214 lines
6.4 KiB
Java
214 lines
6.4 KiB
Java
|
/* IIOMetadata.java --
|
||
|
Copyright (C) 2004 Free Software Foundation, Inc.
|
||
|
|
||
|
This file is part of GNU Classpath.
|
||
|
|
||
|
GNU Classpath is free software; you can redistribute it and/or modify
|
||
|
it under the terms of the GNU General Public License as published by
|
||
|
the Free Software Foundation; either version 2, or (at your option)
|
||
|
any later version.
|
||
|
|
||
|
GNU Classpath is distributed in the hope that it will be useful, but
|
||
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
General Public License for more details.
|
||
|
|
||
|
You should have received a copy of the GNU General Public License
|
||
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
||
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||
|
02110-1301 USA.
|
||
|
|
||
|
Linking this library statically or dynamically with other modules is
|
||
|
making a combined work based on this library. Thus, the terms and
|
||
|
conditions of the GNU General Public License cover the whole
|
||
|
combination.
|
||
|
|
||
|
As a special exception, the copyright holders of this library give you
|
||
|
permission to link this library with independent modules to produce an
|
||
|
executable, regardless of the license terms of these independent
|
||
|
modules, and to copy and distribute the resulting executable under
|
||
|
terms of your choice, provided that you also meet, for each linked
|
||
|
independent module, the terms and conditions of the license of that
|
||
|
module. An independent module is a module which is not derived from
|
||
|
or based on this library. If you modify this library, you may extend
|
||
|
this exception to your version of the library, but you are not
|
||
|
obligated to do so. If you do not wish to do so, delete this
|
||
|
exception statement from your version. */
|
||
|
|
||
|
|
||
|
package javax.imageio.metadata;
|
||
|
|
||
|
/**
|
||
|
* @author Michael Koch (konqueror@gmx.de)
|
||
|
*/
|
||
|
public abstract class IIOMetadata
|
||
|
{
|
||
|
protected IIOMetadataController controller;
|
||
|
protected IIOMetadataController defaultController;
|
||
|
protected String[] extraMetadataFormatClassNames;
|
||
|
protected String[] extraMetadataFormatNames;
|
||
|
protected String nativeMetadataFormatClassName;
|
||
|
protected String nativeMetadataFormatName;
|
||
|
protected boolean standardFormatSupported;
|
||
|
|
||
|
/**
|
||
|
* Creates a <code>IIOMetaData</code> object.
|
||
|
*/
|
||
|
protected IIOMetadata()
|
||
|
{
|
||
|
// Do nothing here.
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Creates a <code>IIOMetaData</code> object with the given arguments.
|
||
|
*
|
||
|
* @param standardMetadataFormatSupported
|
||
|
* @param nativeMetadataFormatName
|
||
|
* @param nativeMetadataFormatClassName
|
||
|
* @param extraMetadataFormatNames
|
||
|
* @param extraMetadataFormatClassNames
|
||
|
*
|
||
|
* @throws IllegalArgumentException if extraMetadataFormatNames has length of
|
||
|
* zero or extraMetadataFormatNames and extraMetadataFormatClassNames are
|
||
|
* neither both null, not have the same length
|
||
|
*/
|
||
|
protected IIOMetadata(boolean standardMetadataFormatSupported,
|
||
|
String nativeMetadataFormatName,
|
||
|
String nativeMetadataFormatClassName,
|
||
|
String[] extraMetadataFormatNames,
|
||
|
String[] extraMetadataFormatClassNames)
|
||
|
{
|
||
|
if (extraMetadataFormatNames != null
|
||
|
&& extraMetadataFormatNames.length == 0)
|
||
|
throw new IllegalArgumentException
|
||
|
("extraMetadataFormatNames may not be empty");
|
||
|
|
||
|
if (((extraMetadataFormatNames == null)
|
||
|
