public SimpleBindings() 
{
        this(new HashMap< String,Object >());
}

Default constructor uses a HashMap.

 public SimpleBindings(Map m) 
{
        if (m == null) {
            throw new NullPointerException();
        }
        this.map = m;
}

Constructor uses an existing Map to store the values.

Parameters:

m - The Map backing this SimpleBindings.

Throws:

NullPointerException - if m is null

 public  void clear() 
{
        map.clear();
}

{@inheritDoc}

 public boolean containsKey(Object key) 
{
        checkKey(key);
        return map.containsKey(key);
}

Returns true if this map contains a mapping for the specified key. More formally, returns true if and only if this map contains a mapping for a key k such that (key==null ? k==null : key.equals(k)). (There can be at most one such mapping.)

 public boolean containsValue(Object value) 
{
        return map.containsValue(value);
}

{@inheritDoc}

 public Set entrySet() 
{
        return map.entrySet();
}

{@inheritDoc}

 public Object get(Object key) 
{
        checkKey(key);
        return map.get(key);
}

Returns the value to which this map maps the specified key. Returns null if the map contains no mapping for this key. A return value of null does not necessarily indicate that the map contains no mapping for the key; it's also possible that the map explicitly maps the key to null. The containsKey operation may be used to distinguish these two cases.

More formally, if this map contains a mapping from a key k to a value v such that (key==null ? k==null : key.equals(k)), then this method returns v; otherwise it returns null. (There can be at most one such mapping.)

 public boolean isEmpty() 
{
        return map.isEmpty();
}

{@inheritDoc}

 public Set keySet() 
{
        return map.keySet();
}

{@inheritDoc}

 public Object put(String name,
    Object value) 
{
        checkKey(name);
        return map.put(name,value);
}

Sets the specified key/value in the underlying map field.

 public  void putAll(Map toMerge) 
{
        if (toMerge == null) {
            throw new NullPointerException("toMerge map is null");
        }
        for (Map.Entry< ? extends String, ? extends Object > entry : toMerge.entrySet()) {
            String key = entry.getKey();
            checkKey(key);
            put(key, entry.getValue());
        }
}

putAll is implemented using Map.putAll.

 public Object remove(Object key) 
{
        checkKey(key);
        return map.remove(key);
}

Removes the mapping for this key from this map if it is present (optional operation). More formally, if this map contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed. (The map can contain at most one such mapping.)

Returns the value to which the map previously associated the key, or null if the map contained no mapping for this key. (A null return can also indicate that the map previously associated null with the specified key if the implementation supports null values.) The map will not contain a mapping for the specified key once the call returns.

 public int size() 
{
        return map.size();
}

{@inheritDoc}

 public Collection values() 
{
        return map.values();
}

{@inheritDoc}