/*
* The contents of this file are subject to the terms
* of the Common Development and Distribution License
* (the "License"). You may not use this file except
* in compliance with the License.
*
* You can obtain a copy of the license at
* glassfish/bootstrap/legal/CDDLv1.0.txt or
* https://glassfish.dev.java.net/public/CDDLv1.0.html.
* See the License for the specific language governing
* permissions and limitations under the License.
*
* When distributing Covered Code, include this CDDL
* HEADER in each file and include the License file at
* glassfish/bootstrap/legal/CDDLv1.0.txt. If applicable,
* add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your
* own identifying information: Portions Copyright [yyyy]
* [name of copyright owner]
*/
/*
* @(#)ActivationDataFlavor.java 1.14 05/11/16
*
* Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved.
*/
package javax.activation;
import java.awt.datatransfer.
DataFlavor;
import java.io.
IOException;
import javax.activation.
MimeType;
/**
* The ActivationDataFlavor class is a special subclass of
* <code>java.awt.datatransfer.DataFlavor</code>. It allows the JAF to
* set all three values stored by the DataFlavor class via a new
* constructor. It also contains improved MIME parsing in the <code>equals
* </code> method. Except for the improved parsing, its semantics are
* identical to that of the JDK's DataFlavor class.
*/
public class
ActivationDataFlavor extends
DataFlavor {
/*
* Raison d'etre:
*
* The DataFlavor class included in JDK 1.1 has several limitations
* including piss poor MIME type parsing, and the limitation of
* only supporting serialized objects and InputStreams as
* representation objects. This class 'fixes' that.
*/
// I think for now I'll keep copies of all the variables and
// then later I may choose try to better coexist with the base
// class *sigh*
private
String mimeType = null;
private
MimeType mimeObject = null;
private
String humanPresentableName = null;
private
Class representationClass = null;
/**
* Construct a DataFlavor that represents an arbitrary
* Java object. This constructor is an extension of the
* JDK's DataFlavor in that it allows the explicit setting
* of all three DataFlavor attributes.
* <p>
* The returned DataFlavor will have the following characteristics:
* <p>
* representationClass = representationClass<br>
* mimeType = mimeType<br>
* humanName = humanName
* <p>
*
* @param representationClass the class used in this DataFlavor
* @param mimeType the MIME type of the data represented by this class
* @param humanPresentableName the human presentable name of the flavor
*/
public
ActivationDataFlavor(
Class representationClass,
String mimeType,
String humanPresentableName) {
super(
mimeType,
humanPresentableName); // need to call super
// init private variables:
this.
mimeType =
mimeType;
this.
humanPresentableName =
humanPresentableName;
this.
representationClass =
representationClass;
}
/**
* Construct a DataFlavor that represents a MimeType.
* <p>
* The returned DataFlavor will have the following characteristics:
* <p>
* If the mimeType is "application/x-java-serialized-object;
* class=", the result is the same as calling new
* DataFlavor(Class.forName()) as above.
* <p>
* otherwise:
* <p>
* representationClass = InputStream<p>
* mimeType = mimeType<p>
*
* @param representationClass the class used in this DataFlavor
* @param humanPresentableName the human presentable name of the flavor
*/
public
ActivationDataFlavor(
Class representationClass,
String humanPresentableName) {
super(
representationClass,
humanPresentableName);
this.
mimeType = super.getMimeType();
this.
representationClass =
representationClass;
this.
humanPresentableName =
humanPresentableName;
}
/**
* Construct a DataFlavor that represents a MimeType.
* <p>
* The returned DataFlavor will have the following characteristics:
* <p>
* If the mimeType is "application/x-java-serialized-object; class=",
* the result is the same as calling new DataFlavor(Class.forName()) as
* above, otherwise:
* <p>
* representationClass = InputStream<p>
* mimeType = mimeType
*
* @param mimeType the MIME type of the data represented by this class
* @param humanPresentableName the human presentable name of the flavor
*/
public
ActivationDataFlavor(
String mimeType,
String humanPresentableName) {
super(
mimeType,
humanPresentableName);
this.
mimeType =
mimeType;
try {
this.
representationClass =
Class.
forName("java.io.InputStream");
} catch (
ClassNotFoundException ex) {
// XXX - should never happen, ignore it
}
this.
humanPresentableName =
humanPresentableName;
}
/**
* Return the MIME type for this DataFlavor.
*
* @return the MIME type
*/
public
String getMimeType() {
return
mimeType;
}
/**
* Return the representation class.
*
* @return the representation class
*/
public
Class getRepresentationClass() {
return
representationClass;
}
/**
* Return the Human Presentable name.
*
* @return the human presentable name
*/
public
String getHumanPresentableName() {
return
humanPresentableName;
}
/**
* Set the human presentable name.
*
* @param humanPresentableName the name to set
*/
public void
setHumanPresentableName(
String humanPresentableName) {
this.
humanPresentableName =
humanPresentableName;
}
/**
* Compares the DataFlavor passed in with this DataFlavor; calls
* the <code>isMimeTypeEqual</code> method.
*
* @param dataFlavor the DataFlavor to compare with
* @return true if the MIME type and representation class
* are the same
*/
public boolean
equals(
DataFlavor dataFlavor) {
return (
isMimeTypeEqual(
dataFlavor) &&
dataFlavor.
getRepresentationClass() ==
representationClass);
}
/**
* Is the string representation of the MIME type passed in equivalent
* to the MIME type of this DataFlavor. <p>
*
* ActivationDataFlavor delegates the comparison of MIME types to
* the MimeType class included as part of the JavaBeans Activation
* Framework. This provides a more robust comparison than is normally
* available in the DataFlavor class.
*
* @param mimeType the MIME type
* @return true if the same MIME type
*/
public boolean
isMimeTypeEqual(
String mimeType) {
MimeType mt = null;
try {
if (
mimeObject == null)
mimeObject = new
MimeType(this.
mimeType);
mt = new
MimeType(
mimeType);
} catch (
MimeTypeParseException e) {}
return
mimeObject.
match(
mt);
}
/**
* Called on DataFlavor for every MIME Type parameter to allow DataFlavor
* subclasses to handle special parameters like the text/plain charset
* parameters, whose values are case insensitive. (MIME type parameter
* values are supposed to be case sensitive).
* <p>
* This method is called for each parameter name/value pair and should
* return the normalized representation of the parameterValue.
* This method is never invoked by this implementation.
*
* @param parameterName the parameter name
* @param parameterValue the parameter value
* @return the normalized parameter value
* @deprecated
*/
protected
String normalizeMimeTypeParameter(
String parameterName,
String parameterValue) {
return
parameterValue;
}
/**
* Called for each MIME type string to give DataFlavor subtypes the
* opportunity to change how the normalization of MIME types is
* accomplished.
* One possible use would be to add default parameter/value pairs in cases
* where none are present in the MIME type string passed in.
* This method is never invoked by this implementation.
*
* @param mimeType the MIME type
* @return the normalized MIME type
* @deprecated
*/
protected
String normalizeMimeType(
String mimeType) {
return
mimeType;
}
}