[Squirrel-sql-commits] sql12/app/src/net/sourceforge/squirrel_sql/client/session/parser/kernel/completions ErrorListener.java,NONE,1.1 SQLColumn.java,NONE,1.1 SQLModifyingStatement.java,NONE,1.1 SQLSelectStatement.java,NONE,1.1 SQLSelectStatementListener.java,NONE,1.1 SQLStatement.java,NONE,1.1 SQLStatementContext.java,NONE,1.1 SQLTable.java,NONE,1.1 SQLWhere.java,NONE,1.1

[Colin B. <co...@us...>]

Update of /cvsroot/squirrel-sql/sql12/app/src/net/sourceforge/squirrel_sql/client/session/parser/kernel/completions
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv31947/app/src/net/sourceforge/squirrel_sql/client/session/parser/kernel/completions

Added Files:
	ErrorListener.java SQLColumn.java SQLModifyingStatement.java 
	SQLSelectStatement.java SQLSelectStatementListener.java 
	SQLStatement.java SQLStatementContext.java SQLTable.java 
	SQLWhere.java 
Log Message:
Gerd Wagners patch - adds SQL parser

--- NEW FILE: SQLModifyingStatement.java ---
/*
 * net.sourceforge.squirrel_sql.client.session.parser.kernel.completions.SQLModifyingStatement
 * 
 * created by cse, 11.10.2002 17:14:06
 *
 * Copyright (c) 2002 DynaBEAN Consulting, all rights reserved
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.Completion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.ParserLogger;

import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;


/**
 * an SQL statement class representing modyfing statements, i.e.
 * INSERT, UPDATE and DELETE. The important common trait of these statements
 * is that they alow for only one target table to be specified
 */
public class SQLModifyingStatement extends SQLStatement
{
    private SQLTable m_table;
    private int updateListStart = NO_POSITION;
    private int updateListEnd = NO_POSITION;

    public SQLModifyingStatement(int start)
    {
        super(start);
    }

    public List getTables(String catalog, String schema, String name)
    {
        if(name != null || m_table == null) {
            return super.getTables(catalog, schema, name);
        }
        else {
            List tables = super.getTables(m_table.catalog, m_table.schema, m_table.name);
            List result = new ArrayList();
            Iterator it = tables.iterator();
            while(it.hasNext()) {
                Table table = (Table)it.next();
                if(table.matches(catalog, schema, name))
                    result.add(table);
            }
            return result;
        }
    }

    public void addTable(SQLTable table)
    {
        super.addTable(table);
        m_table = table;
    }

    public SQLSchema.Table getTable()
    {
        return getTable(m_table.catalog, m_table.schema, m_table.name);
    }

    public boolean setTable(String catalog, String schema, String name, String alias)
    {
        return super.setTable(catalog, schema, name, alias);
    }

    public void setUpdateListStart(int position)
    {
        ParserLogger.log("updateListStart: "+position);
        updateListStart = position;
        updateListEnd = NO_LIMIT;
    }

    public void setUpdateListEnd(int position)
    {
        updateListEnd = position;
    }

    public Completion getCompletion(int position)
    {
        Completion c = super.getCompletion(position);
        if(c == null) {
            if(position >= updateListStart && position <= updateListEnd) {
                SQLColumn col = new SQLColumn(this, position);
                col.setRepeatable(false);
                return col;
            }
        }
        return c;
    }
}

--- NEW FILE: SQLTable.java ---
/*
 * Copyright (C) 2002 Christian Sell
 * cs...@us...
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * created by cse, 27.09.2002 20:15:39
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLCompletion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.ParserLogger;

import java.util.List;
import java.util.Collections;

