Update to new java-libglom API.

[online-glom:gwt-glom.git] / src / org / glom / web / server / TableNamesServiceImpl.java

package org.glom.web.server;

import java.io.File;

import org.glom.libglom.Document;
import org.glom.libglom.Glom;
import org.glom.libglom.StringVector;
import org.glom.web.client.GlomTable;
import org.glom.web.client.TableNameService;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;

@SuppressWarnings("serial")
public class TableNamesServiceImpl extends RemoteServiceServlet implements
                TableNameService {
        private Document document;
        
        public TableNamesServiceImpl() {
                Glom.libglom_init();
                // FIXME Need to call Glom.libglom_deinit()
                document = new Document();
                document.set_file_uri("file://" + Glom.GLOM_EXAMPLE_FILE_DIR +  File.separator + "example_music_collection.glom");
                int error = 0;
                @SuppressWarnings("unused")
                boolean retval = document.load(error);
                // FIXME handle error condition
        }

        @Override
        public GlomTable[] getNames() {
                StringVector names = document.get_table_names();
                int tableSize = safeLongToInt(names.size());
                GlomTable[] tableNames = new GlomTable[tableSize];
                for (int i = 0; i < tableSize; i++) {
                        tableNames[i] = new GlomTable(names.get(i));
                }
                return tableNames;
        }
        
        // FIXME I think Swig is generating long on 64-bit machines and int on 32-bit machines - need to keep this constant
        // From http://stackoverflow.com/questions/1590831/safely-casting-long-to-int-in-java
        public static int safeLongToInt(long l) {
            if (l < Integer.MIN_VALUE || l > Integer.MAX_VALUE) {
                throw new IllegalArgumentException
                    (l + " cannot be cast to int without changing its value.");
            }
            return (int) l;
        }


}