org.mvel2.jsr223.MvelBindings Maven / Gradle / Ivy
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package org.mvel2.jsr223;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import javax.script.Bindings;
public class MvelBindings implements Bindings {
/**
* The Map field stores the attributes.
*/
private Map map;
/**
* Constructor uses an existing Map to store the values.
*
* @param m The Map backing this SimpleBindings.
* @throws NullPointerException if m is null
*/
public MvelBindings(Map m) {
if (m == null) {
throw new NullPointerException();
}
this.map = m;
}
/**
* Default constructor uses a HashMap.
*/
public MvelBindings() {
this(new HashMap());
}
/**
* Sets the specified key/value in the underlying map field.
*
* @param name Name of value
* @param value Value to set.
*
* @return Previous value for the specified key. Returns null if key was previously unset.
*
* @throws NullPointerException if the name is null.
* @throws IllegalArgumentException if the name is empty.
*/
public Object put(String name, Object value) {
return map.put(name, value);
}
/**
* putAll is implemented using Map.putAll.
*
* @param toMerge The Map of values to add.
*
* @throws NullPointerException if toMerge map is null or if some key in the map is null.
* @throws IllegalArgumentException if some key in the map is an empty String.
*/
public void putAll(Map toMerge) {
if (toMerge == null) {
throw new NullPointerException("toMerge map is null");
}
for (Map.Entry entry : toMerge.entrySet()) {
String key = entry.getKey();
put(key, entry.getValue());
}
}
/** {@inheritDoc} */
public void clear() {
map.clear();
}
/**
* 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.)
*
* @param key key whose presence in this map is to be tested.
* @return true if this map contains a mapping for the specified key.
*
* @throws NullPointerException if key is null
* @throws ClassCastException if key is not String
* @throws IllegalArgumentException if key is empty String
*/
public boolean containsKey(Object key) {
return map.containsKey(key);
}
/** {@inheritDoc} */
public boolean containsValue(Object value) {
return map.containsValue(value);
}
/** {@inheritDoc} */
public Set> entrySet() {
return map.entrySet();
}
/**
* 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.)
*
* @param key key whose associated value is to be returned.
* @return the value to which this map maps the specified key, or null if the map
* contains no mapping for this key.
*
* @throws NullPointerException if key is null
* @throws ClassCastException if key is not String
* @throws IllegalArgumentException if key is empty String
*/
public Object get(Object key) {
return map.get(key);
}
/** {@inheritDoc} */
public boolean isEmpty() {
return map.isEmpty();
}
/** {@inheritDoc} */
public Set keySet() {
return map.keySet();
}
/**
* 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.
*
* @param key key whose mapping is to be removed from the map.
* @return previous value associated with specified key, or null if there was no
* mapping for key.
*
* @throws NullPointerException if key is null
* @throws ClassCastException if key is not String
* @throws IllegalArgumentException if key is empty String
*/
public Object remove(Object key) {
return map.remove(key);
}
/** {@inheritDoc} */
public int size() {
return map.size();
}
/** {@inheritDoc} */
public Collection