This methods provides access to meta data of the properties supported
      * by this content.
      *
      * @return an XPropertSetInfo interface implementation, which can be used
      *         to obtain meta data of the properties supported by this content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::beans::XPropertySetInfo> getProperties();

    // Access to property value(s).

    /**
      * This method can be used to read a single property value.
      *
      * @param  rPropertyName is the name of the property for that the value
      *         shall be obtained.
      * @return the property value.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Any getPropertyValue(const OUString& rPropertyName);
    /**
      * This method can be used to set a single property value.
      *
      * @param  rPropertyName is the name of the property for that the
      *         value shall be set.
      * @return an any containing:
      *         - No value indicates, that the property value was set
      *           successfully.
      *         - css::beans::UnknownPropertyException indicates,
      *           that the property is not known to the content implementation.
      *         - css::beans::IllegalTypeException indicates, that
      *           the data type of the property value is not acceptable.
      *         - css::lang::IllegalAccessException indicates, that
      *           the property is constant.
      *         - css::lang::IllegalArgumentException indicates,
      *           that the property value is not acceptable. For instance,
      *           setting an empty title may be illegal.
      *         - Any other exception derived from
      *           css::uno::Exception indicates, that the value was
      *           not set successfully. For example, this can be a
      *           com::sun:star::ucb::InteractiveAugmentedIOException
      *           transporting the error code
      *           css::ucb::IOErrorCode::ACCESS_DENIED.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Any setPropertyValue(const OUString& rPropertyName, const css::uno::Any& rValue);
    /**
      * This method can be used to read multiple property values.
      *
      * @param  rPropertyNames is a sequence of names of properties for
      *         that the values shall be obtained.
      * @return the property values.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Sequence<css::uno::Any>
    getPropertyValues(const css::uno::Sequence<OUString>& rPropertyNames);
    /**
      * This method can be used to read multiple property values.
      *
      * @param  rPropertyNames is a sequence of names of properties for
      *         that the values shall be obtained.
      * @return the property values.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::sdbc::XRow>
    getPropertyValuesInterface(const css::uno::Sequence<OUString>& rPropertyNames);

    /**
      * This method can be used to set multiple property values.
      *
      * @param  rPropertyNames is a sequence of names of properties for
      *         that values shall be set.
      * @return a sequence of any's which has exactly the same number
      *         of elements as the number of properties to set. Every
      *         sequence element contains the status for a property. The
      *         first sequence elements corresponds to the first element in
      *         the sequence of property names and so on.
      *
      *         An any containing:
      *         - No value indicates, that the property value was set
      *           successfully.
      *         - css::beans::UnknownPropertyException indicates,
      *           that the property is not known to the content implementation.
      *         - css::beans::IllegalTypeException indicates, that
      *           the data type of the property value is not acceptable.
      *         - css::lang::IllegalAccessException indicates, that
      *           the property is constant.
      *         - css::lang::IllegalArgumentException indicates,
      *           that the property value is not acceptable. For instance,
      *           setting an empty title may be illegal.
      *         - Any other exception derived from
      *           css::uno::Exception indicates, that the value was
      *           not set successfully. For example, this can be a
      *           com::sun:star::ucb::InteractiveAugmentedIOException
      *           transporting the error code
      *           css::ucb::IOErrorCode::ACCESS_DENIED.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Sequence<css::uno::Any>
    setPropertyValues(const css::uno::Sequence<OUString>& rPropertyNames,
                      const css::uno::Sequence<css::uno::Any>& rValues);

    // General command execution.

    /**
      * This method can be used to execute any command supported by the
      * content.
      *
      * @param  rCommandName is the name of the command to execute.
      * @param  rCommandArgument is the argument for the command. Type and
      *         values of this parameter must correspond to the command
      *         specification.
      * @return the result of the command according to its specification.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Any executeCommand(const OUString& rCommandName,
                                 const css::uno::Any& rCommandArgument);

    // Special commands.

