Package org.guvnor.inbox.backend.server

Source Code of org.guvnor.inbox.backend.server.InboxPageRowBuilder

/*
* Copyright 2011 JBoss Inc
*
* Licensed 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.
*/
package org.guvnor.inbox.backend.server;

import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import javax.inject.Inject;
import javax.inject.Named;

import org.guvnor.inbox.model.InboxIncomingPageRow;
import org.guvnor.inbox.model.InboxPageRequest;
import org.guvnor.inbox.model.InboxPageRow;
import org.uberfire.backend.server.util.Paths;
import org.uberfire.backend.vfs.Path;
import org.uberfire.io.IOService;
import org.uberfire.security.Identity;

public class InboxPageRowBuilder
        implements
        PageRowBuilder<InboxPageRequest, Iterator<InboxEntry>> {

    @Inject
    @Named("ioStrategy")
    private IOService ioService;

    private InboxPageRequest pageRequest;
    private Iterator<InboxEntry> iterator;
    private Identity identity;

    public List<InboxPageRow> build() {
        validate();
        int skipped = 0;
        Integer pageSize = pageRequest.getPageSize();
        int startRowIndex = pageRequest.getStartRowIndex();
        List<InboxPageRow> rowList = new ArrayList<InboxPageRow>();
        while ( iterator.hasNext() && ( pageSize == null || rowList.size() < pageSize ) ) {
            InboxEntry ie = iterator.next();

            if ( skipped >= startRowIndex ) {
                rowList.add( createInboxPageRow( ie,
                                                 pageRequest ) );
            }
            skipped++;
        }
        return rowList;
    }

    private InboxPageRow createInboxPageRow( InboxEntry inboxEntry,
                                             InboxPageRequest request ) {
        InboxPageRow row = null;
        if ( request.getInboxName().equals( InboxServiceImpl.INCOMING_ID ) ) {
            InboxIncomingPageRow tr = new InboxIncomingPageRow();
            tr.setNote( inboxEntry.getNote() );
            tr.setPath( makePath( inboxEntry.getItemPath() ) );
            tr.setTimestamp( new Date( inboxEntry.getTimestamp() ) );
            tr.setFrom( inboxEntry.getFrom() );
            row = tr;

        } else {
            InboxPageRow tr = new InboxPageRow();
            tr.setNote( inboxEntry.getNote() );
            tr.setPath( makePath( inboxEntry.getItemPath() ) );
            tr.setTimestamp( new Date( inboxEntry.getTimestamp() ) );
            row = tr;
        }
        return row;
    }

    private Path makePath( final String fullPath ) {
        try {
            final org.uberfire.java.nio.file.Path path = ioService.get( new URI( fullPath ) );
            return Paths.convert( path );

        } catch ( URISyntaxException e ) {
            return null;
        }
    }

    public void validate() {
        if ( pageRequest == null ) {
            throw new IllegalArgumentException( "PageRequest cannot be null" );
        }

        if ( iterator == null ) {
            throw new IllegalArgumentException( "Content cannot be null" );
        }

    }

    public InboxPageRowBuilder withPageRequest( InboxPageRequest pageRequest ) {
        this.pageRequest = pageRequest;
        return this;
    }

    public InboxPageRowBuilder withIdentity( Identity identity ) {
        this.identity = identity;
        return this;
    }

    public InboxPageRowBuilder withContent( Iterator<InboxEntry> iterator ) {
        this.iterator = iterator;
        return this;
    }

}
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