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package org.apache.juneau.svl;

import static org.apache.juneau.internal.StringUtils.*;

/**
 * Interface for the resolution of vars that consist of a comma-delimited list.
 *
 * <h5 class='figure'>Example:</h5>
 * <p class='bjava'>
 * 	<js>"$X{foo, bar, baz}"</js>
 * </p>
 *
 * <ul class='seealso'>
 * 	<li class='link'>{@doc jm.SimpleVariableLanguage}
 * 	<li class='extlink'>{@source}
 * </ul>
 */
public abstract class MultipartVar extends SimpleVar {

	/**
	 * Constructor.
	 *
	 * @param name The name of this variable.
	 */
	public MultipartVar(String name) {
		super(name);
	}

	/**
	 * The interface that needs to be implemented for this interface.
	 *
	 * @param session The session object used for a single instance of a string resolution.
	 * @param args The arguments inside the variable.
	 * @return The resolved variable.
	 */
	public abstract String resolve(VarResolverSession session, String[] args);

	@Override /* Var */
	public String resolve(VarResolverSession session, String s) {
		String[] s2 = s.indexOf(',') == -1 ? new String[]{s.trim()} : split(s);
		return resolve(session, s2);
	}
}
