001    package railo.runtime.type.comparator;
002    
003    import java.util.Comparator;
004    
005    import railo.runtime.exp.ExpressionException;
006    import railo.runtime.exp.PageException;
007    import railo.runtime.exp.PageRuntimeException;
008    import railo.runtime.op.Caster;
009    
010    
011    /**
012     * comparator implementation to compare textes
013     */
014    public final class TextComparator implements Comparator {
015            
016            private boolean isAsc;
017            private boolean ignoreCase;
018    
019            /**
020             * constructor of the class
021             * @param isAsc ascending or desending
022             * @param ignoreCase ignore case or not
023             */
024            public TextComparator(boolean isAsc, boolean ignoreCase) {
025                    this.isAsc=isAsc;
026                    this.ignoreCase=ignoreCase;
027            }
028            
029            @Override
030            public int compare(Object oLeft, Object oRight) {
031                    try {
032                            if(isAsc) return compareObjects(oLeft, oRight);
033                            return compareObjects(oRight, oLeft);
034                    } 
035                    catch (PageException e) {
036                            throw new PageRuntimeException(new ExpressionException("can only sort arrays with simple values",e.getMessage()));
037                    }
038            }
039            
040            private int compareObjects(Object oLeft, Object oRight) throws PageException {
041                    if(ignoreCase)return Caster.toString(oLeft).compareToIgnoreCase(Caster.toString(oRight));
042                    return Caster.toString(oLeft).compareTo(Caster.toString(oRight));
043            }
044    
045    }