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/**
 * Copyright (c) 2016-2022 Deephaven Data Labs and Patent Pending
 */
package io.deephaven.engine.table.impl.util.unboxer;

import io.deephaven.chunk.*;
import io.deephaven.chunk.attributes.Values;
import io.deephaven.util.type.TypeUtils;

class CharUnboxer implements ChunkUnboxer.UnboxerKernel {
    private final WritableCharChunk primitiveChunk;

    CharUnboxer(int capacity) {
        primitiveChunk = WritableCharChunk.makeWritableChunk(capacity);
    }

    @Override
    public void close() {
        primitiveChunk.close();
    }

    @Override
    public CharChunk unbox(ObjectChunk boxed) {
        unboxTo(boxed, primitiveChunk, 0, 0);
        primitiveChunk.setSize(boxed.size());
        return primitiveChunk;
    }

    @Override
    public void unboxTo(ObjectChunk boxed, WritableChunk primitives, int sourceOffset, int destOffset) {
        unboxTo(boxed, primitives.asWritableCharChunk(), sourceOffset, destOffset);
    }

    public static void unboxTo(ObjectChunk boxed, WritableCharChunk primitives, int sourceOffset, int destOffset) {
        final ObjectChunk charChunk = boxed.asObjectChunk();
        for (int ii = 0; ii < boxed.size(); ++ii) {
            primitives.set(ii + destOffset, TypeUtils.unbox(charChunk.get(ii + sourceOffset)));
        }
    }
}