| 1 | package org.sqlorm.querybuilder; |
| 2 | |
| 3 | /** |
| 4 | * @author kasper graversen |
| 5 | */ |
| 6 | class ColumnIdentifierExpr implements IPositionSelectColumn, IPositionOrderBy { |
| 7 | private final String select; |
| 8 | private final String alias; |
| 9 | |
| 10 | public ColumnIdentifierExpr(final String select) { |
| 11 | this(select, ""); |
| 12 | } |
| 13 | |
| 14 | public ColumnIdentifierExpr(final String select, final String alias) { |
| 15 | if(select.trim().equals("")) |
| 16 | throw new IllegalArgumentException("Select parameter cannot be the empty string"); |
| 17 | this.select = select; |
| 18 | this.alias = alias; |
| 19 | } |
| 20 | |
| 21 | @Override |
| 22 | public boolean equals(final Object other) { |
| 23 | if(other instanceof ColumnIdentifierExpr == false) |
| 24 | return false; |
| 25 | final ColumnIdentifierExpr o = (ColumnIdentifierExpr) other; |
| 26 | return select.equals(o.select) && alias.equals(o.alias); |
| 27 | } |
| 28 | |
| 29 | public void toSql(final StringBuilder sb, final String indent) { |
| 30 | sb.append(indent + select + (alias.equals("") ? "" : " AS " + alias)); |
| 31 | } |
| 32 | } |