&& (extraMetadataFormatClassNames != null))
|
||
|
|| ((extraMetadataFormatNames != null)
|
||
|
&& (extraMetadataFormatClassNames == null))
|
||
|
|| ((extraMetadataFormatNames != null)
|
||
|
&& (extraMetadataFormatClassNames != null)
|
||
|
&& (extraMetadataFormatNames.length !=
|
||
|
extraMetadataFormatClassNames.length)))
|
||
|
throw new IllegalArgumentException
|
||
|
("extraMetadataFormatNames and extraMetadataFormatClassNames " +
|
||
|
"have different lengths");
|
||
|
|
||
|
this.standardFormatSupported = standardMetadataFormatSupported;
|
||
|
this.nativeMetadataFormatName = nativeMetadataFormatName;
|
||
|
this.nativeMetadataFormatClassName = nativeMetadataFormatClassName;
|
||
|
this.extraMetadataFormatNames = extraMetadataFormatNames;
|
||
|
this.extraMetadataFormatClassNames = extraMetadataFormatClassNames;
|
||
|
}
|
||
|
|
||
|
public boolean activateController()
|
||
|
{
|
||
|
if (! hasController())
|
||
|
return false;
|
||
|
|
||
|
return getDefaultController().activate(this);
|
||
|
}
|
||
|
|
||
|
public IIOMetadataController getController()
|
||
|
{
|
||
|
return controller;
|
||
|
}
|
||
|
|
||
|
public IIOMetadataController getDefaultController()
|
||
|
{
|
||
|
return defaultController;
|
||
|
}
|
||
|
|
||
|
public String[] getExtraMetadataFormatNames()
|
||
|
{
|
||
|
return (String[]) extraMetadataFormatNames.clone();
|
||
|
}
|
||
|
|
||
|
public IIOMetadataFormat getMetadataFormat(String formatName)
|
||
|
{
|
||
|
if (formatName == null)
|
||
|
throw new IllegalArgumentException("formatName may not be null");
|
||
|
|
||
|
String formatClassName = null;
|
||
|
|
||
|
if (isStandardMetadataFormatSupported()
|
||
|
&& formatName.equals(nativeMetadataFormatName))
|
||
|
formatClassName = nativeMetadataFormatClassName;
|
||
|
else
|
||
|
{
|
||
|
String[] extraFormatNames = getExtraMetadataFormatNames();
|
||
|
|
||
|
for (int i = extraFormatNames.length - 1; i >= 0; --i)
|
||
|
if (extraFormatNames[i].equals(formatName))
|
||
|
{
|
||
|
formatClassName = extraFormatNames[i];
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
if (formatClassName == null)
|
||
|
throw new IllegalArgumentException("unknown format");
|
||
|
|
||
|
IIOMetadataFormat format;
|
||
|
|
||
|
try
|
||
|
{
|
||
|
format = (IIOMetadataFormat) Class.forName(formatClassName)
|
||
|
.newInstance();
|
||
|
}
|
||
|
catch (Exception e)
|
||
|
{
|
||
|
IllegalStateException ise = new IllegalStateException();
|
||
|
ise.initCause(e);
|
||
|
throw ise;
|
||
|
}
|
||
|
|
||
|
return format;
|
||
|
}
|
||
|
|
||
|
public String[] getMetadataFormatNames()
|
||
|
{
|
||
|
String[] formatNames = getExtraMetadataFormatNames();
|
||
|
|
||
|
if (isStandardMetadataFormatSupported())
|
||
|
{
|
||
|
// Combine native metadata format name and extra metadata format names
|
||
|
// into one String array.
|
||
|
String[] tmp = new String[formatNames.length + 1];
|
||
|
tmp[0] = getNativeMetadataFormatName();
|
||
|
|
||
|
for (int i = 1; i < tmp.length; ++i)
|
||
|
tmp[i] = formatNames[i - 1];
|
||
|
|
||
|
formatNames = tmp;
|
||
|
}
|
||
|
|
||
|
return formatNames;
|
||
|
}
|
||
|
|
||
|
public String getNativeMetadataFormatName()
|
||
|
{
|
||
|
return nativeMetadataFormatName;
|
||
|
}
|
||
|
|
||
|
public boolean hasController()
|
||
|
{
|
||
|
return getController() != null;
|
||
|
}
|
||
|
|
||
|
public abstract boolean isReadOnly();
|
||
|
|
||
|
public boolean isStandardMetadataFormatSupported()
|
||
|
{
|
||
|
return standardFormatSupported;
|
||
|
}
|
||
|
|
||
|
public abstract void reset();
|
||
|
|
||
|
public void setController(IIOMetadataController controller)
|
||
|
{
|
||
|
this.controller = controller;
|
||
|
}
|
||
|
}
|