Examples of jnr.constants.Constant

jnr.constants.Constant
A class that represents a native platform constant

        }
    }


    
    private Constant getConstant(E e) {
        Constant c;
        if (cacheGuard != 0 && (c = cache[e.ordinal()]) != null) { // read volatile guard
            return c;
        }
        // fallthru to slow lookup+add
        return lookupAndCacheConstant(e);

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        return lookupAndCacheConstant(e);
    }


    private Constant lookupAndCacheConstant(E e) {
        synchronized (modLock) {
            Constant c;


            // Recheck, in case another thread loaded the table
            if (cacheGuard != 0 && (c = cache[e.ordinal()]) != null) {
                return c;
            }
            EnumSet<E> enums = EnumSet.allOf(enumType);
            ConstantSet cset = getConstants();
            if (cache == null) {
                cache = new Constant[enums.size()];
            }
            
            long known = 0, unknown = 0;
            for (Enum v : enums) {
                c = cset.getConstant(v.name());
                if (c == null) {
                    if (bitmask) {
                        // Flag the value as unknown - real values will be
                        // inserted once all values are resolved, so there are
                        // no collisions
                        unknown |= (1L << v.ordinal());
                        c = new UnknownConstant(0, v.name());
                    } else {
                        c = new UnknownConstant(nextUnknown.getAndAdd(1), v.name());
                    }
                } else if (bitmask) {
                    known |= c.longValue();
                }
                cache[v.ordinal()] = c;
            }


            //

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        e = reverseLookupMap.get(value);
        if (e != null) {
            return e;
        }
        
        Constant c = getConstants().getConstant(value);
        if (c != null) {
            try {
                e = Enum.valueOf(enumType, c.name());
                reverseLookupMap.put(value, e);
                if (c.intValue() >= 0 && c.intValue() < 256) {
                    E[] values = valueCache;
                    if (values == null) {
                        values = (E[]) Array.newInstance(enumType, 256);
                    }
                    values[c.intValue()] = e;
                    valueCache = values;
                }
                return e;
            } catch (IllegalArgumentException ex) {}
        }

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                // define EAGAIN now, so that future EWOULDBLOCK will alias to it
                // see MRI's error.c and its explicit ordering of Errno definitions.
                createSysErr(Errno.EAGAIN.intValue(), Errno.EAGAIN.name());
                
                for (Errno e : Errno.values()) {
                    Constant c = (Constant) e;
                    if (Character.isUpperCase(c.name().charAt(0))) {
                        createSysErr(c.intValue(), c.name());
                    }
                }
            } catch (Exception e) {
                // dump the trace and continue
                // this is currently only here for Android, which seems to have

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    }


    public <E extends Enum<E>> void loadConstantSet(RubyModule module, Class<E> enumClass) {
        for (E e : EnumSet.allOf(enumClass)) {
            Constant c = (Constant) e;
            if (Character.isUpperCase(c.name().charAt(0))) {
                module.setConstant(c.name(), newFixnum(c.intValue()));
            }
        }
    }

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                // define EAGAIN now, so that future EWOULDBLOCK will alias to it
                // see MRI's error.c and its explicit ordering of Errno definitions.
                createSysErr(Errno.EAGAIN.intValue(), Errno.EAGAIN.name());
                
                for (Errno e : Errno.values()) {
                    Constant c = (Constant) e;
                    if (Character.isUpperCase(c.name().charAt(0))) {
                        createSysErr(c.intValue(), c.name());
                    }
                }


                // map ENOSYS to NotImplementedError
                errnos.put(Errno.ENOSYS.intValue(), notImplementedError);

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        return checkpointInvalidator;
    }
    
    public <E extends Enum<E>> void loadConstantSet(RubyModule module, Class<E> enumClass) {
        for (E e : EnumSet.allOf(enumClass)) {
            Constant c = (Constant) e;
            if (Character.isUpperCase(c.name().charAt(0))) {
                module.setConstant(c.name(), newFixnum(c.intValue()));
            }
        }
    }

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Related Classes of jnr.constants.Constant

jnr.constants.platform.ConstantResolver

org.jruby.Ruby

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