/**
 * this class represents a table completion, as it appears within the FROM
 * clause of a a select statement, and in other places.<br>
 * <em>Note: do not confuse with SQLSchema.Table</em>
 */
public class SQLTable extends SQLCompletion
{
    public String catalog;
    public String schema;
    public String name;
    public String alias;

    private SQLStatement statement;

    public SQLTable(SQLStatement statement, int start)
    {
        super(start);
        ParserLogger.log("SQLTable: "+start);
        this.statement = statement;
    }

    public SQLTable(SQLStatement statement, int start, int end)
    {
        super(start);
        ParserLogger.log("SQLTable: "+start+" "+end);
        this.statement = statement;
        setEndPosition(end);
    }

    public SQLStatement getStatement()
    {
        return statement;
    }

    public void setCatalog(String catalog, int pos)
    {
        this.catalog = catalog;
        setEndPosition(pos+catalog.length()-1);
    }

    public void setSchema(String schema, int pos)
    {
        this.schema = schema;
        setEndPosition(pos+schema.length()-1);
    }

    public void setName(String name, int pos)
    {
        this.name = name;
        setEndPosition(pos+name.length()-1);
    }

    public void setAlias(String alias, int pos)
    {
        this.alias = alias;
        setEndPosition(pos+alias.length()-1);
    }

    public SQLSchema.Table[] getCompletions(int position)
    {
        String tb = (name != null && position > startPosition) ?
              name.substring(0, position - startPosition) : null;

        List tables = getStatement().getTables(catalog, schema, tb);
        Collections.sort(tables);
        return (SQLSchema.Table[])tables.toArray(new SQLSchema.Table[tables.size()]);
    }

    /**
     * @return true if the name is set
     */
    protected boolean isConcrete()
    {
        return name != null;
    }

    /**
     * tables are safe to repeat, as they only appear in the from clause
     * @return <em>true</em>
     */
    public boolean isRepeatable()
    {
        return true;
    }

    public boolean mustReplace(int position)
    {
        return name != null && position >= startPosition && position <= endPosition;
    }

    public String getText(int position, String option)
    {
        return option;
    }
}

--- NEW FILE: SQLStatementContext.java ---
/*
 * net.sourceforge.squirrel_sql.client.session.parser.kernel.completions.SQLStatementContext
 * 
 * created by cse, 10.10.2002 16:49:35
 *
 * Copyright (c) 2002 DynaBEAN Consulting, all rights reserved
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.Completion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;


/**
 * a context which gives access to the nearest statement
 */
public interface SQLStatementContext extends Completion
{
    SQLStatement getStatement();
    void setSqlSchema(SQLSchema schema);
    void addContext(SQLStatementContext context);
    void addColumn(SQLColumn column);
}

--- NEW FILE: SQLStatement.java ---
/*
 * Copyright (C) 2002 Christian Sell
 * cs...@us...
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * created 24.09.2002 12:27:12
 *
 * @version $Id: SQLStatement.java,v 1.1 2004/04/04 10:36:30 colbell Exp $
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;


import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLCompletion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.Completion;

import java.util.*;


/**
 * a completion representing a full SQl statement. This object servers only
 * as a container for subelements, thus constituting a completion context.
 */
public class SQLStatement extends SQLCompletion implements SQLSchema, SQLStatementContext
{
    private SortedSet children;
    protected SQLSchema sqlSchema;


    public SQLStatement(int start)
    {
        super(start);
    }

    /**
     * @param position the position at which the completion should be inserted
     * @return the available completion
     */
    public Completion getCompletion(int position)
    {
        if(isEnclosed(position)) {
            Iterator it = getChildren();
            while(it.hasNext()) {
                Completion c = ((Completion)it.next()).getCompletion(position);
                if(c != null) return c;
            }
        }
        return null;
    }

    public void setSqlSchema(SQLSchema schema)
    {
        if(schema == this) throw new RuntimeException("internal error: recursive schema");
        this.sqlSchema = schema;
    }

    protected void addChild(Completion child)
    {
        if(children == null) children = new TreeSet(new ChildComparator());
        children.add(child);
    }

    public void addContext(SQLStatementContext context)
    {
        context.setSqlSchema(this);
        addChild(context);
    }

    public void setEndPosition(int offset)
    {
        super.setEndPosition(offset);
        if(sqlSchema instanceof SQLStatement)
            ((SQLStatement)sqlSchema).setEndPosition(offset);
    }

    public void addTable(SQLTable table)
    {
        addChild(table);
    }

    public boolean setTable(SQLTable table)
    {
        return setTable(table.catalog, table.schema, table.name, table.alias);
    }

