org.apache.poi.hpsf

Class Property

java.lang.Object

org.apache.poi.hpsf.Property

Direct Known Subclasses:

MutableProperty

public class Property
extends java.lang.Object

A property in a Section of a PropertySet.

The property's ID gives the property a meaning in the context of its Section. Each Section spans its own name space of property IDs.

The property's type determines how its value is interpreted. For example, if the type is Variant.VT_LPSTR (byte string), the value consists of a DWord telling how many bytes the string contains. The bytes follow immediately, including any null bytes that terminate the string. The type Variant.VT_I4 denotes a four-byte integer value, Variant.VT_FILETIME some date and time (of a file).

Please note that not all Variant types yet. This might change over time but largely depends on your feedback so that the POI team knows which variant types are really needed. So please feel free to submit error reports or patches for the types you need.

Microsoft documentation: Property Set Display Name Dictionary.

See Also:

Section, Variant

Constructor Summary

Constructors

Constructor and Description
Property(long id, byte[] src, long offset, int length, int codepage) Creates a Property instance by reading its bytes from the property set stream.
Property(long id, long type, java.lang.Object value) Creates a property.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Compares two properties.
long	getID() Returns the property's ID.
long	getType() Returns the property's type.
java.lang.Object	getValue() Returns the property's value.
int	hashCode()
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Property

public Property(long id,
                long type,
                java.lang.Object value)

Creates a property.

Parameters:

id - the property's ID.

type - the property's type, see Variant.

value - the property's value. Only certain types are allowed, see Variant.

Property

public Property(long id,
                byte[] src,
                long offset,
                int length,
                int codepage)
         throws java.io.UnsupportedEncodingException

Creates a Property instance by reading its bytes from the property set stream.

Parameters:

id - The property's ID.

src - The bytes the property set stream consists of.

offset - The property's type/value pair's offset in the section.

length - The property's type/value pair's length in bytes.

codepage - The section's and thus the property's codepage. It is needed only when reading string values.

Throws:

java.io.UnsupportedEncodingException - if the specified codepage is not supported.

Method Detail

getID

public long getID()

Returns the property's ID.

Returns:

The ID value

getType

public long getType()

Returns the property's type.

Returns:

The type value

getValue

public java.lang.Object getValue()

Returns the property's value.

Returns:

The property's value

equals

public boolean equals(java.lang.Object o)

Compares two properties.

Please beware that a property with ID == 0 is a special case: It does not have a type, and its value is the section's dictionary. Another special case are strings: Two properties may have the different types Variant.VT_LPSTR and Variant.VT_LPWSTR;

Overrides:

equals in class java.lang.Object

See Also:

Object.equals(java.lang.Object)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

See Also:

Object.hashCode()

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()