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package com.fasterxml.jackson.databind.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
{
    protected Map _methods;

    public AnnotatedMethodMap() { }

    /**
     * @since 2.9
     */
    public AnnotatedMethodMap(Map m) {
        _methods = m;
    }

    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 MemberKey(name, paramTypes));
    }

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

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

    @Override
    public Iterator iterator()
    {
        if (_methods == null) {
            return Collections.emptyIterator();
        }
        return _methods.values().iterator();
    }
}