    /**
     * take note of table usage, validating it against the underlying schema.
     * @param catalog catalog name (otional)
     * @param schema schema name (optional)
     * @param name table name (required)
     * @param alias alias (unused)
     * @return true if the table is valid
     */
    public boolean setTable(String catalog, String schema, String name, String alias)
    {
        return sqlSchema.getTable(catalog, schema, name) != null;
    }

    public Table getTable(String catalog, String schema, String name)
    {
        return sqlSchema.getTable(catalog, schema, name);
    }

    public List getTables(String catalog, String schema, String name)
    {
        return sqlSchema.getTables(catalog, schema, name);
    }

    public Table getTableForAlias(String alias)
    {
        return sqlSchema.getTableForAlias(alias);
    }

    public void addColumn(SQLColumn column)
    {
        addChild(column);
    }

    public SQLStatement getStatement()
    {
        return this;
    }

    protected Iterator getChildren()
    {
        return children != null ? children.iterator() : Collections.EMPTY_LIST.iterator();
    }

    /**
     * @return the unique table assigned to this statement, or <em>null</em> if this statement
     * can hold multiple tables, or no table was assigned. By default, <em>null</em>.
     */
    public Table getTable()
    {
        return null;
    }
}

--- NEW FILE: SQLSelectStatement.java ---
/*
 * Copyright (C) 2002 Christian Sell
 * cs...@us...
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * created by cse, 26.09.2002 15:14:45
 *
 * @version $Id: SQLSelectStatement.java,v 1.1 2004/04/04 10:36:30 colbell Exp $
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.Completion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.ParserLogger;

import java.util.Map;
import java.util.HashMap;
import java.util.List;
import java.util.Vector;


/**
 * an SQL select statement
 */
public class SQLSelectStatement extends SQLStatement
{
    private static final int FA_START = 0;
    private static final int FA_END = 1;

    private static final int FA_GROUPBY = 0;
    private static final int FA_HAVING = 1;
    private static final int FA_ORDERBY = 2;

    private Map aliasMap = new HashMap();
    private int selectListStart, selectListEnd, fromStart, fromEnd;

    private int[][] fieldAreas = new int[3][2]; //FA_xxx

	 private Vector listeners = new Vector();

    public SQLSelectStatement(int start)
    {
        super(start);
    }

    public void setSelectListStart(int start)
    {
        selectListStart = start;
        selectListEnd = NO_LIMIT;
        setEndPosition(selectListEnd);
    }

    public void setSelectListEnd(int end)
    {
        selectListEnd = end;
        setEndPosition(end);
    }

    public void setFromStart(int fromStart)
    {
        this.fromStart = fromStart;
        this.fromEnd = NO_LIMIT;
        setEndPosition(fromEnd);
    }

    public void setFromEnd(int fromEnd)
    {
        this.fromEnd = fromEnd;
        setEndPosition(fromEnd);
    }

    public void setGroupByStart(int start)
    {
        setFieldAreaStart(FA_GROUPBY, start);
    }

    public void setGroupByEnd(int whereEnd)
    {
        setFieldAreEnd(FA_GROUPBY, whereEnd);
    }

    public void setHavingStart(int start)
    {
        setFieldAreaStart(FA_HAVING, start);
    }

    public void setHavingEnd(int whereEnd)
    {
        setFieldAreEnd(FA_HAVING, whereEnd);
    }

    public void setOrderByStart(int start)
    {
        setFieldAreaStart(FA_ORDERBY, start);
    }

    public void setOrderByEnd(int whereEnd)
    {
        setFieldAreEnd(FA_ORDERBY, whereEnd);
    }

    private void setFieldAreaStart(int fa, int start)
    {
        fieldAreas[fa][FA_START] = start;
        fieldAreas[fa][FA_END] = NO_LIMIT;
        setEndPosition(NO_LIMIT);
    }

    private void setFieldAreEnd(int fa, int end)
    {
        fieldAreas[fa][FA_END] = end;
        setEndPosition(end);
    }

    public boolean setTable(String catalog, String schema, String name, String alias)
    {
        ParserLogger.log("setTable: "+alias+"."+name);
        Table table = sqlSchema.getTable(catalog, schema, name);
        if(table == null) return false;
        if(alias != null)
		  {
            aliasMap.put(alias, table.clone(alias));
			   fireAliasDefined(name, alias);
		  }
        return true;
    }

