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package com.sun.enterprise.deploy.shared;

import org.glassfish.api.deployment.archive.ReadableArchive;
import java.util.Map;
import java.util.HashMap;

/**
 * Common methods for ReadableArchive implementations
 */
public abstract class AbstractReadableArchive implements ReadableArchive {
    protected ReadableArchive parentArchive;
    protected Map<Class<?>, Object> extraData=new HashMap<Class<?>, Object>();

    /**
     * set the parent archive for this archive
     *
     * @param parentArchive the parent archive
     */
    public void setParentArchive(ReadableArchive parentArchive) {
        this.parentArchive = parentArchive;
    }

    /**
     * get the parent archive of this archive
     *
     * @return the parent archive
     */
    public ReadableArchive getParentArchive() {
        return parentArchive;
    }

    /**
     * Returns any data that could have been calculated as part of
     * the descriptor loading.
     *
     * @param dataType the type of the extra data
     * @return the extra data or null if there are not an instance of
     * type dataType registered.
     */
    public synchronized <U> U getExtraData(Class<U> dataType) {
        return dataType.cast(extraData.get(dataType));
    }

    public synchronized <U> void setExtraData(Class<U> dataType, U instance) {
        extraData.put(dataType, instance);
    }

    public synchronized <U> void removeExtraData(Class<U> dataType) {
        extraData.remove(dataType);
    }
}