/*
* Copyright 2016-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package com.facebook.buck.util;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableMap;
import java.util.Map;
public class ProcessExecutorSerializer {
private static final String TYPE = "type";
private static final String TYPE_DEFAULT = "default";
private static final String TYPE_CONTEXTUAL = "contextual";
private static final String CONTEXT = "context";
private static final String DELEGATE = "delegate";
private ProcessExecutorSerializer() {}
public static ImmutableMap<String, Object> serialize(ProcessExecutor executor) {
ImmutableMap.Builder<String, Object> builder = ImmutableMap.builder();
if (executor instanceof DefaultProcessExecutor) {
builder.put(TYPE, TYPE_DEFAULT);
} else if (executor instanceof ContextualProcessExecutor) {
builder.put(TYPE, TYPE_CONTEXTUAL);
ContextualProcessExecutor contextualProcessExecutor = (ContextualProcessExecutor) executor;
builder.put(CONTEXT, contextualProcessExecutor.getContext());
builder.put(DELEGATE, serialize(contextualProcessExecutor.getDelegate()));
} else {
throw new RuntimeException(
String.format("Cannot serialize ProcessExecutor with class %s", executor.getClass()));
}
return builder.build();
}
@SuppressWarnings("unchecked")
public static ProcessExecutor deserialize(Map<String, Object> data, Console console) {
String type = (String) data.get(TYPE);
Preconditions.checkNotNull(type, "Cannot deserialize without `%s` field", TYPE);
if (TYPE_DEFAULT.equals(type)) {
return new DefaultProcessExecutor(console);
} else if (TYPE_CONTEXTUAL.equals(type)) {
Map<String, Object> delegateData = (Map<String, Object>) data.get(DELEGATE);
Preconditions.checkNotNull(
delegateData,
"Expected to find serialized data for delegate of the ContextualProcessExecutor");
Map<String, String> context = (Map<String, String>) data.get(CONTEXT);
Preconditions.checkNotNull(context, "Expected to find context for ContextualProcessExecutor");
return new ContextualProcessExecutor(
deserialize(delegateData, console), ImmutableMap.copyOf(context));
} else {
throw new RuntimeException(
String.format("Cannot serialize ProcessExecutor with type %s", type));
}
}
}