    public List getTables(String catalog, String schema, String name)
    {
        if(aliasMap.size() == 0)
            return sqlSchema.getTables(catalog, schema, name);
        else {
            List tables = sqlSchema.getTables(catalog, schema, name);
            tables.addAll(aliasMap.values());
            return tables;
        }
    }

    public SQLSchema.Table getTableForAlias(String alias)
    {
        SQLSchema.Table table = (SQLSchema.Table)aliasMap.get(alias);
        return table != null ? table : sqlSchema.getTableForAlias(alias);
    }

    public Completion getCompletion(int offset)
    {
        Completion comp = super.getCompletion(offset);
        if(comp != null) return comp;

        if(offset >= selectListStart && offset <= selectListEnd)
            return new SQLColumn(this, offset, offset);
        else if(offset >= fromStart && offset <= fromEnd)
            return new SQLTable(this, offset, offset);
        else {
            for(int i=0; i<fieldAreas.length; i++) {
                if(offset >= fieldAreas[i][FA_START] && offset <= fieldAreas[i][FA_END]) {
                    SQLColumn col = new SQLColumn(this, offset, offset);
                    col.setRepeatable(false);
                    return col;
                }
            }
        }
        return null;
    }

	 public void addListener(SQLSelectStatementListener l)
	 {
        listeners.add(l);
	 }

 	 public void removeListener(SQLSelectStatementListener l)
    {
	    listeners.remove(l);
	 }

	 private void fireAliasDefined(String tableName, String aliasName)
	 {
    	 SQLSelectStatementListener[] clone = (SQLSelectStatementListener[]) listeners.toArray(new SQLSelectStatementListener[listeners.size()]);

		 for (int i = 0; i < clone.length; i++)
		 {
			 clone[i].aliasDefined(tableName, aliasName);
		 }
	 }

}

--- NEW FILE: SQLWhere.java ---
/*
 * Copyright (C) 2002 Christian Sell
 * cs...@us...
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * created by cse, 10.10.2002 14:29:20
 *
 * @version $Id: SQLWhere.java,v 1.1 2004/04/04 10:36:30 colbell Exp $
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLCompletion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.Completion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;

import java.util.List;
import java.util.ArrayList;
import java.util.Iterator;


/**
 * a completion which represents the WHERE clause inside SELECT, UPDATE or DLETE
 * statements
 */
public class SQLWhere extends SQLCompletion implements SQLStatementContext
{
    private SQLStatement statement;
    private List children = new ArrayList();

    public SQLWhere(SQLStatement statement, int startPosition)
    {
        super(startPosition);
        this.statement = statement;
        setEndPosition(NO_LIMIT);
    }

    public void setEndPosition(int position)
    {
        statement.setEndPosition(position);
        super.setEndPosition(position);
    }

    public Completion getCompletion(int position)
    {
        if(super.getCompletion(position) != null) {
            Iterator it = children.iterator();
            while(it.hasNext()) {
                Completion comp = (Completion)it.next();
                if((comp = comp.getCompletion(position)) != null)
                    return comp;
            }
            SQLColumn col = new SQLColumn(this, position);
            col.setRepeatable(false);
            return col;
        }
        return null;
    }

    public SQLStatement getStatement()
    {
        return statement;
    }

    public void setSqlSchema(SQLSchema schema)
    {
        //schema should be identical to the statement. Ignore
    }

    public void addContext(SQLStatementContext context)
    {
        context.setSqlSchema(statement);
        children.add(context);
    }

    public void addColumn(SQLColumn column)
    {
        children.add(column);
    }
}

--- NEW FILE: SQLSelectStatementListener.java ---
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

public interface SQLSelectStatementListener
{
	void aliasDefined(String tableName, String aliasName);
}

--- NEW FILE: SQLColumn.java ---
/*
 * Copyright (C) 2002 Christian Sell
 * cs...@us...
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * created by cse, 24.09.2002 16:00:59
 *
 * @version $Id: SQLColumn.java,v 1.1 2004/04/04 10:36:30 colbell Exp $
 */
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLCompletion;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.SQLSchema;
import net.sourceforge.squirrel_sql.client.session.parser.kernel.ParserLogger;

