/*******************************************************************************
* Copyright (c) 2003, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.pde.internal.ui.editor.plugin;
import org.eclipse.core.runtime.Assert;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.pde.internal.ui.PDEPlugin;
import org.eclipse.ui.dialogs.ISelectionStatusValidator;
/**
* Implementation of a <code>ISelectionValidator</code> to validate the
* type of an element.
* Empty selections are not accepted.
*/
public class JarSelectionValidator implements ISelectionStatusValidator {
private Class[] fAcceptedTypes;
private boolean fAllowMultipleSelection;
/**
* @param acceptedTypes The types accepted by the validator
* @param allowMultipleSelection If set to <code>true</code>, the validator
* allows multiple selection.
*/
public JarSelectionValidator(Class[] acceptedTypes, boolean allowMultipleSelection) {
Assert.isNotNull(acceptedTypes);
fAcceptedTypes= acceptedTypes;
fAllowMultipleSelection= allowMultipleSelection;
}
/*
* @see org.eclipse.ui.dialogs.ISelectionValidator#isValid(java.lang.Object)
*/
public IStatus validate(Object[] elements) {
if (isValidSelection(elements)) {
return new Status(
IStatus.OK,
PDEPlugin.getPluginId(),
IStatus.OK,
"", //$NON-NLS-1$
null);
}
return new Status(
IStatus.ERROR,
PDEPlugin.getPluginId(),
IStatus.ERROR,
"", //$NON-NLS-1$
null);
}
private boolean isValidSelection(Object[] selection) {
if (selection.length == 0) {
return false;
}
if (!fAllowMultipleSelection && selection.length != 1) {
return false;
}
for (int i= 0; i < selection.length; i++) {
Object o= selection[i];
if (!isValid(o)) {
return false;
}
}
return true;
}
public boolean isValid(Object element) {
for (int i= 0; i < fAcceptedTypes.length; i++) {
if (fAcceptedTypes[i].isInstance(element)) {
return true;
}
}
return false;
}
}
|