001    /**
002     * Implements the CFML Function len
003     */
004    package railo.runtime.functions.string;
005    
006    import java.util.List;
007    import java.util.Map;
008    
009    import railo.runtime.PageContext;
010    import railo.runtime.exp.FunctionException;
011    import railo.runtime.ext.function.Function;
012    import railo.runtime.op.Caster;
013    import railo.runtime.type.Collection;
014    import railo.runtime.type.Query;
015    
016    public final class Len implements Function {
017            public static double call(PageContext pc , String string) {
018                    return string.length();
019            }
020            public static double call(PageContext pc , Object obj) throws FunctionException {
021                    double len=invoke(obj, -1);
022                    if(len==-1)throw new FunctionException(pc,"len",1,"object","this type  ["+Caster.toTypeName(obj)+"] is not supported for returning the len");
023                    return len;
024            }
025            
026            public static double invoke(Object obj, double defaultValue) {
027                    if(obj instanceof String)return ((String)obj).length();
028                    if(obj instanceof Query)return ((Query)obj).getRecordcount();
029                    if(obj instanceof Collection)return ((Collection)obj).size();
030                    if(obj instanceof Map)return ((Map)obj).size();
031                    if(obj instanceof List)return ((List)obj).size();
032                    if(obj instanceof Object[])return ((Object[])obj).length;
033                    if(obj instanceof short[])return ((short[])obj).length;
034                    if(obj instanceof int[])return ((int[])obj).length;
035                    if(obj instanceof float[])return ((float[])obj).length;
036                    if(obj instanceof double[])return ((double[])obj).length;
037                    if(obj instanceof long[])return ((long[])obj).length;
038                    if(obj instanceof char[])return ((char[])obj).length;
039                    if(obj instanceof boolean[])return ((boolean[])obj).length;
040                    if(obj instanceof StringBuffer)return ((StringBuffer)obj).length();
041                    if(obj instanceof StringBuilder)return ((StringBuilder)obj).length();
042                    return defaultValue;
043            }
044    }