dexlib2/src/main/java/org/jf/dexlib2/writer/pool/BaseIndexPool.java

/*
 * Copyright 2013, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 */

package org.jf.dexlib2.writer.pool;

import com.google.common.collect.Maps;
import org.jf.dexlib2.writer.IndexSection;
import org.jf.util.ExceptionWithContext;

import javax.annotation.Nonnull;
import java.util.Collection;
import java.util.Map;

public abstract class BaseIndexPool<Key> implements IndexSection<Key> {
    @Nonnull protected final Map<Key, Integer> internedItems = Maps.newHashMap();

    @Nonnull @Override public Collection<? extends Map.Entry<? extends Key, Integer>> getItems() {
        return internedItems.entrySet();
    }

    @Override public int getItemIndex(@Nonnull Key key) {
        Integer index = internedItems.get(key);
        if (index == null) {
            throw new ExceptionWithContext("Item not found.: %s", getItemString(key));
        }
        return index;
    }

    @Nonnull protected String getItemString(@Nonnull Key key) {
        return key.toString();
    }
}