Package org.apache.poi.hpsf

Class CustomProperties

  • All Implemented Interfaces:
    Map<String,​Object>
    public class CustomProperties
extends Object
implements Map<String,​Object>
    Maintains the instances of CustomProperty that belong to a DocumentSummaryInformation. The class maintains the names of the custom properties in a dictionary. It implements the Map interface and by this provides a simplified view on custom properties: A property's name is the key that maps to a typed value. This implementation hides property IDs from the developer and regards the property names as keys to typed values.

    While this class provides a simple API to custom properties, it ignores the fact that not names, but IDs are the real keys to properties. Under the hood this class maintains a 1:1 relationship between IDs and names. Therefore you should not use this class to process property sets with several IDs mapping to the same name or with properties without a name: the result will contain only a subset of the original properties. If you really need to deal such property sets, use HPSF's low-level access methods.

    An application can call the isPure method to check whether a property set parsed by CustomProperties is still pure (i.e. unmodified) or whether one or more properties have been dropped.

    This class is not thread-safe; concurrent access to instances of this class must be synchronized.

    While this class is roughly HashMap<Long,CustomProperty>, that's the internal representation. To external calls, it should appear as HashMap<String,Object> mapping between Names and Custom Property Values.

    • Constructor Detail

      • CustomProperties

        public CustomProperties()

    • Method Detail

      • put

        public Object put​(String key,
                  Object value)
        Adds a named property.
        Specified by:
        put in interface Map<String,​Object>
        Parameters:
        key - The property's name.
        value - The property's value.
        Returns:
        the property that was stored under the specified name before, or null if there was no such property before.

      • get

        public Object get​(Object key)
        Gets a named value from the custom properties - only works for keys of type String
        Specified by:
        get in interface Map<String,​Object>
        Parameters:
        key - the name of the value to get
        Returns:
        the value or null if a value with the specified name is not found in the custom properties.

      • remove

        public CustomProperty remove​(Object key)
        Removes a custom property - only works for keys of type String
        Specified by:
        remove in interface Map<String,​Object>
        Parameters:
        key - The name of the custom property to remove
        Returns:
        The removed property or null if the specified property was not found.

      • keySet

        public Set<String> keySet()
        Returns a set of all the names of our custom properties. Equivalent to nameSet()
        Specified by:
        keySet in interface Map<String,​Object>
        Returns:
        a set of all the names of our custom properties

      • nameSet

        public Set<String> nameSet()
        Returns a set of all the names of our custom properties
        Returns:
        a set of all the names of our custom properties

      • idSet

        public Set<Long> idSet()
        Returns a set of all the IDs of our custom properties
        Returns:
        a set of all the IDs of our custom properties

      • setCodepage

        public void setCodepage​(int codepage)
        Sets the codepage.
        Parameters:
        codepage - the codepage

      • getCodepage

        public int getCodepage()
        Gets the codepage.
        Returns:
        the codepage or -1 if the codepage is undefined.

      • containsKey

        public boolean containsKey​(Object key)
        Checks against both String Name and Long ID
        Specified by:
        containsKey in interface Map<String,​Object>

      • containsValue

        public boolean containsValue​(Object value)
        Checks against both the property, and its values.
        Specified by:
        containsValue in interface Map<String,​Object>

      • isPure

        public boolean isPure()
        Tells whether this CustomProperties instance is pure or one or more properties of the underlying low-level property set has been dropped.
        Returns:
        true if the CustomProperties is pure, else false.

      • setPure

        public void setPure​(boolean isPure)
        Sets the purity of the custom property set.
        Parameters:
        isPure - the purity