/**
 * a completion suggesting column names
 */
public class SQLColumn extends SQLCompletion
{
    private String name;
    private String qualifier;

    private boolean isRepeatable = true;
    private SQLStatementContext parent;
    private int namePos = NO_POSITION;

    public SQLColumn(SQLStatementContext parent,  int start)
    {
        super(start);
        this.parent = parent;
    }

    public SQLColumn(SQLStatementContext parent, int start, int end)
    {
        super(start);
        this.parent = parent;
        setEndPosition(end);
    }

    public SQLColumn(SQLStatementContext parent)
    {
        super();
        this.parent = parent;
    }

    public void setQualifier(String alias, int pos)
    {
        this.qualifier = alias;
        this.namePos = pos+alias.length()+1;
        setEndPosition(namePos);
        ParserLogger.log("setAlias: s="+startPosition+" e="+endPosition);
    }

    public void setQualifier(String alias)
    {
        this.qualifier = alias;
    }

    public String getQualifier()
    {
        return qualifier;
    }

    public void setColumn(String name, int pos)
    {
        this.name = name;
        this.namePos = pos;
        setEndPosition(pos+name.length()-1);
    }

    public void setName(String name)
    {
        this.name = name;
    }

    public String getName()
    {
        return name;
    }

    /**
     * check whether a table assignment exists at the given cursor position. A table assignment
     * exists in the following cases:<br>
     * <ul><li>if the parent statement has only one table</li>
     * <li>if the cursor is placed immediately after the qualifier separator. It does not
     * exist if the column is not qualified (by alias or table name), or if the cursor is placed
     * inside the qualifier.</li>
     * @param position the caret position
     * @return whether a table assignment exists
     */
    public boolean hasTable(int position)
    {
        return
              (qualifier == null &&  parent.getStatement().getTable() != null) ||
              (qualifier != null &&
              position >= namePos && position <= endPosition &&
              parent.getStatement().getTableForAlias(qualifier) != null);
    }

    public SQLStatement getStatement()
    {
        return parent.getStatement();
    }

    public String getText()
    {
        String text = qualifier != null ? qualifier+"."+name : name;

        if(hasTextPosition()) {
            int oldDataPos = endPosition - startPosition;
            return text.substring(oldDataPos, text.length());
        } else {
            return text;
        }
    }

    /**
     * @return true if the name is set
     */
    protected boolean isConcrete()
    {
        return name != null;
    }

    public String getText(int position)
    {
        return getText(position, name);
    }

    public String getText(int position, String option)
    {
        if(position == endPosition) {
            return option;
        }
        else if(mustReplace(position) || isOther(position)) {
            return qualifier != null ? qualifier+"."+option : option;
        }
        else {
            String text = qualifier != null ? qualifier+"."+option : option;
            int oldDataPos = endPosition - position;
            return text.substring(oldDataPos, text.length());
        }
    }

    // check if this completion request is outside the original definition point
    private boolean isOther(int position)
    {
        return endPosition == NO_LIMIT || position < startPosition || position > endPosition;
    }

    public String[] getCompletions(int position)
    {
        SQLSchema.Table table = null;

        if(qualifier != null) {
            // try as an alias
            table = getStatement().getTableForAlias(qualifier);

            // could also be a table name
            if(table == null) table = getStatement().getTable(null, null, qualifier);
        }
        else
            // see if its a one-table statement
            table = getStatement().getTable();

        // now match the columns
        if(table != null) {
            String col = null;
            if(name != null && position > namePos) {
                col = position <= endPosition ? name.substring(0, position-namePos) : name;
            }
            String[] result = table.getColumns(col);
            return (col != null && result.length == 1 && result[0].length() == col.length()) ?
                EMPTY_RESULT : result;  //no need to return if completion is identical
        }
        else
            return EMPTY_RESULT;
    }

    public void setRepeatable(boolean repeatable)
    {
        isRepeatable = repeatable;
    }

    public boolean isRepeatable()
    {
        return isRepeatable;
    }

    public boolean mustReplace(int position)
    {
        return name != null && position >= startPosition && position <= endPosition;
    }
}

--- NEW FILE: ErrorListener.java ---
package net.sourceforge.squirrel_sql.client.session.parser.kernel.completions;

public interface ErrorListener
{
	void errorDetected(String message, int line, int column);
}