package org.alfresco.util.schemacomp;

import java.util.List;

import org.alfresco.util.schemacomp.model.DbObject;
import org.springframework.extensions.surf.util.I18NUtil;

/**
 * If more than one DB item in the target schema matches a reference DB item
 * then this result will be issued.
 * 
 * @author Matt Ward
 */
public class RedundantDbObject extends Result
{
    private final static int SHOW_MAX_MATCHES = 3;
    private DbObject dbObject;
    private List<DbObject> matches;
    
    public RedundantDbObject(DbObject dbObject, List<DbObject> matches)
    {
        this.dbObject = dbObject;
        this.matches = matches;
    }

    @Override
    public String describe()
    {
        if (matches.size() > SHOW_MAX_MATCHES)
        {
            return I18NUtil.getMessage(
                        "system.schema_comp.redundant_obj.many_matches",
                        matches.size(),
                        dbObject,
                        describeMatches(),
                        matches.size() - SHOW_MAX_MATCHES);            
        }
        else
        {
            return I18NUtil.getMessage(
                        "system.schema_comp.redundant_obj",
                        matches.size(),
                        dbObject,
                        describeMatches());
        }
    }

    /**
     * Produces a comma separated list of matching redundant database objects. For example:
     * <pre>
     *    MyDbObject[name=match1], MyDbObject[name=match2], MyDbObject[name=match3]
     * </pre>
     * At most {@link #SHOW_MAX_MATCHES} will be included.
     * 
     * @return String
     */
    private String describeMatches()
    {
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < matches.size() && i < SHOW_MAX_MATCHES; i++)
        {
            if (i > 0)
            {
                sb.append(", ");
            }
            sb.append(matches.get(i));
        }
        return sb.toString();
    }

    @Override
    public String toString()
    {
        return "RedundantDbObject [dbObject=" + this.dbObject + ", matches=" + this.matches + "]";
    }
}