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	/*
	* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package javax.xml.catalog;

	import java.net.URL;

	/**
	* Represents a rewriteSystem entry.
	*
	* @since 9
	*/
	final class RewriteSystem extends BaseEntry {
	String systemIdStartString;
	URL rewritePrefix;

	/**
	* Construct a rewriteSystem entry.
	*
	* @param systemIdStartString The systemIdStartString attribute.
	* @param rewritePrefix The rewritePrefix attribute.
	*/
	public RewriteSystem(String base, String systemIdStartString, String rewritePrefix) {
	super(CatalogEntryType.REWRITESYSTEM, base);
	setSystemIdStartString (systemIdStartString);
	setRewritePrefix(rewritePrefix);
	}

	/**
	* Set the systemIdStartString attribute.
	* @param systemIdStartString The systemIdStartString attribute value.
	*/
	public void setSystemIdStartString (String systemIdStartString) {
	CatalogMessages.reportNPEOnNull("systemIdStartString", systemIdStartString);
	this.systemIdStartString = Normalizer.normalizeURI(systemIdStartString);
	}

	/**
	* Set the rewritePrefix attribute. If the value of the rewritePrefix attribute
	* is relative, it must be made absolute with respect to the base URI currently in effect.
	* @param rewritePrefix The rewritePrefix attribute value.
	*/
	public void setRewritePrefix(String rewritePrefix) {
	this.rewritePrefix = verifyURI("setRewritePrefix", baseURI, rewritePrefix);
	}

	/**
	* Get the systemIdStartString attribute.
	* @return The systemIdStartString
	*/
	public String getSystemIdStartString () {
	return systemIdStartString;
	}

	/**
	* Get the rewritePrefix attribute.
	* @return The rewritePrefix attribute value.
	*/
	public URL getRewritePrefix() {
	return rewritePrefix;
	}

	/**
	* Try to match the specified systemId with the entry. Return the match if it
	* is successful and the length of the systemIdStartString is longer than the
	* longest of any previous match.
	*
	* @param systemId The systemId to be matched.
	* @param currentMatch The length of systemIdStartString of previous match if any.
	* @return The replacement URI if the match is successful, null if not.
	*/
	public String match(String systemId, int currentMatch) {
	if (systemIdStartString.length() < systemId.length() &&
	systemIdStartString.equals(systemId.substring(0, systemIdStartString.length()))) {
	if (currentMatch < systemIdStartString.length()) {
	String prefix = rewritePrefix.toExternalForm();
	String sysId;
	if (systemIdStartString.endsWith(SLASH)) {
	sysId = systemId.substring(systemIdStartString.length());
	} else {
	sysId = systemId.substring(systemIdStartString.length() + 1);
	}
	if (prefix.endsWith(SLASH)) {
	return prefix + sysId;
	} else {
	return prefix + SLASH + sysId;
	}
	}
	}
	return null;
	}

	/**
	* Try to match the specified systemId with the entry.
	*
	* @param systemId The systemId to be matched.
	* @return The replacement URI if the match is successful, null if not.
	*/
	@Override
	public String match(String systemId) {
	return match(systemId, 0);
	}
	}

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