Application: gvSIG desktop

import java.util.ArrayList;

import java.util.Map;

    public boolean has_key(String key) {

        Object x = this.getType().get(key);

        return x != null;

    }

    public List<String> keys() {

        List<String> ks = new ArrayList<>();

        for( FeatureAttributeDescriptor attr : this.getType()) {

            ks.add(attr.getName());

        }

        return ks;

    }

    public Iterator<String> iterkeys() {

        final Iterator it = this.getType().iterator();

        return new Iterator<String>() {

            @Override

            public boolean hasNext() {

                return it.hasNext();

            }

            @Override

            public String next() {

                return ((FeatureAttributeDescriptor)it.next()).getName();

            }

        };

    }

    public Iterator iteritems() {

        final Iterator it = this.getType().iterator();

        return new Iterator<Map.Entry>() {

            @Override

            public boolean hasNext() {

                return it.hasNext();

            }

            @Override

            public Map.Entry next() {

                final String name = ((FeatureAttributeDescriptor)it.next()).getName();

                return new Map.Entry<String, Object>() {

                    @Override

                    public String getKey() {

                        return name;

                    }

                    @Override

                    public Object getValue() {

                        return get(name);

                    }

                    @Override

                    public Object setValue(Object value) {

                        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.

                    }

                };

            }

        };        

    }

    @Override