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package atom.content.pm;

import atom.app.Activity;
import atom.content.Intent;

import javax.xml.bind.annotation.XmlAttribute;
import java.util.Objects;

/**
 * Information you can retrieve about a particular application activity or
 * receiver. This corresponds to information collected from the MANIFEST.MF.
 *
 * @author Alex Voloshyn
 * @author Serge Voloshyn
 * @version 1.11 1/15/15
 */
public final class ActivityInfo extends AbstractInfo {
    /**
     * Error message for defined layer index that doesn't present in the system.
     */
    private static final String MSG_LAYER_ILLEGAL =
            "Defined layer index '%d' doesn't present in the system.";
    /**
     * Activity target layer.
     */
    private int layer = Intent.LAYER_DEFAULT;

    /**
     * Set an activity' layer index.
     *
     * @param aLayer new activity' layer index
     */
    public void setLayer(final int aLayer) {
        if (aLayer < 0 || aLayer >= Intent.LAYER_MAX_COUNT) {
            throw new IllegalArgumentException(String.format(
                    MSG_LAYER_ILLEGAL, aLayer));
        }
        layer = aLayer;
    }

    /**
     * Get activity' layer index.
     *
     * @return activity' layer index
     */
    @XmlAttribute(name = "layer")
    public int getLayer() {
        return layer;
    }

    @Override
    public boolean equals(final Object object) {
        boolean areEquals;
        if (this == object) {
            areEquals = true;
        } else {
            if (object instanceof ActivityInfo) {
                final ActivityInfo that = (ActivityInfo) object;
                areEquals = super.equals(that);
            } else {
                areEquals = false;
            }
        }
        return areEquals;
    }

    @Override
    public int hashCode() {
        return Objects.hash(getClassName());
    }

    @Override
    public String toString() {
        final String packageName;
        if (getPackageInfo() == null) {
            packageName = null;
        } else {
            packageName = getPackageInfo().getName();
        }
        return String.format(
                "ActivityInfo { class='%s', package='%s', layer='%d' }",
                getClassName(), packageName, layer);
    }
}