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package org.xbib.io.compress.xz;

/**
 * Thrown when the memory usage limit given to the XZ decompressor
 * would be exceeded.
 * The amount of memory required and the memory usage limit are
 * included in the error detail message in human readable format.
 */
public class MemoryLimitException extends XZIOException {
    private static final long serialVersionUID = 3L;

    private final int memoryNeeded;
    private final int memoryLimit;

    /**
     * Creates a new MemoryLimitException.
     * The amount of memory needed and the memory usage limit are
     * included in the error detail message.
     *
     * @param memoryNeeded amount of memory needed as kibibytes (KiB)
     * @param memoryLimit  specified memory usage limit as kibibytes (KiB)
     */
    public MemoryLimitException(int memoryNeeded, int memoryLimit) {
        super("" + memoryNeeded + " KiB of memory would be needed; limit was "
                + memoryLimit + " KiB");

        this.memoryNeeded = memoryNeeded;
        this.memoryLimit = memoryLimit;
    }

    /**
     * Gets how much memory is required to decompress the data.
     *
     * @return amount of memory needed as kibibytes (KiB)
     */
    public int getMemoryNeeded() {
        return memoryNeeded;
    }

    /**
     * Gets what the memory usage limit was at the time the exception
     * was created.
     *
     * @return memory usage limit as kibibytes (KiB)
     */
    public int getMemoryLimit() {
        return memoryLimit;
    }
}