    /**
      * This methods gives access to the children of a folder content.
      * Additionally, the result set returned provides efficient access to
      * preselected property values of the children.
      * Internally it executes the command "open" at the content.
      *
      * @param  rPropertyNames is a sequence of names of properties for
      *         that the values should be accessible via the resultset
      *         returned by this method.
      * @param  eMode is a very simple filter for the children contained
      *         in the resultset.
      * @return an implementation of the service
      *         com.cun.star.ucb.ContentResultSet, which can be used to
      *         get access to the children of a content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::sdbc::XResultSet>
    createCursor(const css::uno::Sequence<OUString>& rPropertyNames,
                 ResultSetInclude eMode = INCLUDE_FOLDERS_AND_DOCUMENTS);
    /**
      * This methods gives access to the children of a folder content.
      * Additionally, the result set returned provides efficient access to
      * preselected property values of the children.
      * Internally it executes the command "open" at the content.
      *
      * @param rPropertyNames is a sequence of names of properties for
      *        that the values should be accessible via the resultset
      *        returned by this method.
      * @param eMode is a very simple filter for the children contained
      *        in the resultset.
      * @return an implementation of the service
      *         com.cun.star.ucb.DynamicResultSet, which can be used to
      *         get access to the children of a content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::ucb::XDynamicResultSet>
    createDynamicCursor(const css::uno::Sequence<OUString>& rPropertyNames,
                        ResultSetInclude eMode = INCLUDE_FOLDERS_AND_DOCUMENTS);

    /// @throws css::ucb::CommandAbortedException
    /// @throws css::uno::RuntimeException
    /// @throws css::uno::Exception
    css::uno::Reference<css::sdbc::XResultSet>
    createSortedCursor(const css::uno::Sequence<OUString>& rPropertyNames,
                       const css::uno::Sequence<css::ucb::NumberedSortingInfo>& rSortInfo,
                       const css::uno::Reference<css::ucb::XAnyCompareFactory>& rAnyCompareFactory,
                       ResultSetInclude eMode = INCLUDE_FOLDERS_AND_DOCUMENTS);

    /**
      * This methods gives read access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      *
      * @return an implementation of the interface XInputStream, which can
      *         be used to read the content's data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::io::XInputStream> openStream();
    /**
      * This methods gives read access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      * The method requests opening without locking.
      *
      * @return an implementation of the interface XInputStream, which can
      *         be used to read the content's data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::io::XInputStream> openStreamNoLock();

    /**
      * This methods gives read/write access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      *
      * @return an implementation of the interface XStream, which can
      *         be used to read/write the content's data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::io::XStream> openWriteableStream();
    /**
      * This methods gives read/write access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      * The method requests opening without locking.
      *
      * @return an implementation of the interface XStream, which can
      *         be used to read/write the content's data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Reference<css::io::XStream> openWriteableStreamNoLock();

    /**
      * This methods gives read access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      *
      * @param rSink is the implementation of an XActiveDataSink interface,
      *        which shall be used by the content to deliver the data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool openStream(const css::uno::Reference<css::io::XActiveDataSink>& rSink);
    /**
      * This methods gives read access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "open" at the content.
      *
      * @param rStream is the implementation of an XOutputStream interface,
      *        which shall be used by the content to deliver the data.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool openStream(const css::uno::Reference<css::io::XOutputStream>& rStream);
    /**
      * This methods gives write access to the content stream of a content (i.e
      * the content of a file located at the local file system).
      * Internally it executes the command "insert" at the content.
      *
      * @param rStream is the implementation of an XInputStream interface,
      *        which contains the content data to write.
      * @param bReplaceExisting specifies, whether any existing content data
      *        shall be overwritten.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    void writeStream(const css::uno::Reference<css::io::XInputStream>& rStream,
                     bool bReplaceExisting);

    /**
      * This method returns the different types of contents this content
      * can create.
      *
      * @return the content types or an empty sequence if no contents can be
      *         created by this content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    css::uno::Sequence<css::ucb::ContentInfo> queryCreatableContentsInfo();

