com.google.idea.blaze.base.model.SyncState.java Source code

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Here is the source code for com.google.idea.blaze.base.model.SyncState.java

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/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * 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.google.idea.blaze.base.model;

import com.google.common.collect.ImmutableMap;
import java.io.Serializable;
import java.util.Map;
import javax.annotation.Nullable;

/** Used to save arbitrary state with the sync task. */
public class SyncState implements Serializable {
    private static final long serialVersionUID = 1L;
    private final ImmutableMap<String, Serializable> syncStateMap;

    @SuppressWarnings("unchecked")
    @Nullable
    public <T extends Serializable> T get(Class<T> klass) {
        return (T) syncStateMap.get(klass.getName());
    }

    /** Builder for a sync state */
    public static class Builder {
        ImmutableMap.Builder<Class, Serializable> syncStateMap = ImmutableMap.builder();

        public <K extends Serializable, V extends K> Builder put(Class<K> klass, V instance) {
            syncStateMap.put(klass, instance);
            return this;
        }

        public SyncState build() {
            return new SyncState(syncStateMap.build());
        }
    }

    SyncState(ImmutableMap<Class, Serializable> syncStateMap) {
        ImmutableMap.Builder<String, Serializable> extraProjectSyncStateMap = ImmutableMap.builder();
        for (Map.Entry<Class, Serializable> entry : syncStateMap.entrySet()) {
            extraProjectSyncStateMap.put(entry.getKey().getName(), entry.getValue());
        }
        this.syncStateMap = extraProjectSyncStateMap.build();
    }
}