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Android Reference

Attributes


java.util.jar

Class Attributes

  • All Implemented Interfaces:
    Cloneable, Map<Object,Object>


    public class Attributes
    extends Object
    implements Cloneable, Map<Object,Object>
    The Attributes class is used to store values for manifest entries. Attribute keys are generally instances of Attributes.Name. Values associated with attribute keys are of type String.
    • Nested Class Summary

      Nested Classes
      Modifier and Type Class and Description
      static class Attributes.Name
      The name part of the name/value pairs constituting an attribute as defined by the specification of the JAR manifest.
      • Nested classes/interfaces inherited from interface java.util.Map

        Map.Entry<K,V>
    • Field Summary

      Fields
      Modifier and Type Field and Description
      protected Map<Object,Object> map
      The Attributes as name/value pairs.
    • Constructor Summary

      Constructors
      Constructor and Description
      Attributes()
      Constructs an Attributes instance.
      Attributes(Attributes attrib)
      Constructs an Attributes instance obtaining keys and values from the parameter attrib.
      Attributes(int size)
      Constructs an Attributes instance with initial capacity of size size.
    • Method Summary

      Methods
      Modifier and Type Method and Description
      void clear()
      Removes all key/value pairs from this Attributes.
      Object clone()
      Creates and returns a copy of this Object.
      boolean containsKey(Object key)
      Determines whether this Attributes contains the specified key.
      boolean containsValue(Object value)
      Determines whether this Attributes contains the specified value.
      Set<Map.Entry<Object,Object>> entrySet()
      Returns a set containing map entries for each of the key/value pair contained in this Attributes.
      boolean equals(Object obj)
      Determines if this Attributes and the parameter Attributes are equal.
      Object get(Object key)
      Returns the value associated with the parameter key.
      String getValue(Attributes.Name name)
      Returns the value associated with the parameter Attributes.Name key.
      String getValue(String name)
      Returns the string associated with the parameter name.
      int hashCode()
      Returns the hash code of this Attributes.
      boolean isEmpty()
      Determines whether this Attributes contains any keys.
      Set<Object> keySet()
      Returns a Set containing all the keys found in this Attributes.
      Object put(Object key, Object value)
      Stores key/value pairs in this Attributes.
      void putAll(Map<?,?> attrib)
      Stores all the key/value pairs in the argument in this Attributes.
      String putValue(String name, String val)
      Stores the value val associated with the key name in this Attributes.
      Object remove(Object key)
      Deletes the key/value pair with key key from this Attributes.
      int size()
      Returns the number of key/value pairs associated with this Attributes.
      Collection<Object> values()
      Returns a collection of all the values present in this Attributes.
    • Field Detail

      • map

        protected Map<Object,Object> map
        The Attributes as name/value pairs. Maps the attribute names (as Attributes.Name) of a JAR file manifest to arbitrary values. The attribute names thus are obtained from the Manifest for convenience.
    • Constructor Detail

      • Attributes

        public Attributes()
        Constructs an Attributes instance.
      • Attributes

        public Attributes(Attributes attrib)
        Constructs an Attributes instance obtaining keys and values from the parameter attrib.
        Parameters:
        attrib - The attributes to obtain entries from.
      • Attributes

        public Attributes(int size)
        Constructs an Attributes instance with initial capacity of size size.
        Parameters:
        size - Initial size of this Attributes instance.
    • Method Detail

      • containsKey

        public boolean containsKey(Object key)
        Determines whether this Attributes contains the specified key.
        Specified by:
        containsKey in interface Map<Object,Object>
        Parameters:
        key - The key to search for.
        Returns:
        true if the key is found, false otherwise.
      • containsValue

        public boolean containsValue(Object value)
        Determines whether this Attributes contains the specified value.
        Specified by:
        containsValue in interface Map<Object,Object>
        Parameters:
        value - the value to search for.
        Returns:
        true if the value is found, false otherwise.
      • entrySet

        public Set<Map.Entry<Object,Object>> entrySet()
        Returns a set containing map entries for each of the key/value pair contained in this Attributes.
        Specified by:
        entrySet in interface Map<Object,Object>
        Returns:
        a set of Map.Entry's
      • get

        public Object get(Object key)
        Returns the value associated with the parameter key.
        Specified by:
        get in interface Map<Object,Object>
        Parameters:
        key - the key to search for.
        Returns:
        Object associated with key, or null if key does not exist.
      • isEmpty

        public boolean isEmpty()
        Determines whether this Attributes contains any keys.
        Specified by:
        isEmpty in interface Map<Object,Object>
        Returns:
        true if one or more keys exist, false otherwise.
        See Also:
        Map.size()
      • keySet

        public Set<Object> keySet()
        Returns a Set containing all the keys found in this Attributes.
        Specified by:
        keySet in interface Map<Object,Object>
        Returns:
        a Set of all keys.
      • put

        public Object put(Object key,
                 Object value)
        Stores key/value pairs in this Attributes.
        Specified by:
        put in interface Map<Object,Object>
        Parameters:
        key - the key to associate with value.
        value - the value to store in this Attributes.
        Returns:
        the value being stored.
        Throws:
        ClassCastException - when key is not an Attributes.Name or value is not a String.
      • putAll

        public void putAll(Map<?,?> attrib)
        Stores all the key/value pairs in the argument in this Attributes.
        Specified by:
        putAll in interface Map<Object,Object>
        Parameters:
        attrib - the associations to store (must be of type Attributes).
      • remove

        public Object remove(Object key)
        Deletes the key/value pair with key key from this Attributes.
        Specified by:
        remove in interface Map<Object,Object>
        Parameters:
        key - the key to remove.
        Returns:
        the values associated with the removed key, null if not present.
      • size

        public int size()
        Returns the number of key/value pairs associated with this Attributes.
        Specified by:
        size in interface Map<Object,Object>
        Returns:
        the size of this Attributes.
      • values

        public Collection<Object> values()
        Returns a collection of all the values present in this Attributes.
        Specified by:
        values in interface Map<Object,Object>
        Returns:
        a collection of all values present.
      • clone

        public Object clone()
        Description copied from class: Object
        Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.
        Overrides:
        clone in class Object
        Returns:
        a copy of this object.
      • equals

        public boolean equals(Object obj)
        Determines if this Attributes and the parameter Attributes are equal. Two Attributes instances are equal if they contain the same keys and values.
        Specified by:
        equals in interface Map<Object,Object>
        Overrides:
        equals in class Object
        Parameters:
        obj - the object with which this Attributes is compared.
        Returns:
        true if the Attributes are equal, false otherwise.
        See Also:
        Object.hashCode()
      • getValue

        public String getValue(Attributes.Name name)
        Returns the value associated with the parameter Attributes.Name key.
        Parameters:
        name - the key to obtain the value for.
        Returns:
        the String associated with name, or null if name is not a valid key.
      • getValue

        public String getValue(String name)
        Returns the string associated with the parameter name.
        Parameters:
        name - the key to obtain the value for.
        Returns:
        the string associated with name, or null if name is not a valid key.
      • putValue

        public String putValue(String name,
                      String val)
        Stores the value val associated with the key name in this Attributes.
        Parameters:
        name - the key to store.
        val - the value to store in this Attributes.
        Returns:
        the value being stored.


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