Examples of org.apache.ojb.broker.metadata.FieldHelper

org.apache.ojb.broker.metadata.FieldHelper
HelperClass for Fields, used for orderBy, groupBy @author Jakob Braeuchi @version $Id: FieldHelper.java,v 1.5.2.1 2005/12/21 22:26:10 tomdz Exp $

    /**
     * Appends to the statement the ORDER BY clause for the Query
     */
    protected void appendOrderByClause(List orderByFields, int[] orderByColumnNumbers, StringBuffer buf)
    {
        FieldHelper cf;


        if (orderByColumnNumbers == null)
        {
            return;
        }

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    /**
     * Appends to the statement the GROUP BY clause for the Query
     */
    protected void appendGroupByClause(List groupByFields, StringBuffer buf)
    {
        FieldHelper cf;


        if (groupByFields == null || groupByFields.size() == 0)
        {
            return;
        }

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     * @param existingColumns the list of column names (String) that are already appended
     * @return the array of column numbers (base 1)
     */
    protected int[] ensureColumns(List columns, List existingColumns, StringBuffer buf)
    {
        FieldHelper cf;
        int[] columnNumbers = new int[columns.size()];


        for (int i = 0; i < columnNumbers.length; i++)
        {
            cf = (FieldHelper) columns.get(i);

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     */
    public void addOrderBy(String fieldName, boolean sortAscending)
    {
        if (fieldName != null)
        {
            _getOrderby().add(new FieldHelper(fieldName, sortAscending));
        }
    }

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     */
    public void addGroupBy(String fieldName)
    {
        if (fieldName != null)
        {
            _getGroupby().add(new FieldHelper(fieldName, false));
        }
    }

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     */
    public void addGroupBy(String fieldName)
    {
        if (fieldName != null)
        {
            m_groupby.add(new FieldHelper(fieldName, false));
        }
    }

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     */
    public void addOrderBy(String fieldName, boolean sortAscending)
    {
        if (fieldName != null)
        {
            m_orderby.add(new FieldHelper(fieldName, sortAscending));
        }
    }

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        Iterator iter = columns.iterator();


        while (iter.hasNext())
        {
            FieldHelper cf = (FieldHelper) iter.next();
            if (!existingColumns.contains(cf.name))
            {
                getAttributeInfo(cf.name, false, null, getQuery().getPathClasses());
            }
        }

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        Iterator iter = columns.iterator();
        int ojb_col = existingColumns.size() + 1;


        while (iter.hasNext())
        {
            FieldHelper cf = (FieldHelper) iter.next();
            if (!existingColumns.contains(cf.name))
            {
                existingColumns.add(cf.name);
                
                buf.append(",");

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        }
        
        buf.append(" ORDER BY ");
        for (int i = 0; i < orderByFields.size(); i++)
        {
            FieldHelper cf = (FieldHelper) orderByFields.get(i);
            int colNumber = selectedFields.indexOf(cf.name);
            
            if (i > 0)
            {
                buf.append(",");

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org.apache.ojb.broker.accesslayer.sql.SqlQueryStatement

org.apache.ojb.broker.query.Criteria

org.apache.ojb.broker.query.QueryByCriteria

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