CompressColumnParameter.java

package nom.tam.fits.compression.provider.param.base;

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 * nom.tam FITS library
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 * Copyright (C) 1996 - 2021 nom-tam-fits
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 * distribute this software, either in source code form or as a compiled
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import java.lang.reflect.Array;

import nom.tam.fits.compression.provider.param.api.ICompressColumnParameter;

public abstract class CompressColumnParameter<T, OPTION> extends CompressParameter<OPTION> implements ICompressColumnParameter {

    protected T column;

    private final Class<T> clazz;

    private int size;

    protected CompressColumnParameter<T, OPTION> original;

    protected CompressColumnParameter(String name, OPTION option, Class<T> clazz) {
        super(name, option);
        this.clazz = clazz;
    }

    @Override
    public T column() {
        return this.column;
    }

    @Override
    public void column(Object columnValue, int sizeValue) {
        this.column = this.clazz.cast(columnValue);
        this.size = sizeValue;
    }

    protected final T initializedColumn() {
        if (this.original != null) {
            return this.original.initializedColumn();
        }
        final int arraySize = this.size;
        final Class<T> arrayClass = this.clazz;
        synchronized (this) {
            if (this.column == null) {
                this.column = arrayClass.cast(Array.newInstance(arrayClass.getComponentType(), arraySize));
            }
        }
        return this.column;
    }

    protected final T originalColumn() {
        if (this.original != null) {
            return this.original.originalColumn();
        }
        return this.column;
    }

    public void setOriginal(CompressColumnParameter<T, OPTION> value) {
        this.original = value;
    }
}