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/*******************************************************************************
* Copyright (c) 2011, 2013 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
*******************************************************************************/
package org.eclipse.equinox.metatype.impl;
import java.io.IOException;
import java.util.*;
import java.util.Map.Entry;
import org.eclipse.equinox.metatype.Extendable;
import org.eclipse.equinox.metatype.impl.Persistence.Reader;
import org.eclipse.equinox.metatype.impl.Persistence.Writer;
public class ExtendableHelper implements Extendable {
private final Map<String, Map<String, String>> extensions;
public ExtendableHelper() {
this(Collections.<String, Map<String, String>> emptyMap());
}
public ExtendableHelper(Map<String, Map<String, String>> extensions) {
if (extensions == null)
throw new NullPointerException();
this.extensions = extensions;
}
@Override
public Map<String, String> getExtensionAttributes(String schema) {
return Collections.unmodifiableMap(extensions.get(schema));
}
@Override
public Set<String> getExtensionUris() {
return Collections.unmodifiableSet(extensions.keySet());
}
void getStrings(Set<String> strings) {
for (Entry<String, Map<String, String>> e1 : extensions.entrySet()) {
strings.add(e1.getKey());
for (Entry<String, String> e2 : e1.getValue().entrySet()) {
strings.add(e2.getKey());
strings.add(e2.getValue());
}
}
}
public static ExtendableHelper load(Reader reader) throws IOException {
Map<String, Map<String, String>> extensions = new HashMap<>();
int numExtensions = reader.readInt();
for (int i = 0; i < numExtensions; i++) {
String extKey = reader.readString();
int numAttrs = reader.readInt();
Map<String, String> extensionAttrs = new HashMap<>();
for (int j = 0; j < numAttrs; j++) {
String attrKey = reader.readString();
String attrValue = reader.readString();
extensionAttrs.put(attrKey, attrValue);
}
extensions.put(extKey, extensionAttrs);
}
return new ExtendableHelper(extensions);
}
public void write(Writer writer) throws IOException {
writer.writeInt(extensions.size());
for (Entry<String, Map<String, String>> extensionEntry : extensions.entrySet()) {
writer.writeString(extensionEntry.getKey());
Map<String, String> extensionAttrs = extensionEntry.getValue();
writer.writeInt(extensionAttrs.size());
for (Entry<String, String> attrs : extensionAttrs.entrySet()) {
writer.writeString(attrs.getKey());
writer.writeString(attrs.getValue());
}
}
}
}
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