    /**
      * This method creates, initializes and inserts ( commits ) a new content
      * (i.e. it could be used to create a new file system folder).
      * Internally this method does a
      * XCommandProcessor::execute( "createNewContent", ... );
      * XCommandProcessor::execute( "setPropertyValues", ... );
      * XCommandProcessor::execute( "insert", ... ); calling sequence.
      *
      * @param rContentType is the type for the new UCB content. Each content
      *        provider implementation may introduce own types for its content
      *        objects (See queryCreatableContentsInfo()).
      * @param rPropertyNames is a sequence of names of properties for that
      *        values are to set at the new content before it will be inserted
      *        ( committed ).
      *        The order of the names must correspond to the order of the
      *        property values.
      * @param rPropertyValues is a sequence of property values that are to
      *        set at the new content before it will be inserted ( committed ).
      *        The order of the values must correspond to the order of the
      *        property names.
      * @param rNewContent will be filled by the implementation of this method
      *        with the new content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool insertNewContent(const OUString& rContentType,
                          const css::uno::Sequence<OUString>& rPropertyNames,
                          const css::uno::Sequence<css::uno::Any>& rPropertyValues,
                          Content& rNewContent);
    /**
      * This method creates, initializes and inserts (commits) a new content
      * inside this (the target folder) content. For example, it can be used to
      * create a new file system file.
      * Internally this method does a
      * XCommandProcessor::execute( "createNewContent", ... );
      * XCommandProcessor::execute( "setPropertyValues", ... );
      * XCommandProcessor::execute( "insert", ... ); calling sequence.
      *
      * @param rContentType is the type for the new UCB content. Each content
      *        provider implementation may introduce own types for its content
      *        objects (See queryCreatableContentsInfo()).
      * @param rPropertyNames is a sequence of names of properties for that
      *        values are to set at the new content before it will be inserted
      *        ( committed ).
      *        The order of the names must correspond to the order of the
      *        property values.
      * @param rPropertyValues is a sequence of property values that are to
      *        set at the new content before it will be inserted ( committed ).
      *        The order of the values must correspond to the order of the
      *        property names.
      * @param rStream is a stream containing the content data for the new
      *        content (i.e. the content of a file to create)
      * @param rNewContent will be filled by the implementation of this method
      *        with the new content.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool insertNewContent(const OUString& rContentType,
                          const css::uno::Sequence<OUString>& rPropertyNames,
                          const css::uno::Sequence<css::uno::Any>& rPropertyValues,
                          const css::uno::Reference<css::io::XInputStream>& rStream,
                          Content& rNewContent);

    /**
      * This method transfers (copies/moves) a content. It creates a new
      * resource inside this (the target folder) content.
      * The implementation is able to do cross-provider transfers (like copying
      * a file from the local file system to a directory located on an HTTP
      * server).
      * Internally this method executes the command "globalTransfer" at the UCB.
      *
      * @param rSourceContent is the content that contains the data for the
      *        new UCB content.
      * @param eOperation defines what shall be done with the source data
      *        ( COPY, MOVE, LINK ).
      * @param rTitle contains a title for the new content. If this is an empty
      *        string, the new content will have the same title as the source
      *        content.
      * @param rNameClashAction describes how the implementation shall behave
      *        in case a content with a clashing name exists in the target
      *        folder.
      *        NameClash::ERROR will abort the operation, NameClash::OVERWRITE
      *        will overwrite the clashing content and all its data,
      *        NameClash::RENAME will generate and supply a non-clashing title.
      *        @see com/sun/star/ucb/NameClash.idl
      * @param rMimeType contains the MIME type of the document to write.
      * @param bMajorVersion tells to create a new major version for checkin operations
      * @param rCommentVersion contains the comment to use for checkin operations
      * @param rResultURL is a hacky way to get the update URL after the operation in
      *        case there was a change (introduced for the checkin operation)
      * @param rDocumentId is the document Id ( in case of CMIS ).
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    void transferContent(const Content& rSourceContent, InsertOperation eOperation,
                         const OUString& rTitle, const sal_Int32 nNameClashAction,
                         const OUString& rMimeType = OUString(), bool bMajorVersion = false,
                         const OUString& rCommentVersion = OUString(),
                         OUString* pResultURL = nullptr,
                         const OUString& rDocumentId = OUString()) const;

    /**
      *  This method lock the resource.
      *
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    void lock();

    /**
      * This method unlock the resource.
      *
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    void unlock();

    // Required properties.

    /**
      * This method returns the value of the content's property "IsFolder".
      *
      * @return true, if the content is a folder ( it can contain other
      *         UCB contents). false, otherwise.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool isFolder();
    /**
      * This method returns the value of the content's property "IsDocument".
      *
      * @return true, if the content is a document ( it has a content stream ).
      *         false, otherwise.
      * @throws css::ucb::CommandAbortedException
      * @throws css::uno::RuntimeException
      * @throws css::uno::Exception
      */
    bool isDocument();
};

} /* namespace ucbhelper */

#endif /* ! INCLUDED_UCBHELPER_CONTENT_HXX */

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