Method length

output/java8/1.4.12/Interpreter.java:1055–1071

Return the length of a multi-valued attribute or 1 if it is a single attribute. If v is null return 0. The implementation treats several common collections and arrays as special cases for speed.

(Object v)

     */

    public Object length(Object v) {
        if ( v==null ) return 0;
        int i = 1;      // we have at least one of something. Iterator and arrays might be empty.
        if ( v instanceof Map ) i = ((Map<?, ?>)v).size();
        else if ( v instanceof Collection ) i = ((Collection<?>)v).size();
        else if ( v instanceof Object[] ) i = ((Object[])v).length;
        else if ( v.getClass().isArray() ) i = Array.getLength(v);
        else if ( v instanceof Iterable || v instanceof Iterator ) {
                 Iterator<?> it = v instanceof Iterable ? ((Iterable<?>)v).iterator() : (Iterator<?>)v;
                 i = 0;
                 while ( it.hasNext() ) {
                     it.next();
                     i++;
                 }
             }
        return i;
    }

    protected String toString(STWriter out, InstanceScope scope, Object value) {
        if ( value!=null ) {