Fork QueryableArray from P2

tycho-core/src/main/java/org/eclipse/tycho/p2tools/copiedfromp2/QueryableArray.java

@@ -0,0 +1,83 @@
+/*******************************************************************************
+ * Copyright (c) 2008, 2023 IBM Corporation and others.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     IBM Corporation - initial API and implementation
+ *     Cloudsmith Inc. - query indexes
+ *******************************************************************************/
+package org.eclipse.tycho.p2tools.copiedfromp2;
+
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+
+import org.eclipse.equinox.internal.p2.core.helpers.CollectionUtils;
+import org.eclipse.equinox.internal.p2.metadata.InstallableUnit;
+import org.eclipse.equinox.internal.p2.metadata.TranslationSupport;
+import org.eclipse.equinox.internal.p2.metadata.index.CapabilityIndex;
+import org.eclipse.equinox.internal.p2.metadata.index.IdIndex;
+import org.eclipse.equinox.internal.p2.metadata.index.IndexProvider;
+import org.eclipse.equinox.p2.metadata.IInstallableUnit;
+import org.eclipse.equinox.p2.metadata.KeyWithLocale;
+import org.eclipse.equinox.p2.metadata.index.IIndex;
+
+public class QueryableArray extends IndexProvider<IInstallableUnit> {
+    private final List<IInstallableUnit> dataSet;
+    private IIndex<IInstallableUnit> capabilityIndex;
+    private IIndex<IInstallableUnit> idIndex;
+    private TranslationSupport translationSupport;
+
+    public QueryableArray(IInstallableUnit[] ius) {
+        dataSet = CollectionUtils.unmodifiableList(ius);
+    }
+
+    public QueryableArray(Collection<IInstallableUnit> ius) {
+        dataSet = List.copyOf(ius);
+    }
+
+    @Override
+    public Iterator<IInstallableUnit> everything() {
+        return dataSet.iterator();
+    }
+
+    @Override
+    public boolean contains(IInstallableUnit element) {
+        return dataSet.contains(element);
+    }
+
+    @Override
+    public synchronized IIndex<IInstallableUnit> getIndex(String memberName) {
+        if (InstallableUnit.MEMBER_PROVIDED_CAPABILITIES.equals(memberName)) {
+            if (capabilityIndex == null)
+                capabilityIndex = new CapabilityIndex(dataSet.iterator());
+            return capabilityIndex;
+        }
+        if (InstallableUnit.MEMBER_ID.equals(memberName)) {
+            if (idIndex == null)
+                idIndex = new IdIndex(dataSet.iterator());
+            return idIndex;
+        }
+        return null;
+    }
+
+    @Override
+    public synchronized Object getManagedProperty(Object client, String memberName, Object key) {
+        if (!(client instanceof IInstallableUnit))
+            return null;
+        IInstallableUnit iu = (IInstallableUnit) client;
+        if (InstallableUnit.MEMBER_TRANSLATED_PROPERTIES.equals(memberName)) {
+            if (translationSupport == null)
+                translationSupport = new TranslationSupport(this);
+            return key instanceof KeyWithLocale ? translationSupport.getIUProperty(iu, (KeyWithLocale) key)
+                    : translationSupport.getIUProperty(iu, key.toString());
+        }
+        return null;
+    }
+}