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Data Mapper package is a high-performance data binding package built on Jackson JSON processor

There is a newer version: 1.9.13

package org.codehaus.jackson.map.introspect;

import java.lang.reflect.Method;
import java.util.*;

/**
 * Simple helper class used to keep track of collection of
 * {@link AnnotatedMethod}s, accessible by lookup. Lookup
 * is usually needed for augmenting and overriding annotations.
 */
public final class AnnotatedMethodMap
    implements Iterable
{
    LinkedHashMap _methods;

    public AnnotatedMethodMap() { }

    /**
     * Method called to add specified annotation in the Map.
     */
    public void add(AnnotatedMethod am)
    {
        if (_methods == null) {
            _methods = new LinkedHashMap();
        }
        _methods.put(new MethodKey(am.getAnnotated()), am);
    }

    /**
     * Method called to remove specified method, assuming
     * it exists in the Map
     */
    public void remove(AnnotatedMethod am)
    {
        if (_methods != null) {
            _methods.remove(new MethodKey(am.getAnnotated()));
        }
    }

    public boolean isEmpty() {
        return (_methods == null || _methods.size() == 0);
    }

    public int size() {
        return (_methods == null) ? 0 : _methods.size();
    }

    public AnnotatedMethod find(String name, Class[] paramTypes)
    {
        if (_methods == null) {
            return null;
        }
        return _methods.get(new MethodKey(name, paramTypes));
    }

    public AnnotatedMethod find(Method m)
    {
        if (_methods == null) {
            return null;
        }
        return _methods.get(new MethodKey(m));
    }

    /*
    ///////////////////////////////////////////////////////
    // Iterable implementation (for iterating over values)
    ///////////////////////////////////////////////////////
     */

    public Iterator iterator()
    {
        if (_methods != null) {
            return _methods.values().iterator();
        }
        List empty = Collections.emptyList();
        return empty.iterator();
    }
}