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/*******************************************************************************
* Copyright (c) 2010, 2013 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.osgi.internal.weaving;
import java.util.*;
import org.eclipse.osgi.util.ManifestElement;
import org.osgi.framework.Constants;
import org.osgi.framework.PackagePermission;
/**
* A list of DynamicImport-Package statements that are to be used for adding new
* dynamic imports to a bundle class loader.
*
*/
public class DynamicImportList extends AbstractList<String> implements RandomAccess {
// the collection of valid DynamicImport-Package statments.
private final List<String> imports = new ArrayList<String>(0);
private final WovenClassImpl wovenClass;
public DynamicImportList(WovenClassImpl wovenClass) {
super();
this.wovenClass = wovenClass;
}
@Override
public String get(int index) {
return imports.get(index);
}
@Override
public int size() {
return imports.size();
}
@Override
public String set(int index, String element) {
wovenClass.checkPermission();
validateSyntaxAndCheckPackagePermission(element);
return imports.set(index, element);
}
@Override
public void add(int index, String element) {
wovenClass.checkPermission();
validateSyntaxAndCheckPackagePermission(element);
imports.add(index, element);
}
@Override
public String remove(int index) {
wovenClass.checkPermission();
return imports.remove(index);
}
private void validateSyntaxAndCheckPackagePermission(String dynamicImportPackageDescription) {
ManifestElement[] clauses;
// Validate the syntax of imports that are added.
try {
clauses = ManifestElement.parseHeader(Constants.IMPORT_PACKAGE, dynamicImportPackageDescription);
} catch (Exception e) {
throw new IllegalArgumentException(e);
}
SecurityManager sm = System.getSecurityManager();
if (sm == null)
return;
// Security is enabled. Ensure the weaver has import package permission
// for each dynamic import added.
for (ManifestElement clause : clauses)
for (String pkg : clause.getValueComponents())
sm.checkPermission(new PackagePermission(pkg, PackagePermission.IMPORT));
}
}
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