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Permazen classes that map Java model classes onto the core API.

There is a newer version: 5.1.0


/*
 * Copyright (C) 2015 Archie L. Cobbs. All rights reserved.
 */

package io.permazen;

import com.google.common.base.Converter;
import com.google.common.base.Preconditions;

import io.permazen.util.ConvertedNavigableMap;

import java.util.NavigableMap;

/**
 * Converts {@link NavigableMap}s into {@link ConvertedNavigableMap}s using the provided element {@link Converter}.
 *
 * @param  key type of converted maps
 * @param  value type of converted maps
 * @param  key type of unconverted (wrapped) maps
 * @param  value type of unconverted (wrapped) maps
 */
class NavigableMapConverter extends Converter, NavigableMap> {

    private final Converter keyConverter;
    private final Converter valueConverter;

    NavigableMapConverter(Converter keyConverter, Converter valueConverter) {
        Preconditions.checkArgument(keyConverter != null, "null keyConverter");
        Preconditions.checkArgument(valueConverter != null, "null valueConverter");
        this.keyConverter = keyConverter;
        this.valueConverter = valueConverter;
    }

    @Override
    protected NavigableMap doForward(NavigableMap map) {
        if (map == null)
            return null;
        return new ConvertedNavigableMap(map, this.keyConverter.reverse(), this.valueConverter.reverse());
    }

    @Override
    protected NavigableMap doBackward(NavigableMap map) {
        if (map == null)
            return null;
        return new ConvertedNavigableMap<>(map, this.keyConverter, this.valueConverter);
    }

// Object

    @Override
    public boolean equals(Object obj) {
        if (obj == this)
            return true;
        if (obj == null || obj.getClass() != this.getClass())
            return false;
        final NavigableMapConverter that = (NavigableMapConverter)obj;
        return this.keyConverter.equals(that.keyConverter) && this.valueConverter.equals(that.valueConverter);
    }

    @Override
    public int hashCode() {
        return this.keyConverter.hashCode() ^ this.valueConverter.hashCode();
    }

    @Override
    public String toString() {
        return this.getClass().getSimpleName() + "[keyConverter=" + this.keyConverter
          + ",valueConverter=" + this.valueConverter + "]";
    }
}