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215
java/org/apache/catalina/tribes/util/Arrays.java
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215
java/org/apache/catalina/tribes/util/Arrays.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.tribes.util;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.StringTokenizer;
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import org.apache.catalina.tribes.ChannelMessage;
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import org.apache.catalina.tribes.Member;
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import org.apache.catalina.tribes.UniqueId;
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import org.apache.catalina.tribes.group.AbsoluteOrder;
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import org.apache.catalina.tribes.membership.Membership;
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/**
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* @version 1.0
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*/
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public class Arrays {
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protected static final StringManager sm = StringManager.getManager(Arrays.class);
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public static boolean contains(byte[] source, int srcoffset, byte[] key, int keyoffset, int length) {
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if ( srcoffset < 0 || srcoffset >= source.length) throw new ArrayIndexOutOfBoundsException(sm.getString("arrays.srcoffset.outOfBounds"));
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if ( keyoffset < 0 || keyoffset >= key.length) throw new ArrayIndexOutOfBoundsException(sm.getString("arrays.keyoffset.outOfBounds"));
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if ( length > (key.length-keyoffset) ) throw new ArrayIndexOutOfBoundsException(sm.getString("arrays.length.outOfBounds"));
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//we don't have enough data to validate it
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if ( length > (source.length-srcoffset) ) return false;
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boolean match = true;
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int pos = keyoffset;
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for ( int i=srcoffset; match && i<length; i++ ) {
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match = (source[i] == key[pos++]);
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}
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return match;
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}
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public static String toString(byte[] data) {
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return toString(data,0,data!=null?data.length:0);
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}
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public static String toString(byte[] data, int offset, int length) {
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return toString(data,offset,length,false);
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}
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public static String toString(byte[] data, int offset, int length, boolean unsigned) {
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StringBuilder buf = new StringBuilder("{");
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if ( data != null && length > 0 ) {
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int i = offset;
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if (unsigned) {
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buf.append(data[i++] & 0xff);
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for (; i < length; i++) {
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buf.append(", ").append(data[i] & 0xff);
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}
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} else {
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buf.append(data[i++]);
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for (; i < length; i++) {
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buf.append(", ").append(data[i]);
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}
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}
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}
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buf.append("}");
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return buf.toString();
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}
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public static String toString(Object[] data) {
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return toString(data,0,data!=null?data.length:0);
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}
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public static String toString(Object[] data, int offset, int length) {
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StringBuilder buf = new StringBuilder("{");
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if ( data != null && length > 0 ) {
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buf.append(data[offset++]);
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for (int i = offset; i < length; i++) {
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buf.append(", ").append(data[i]);
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}
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}
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buf.append("}");
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return buf.toString();
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}
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public static String toNameString(Member[] data) {
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return toNameString(data,0,data!=null?data.length:0);
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}
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public static String toNameString(Member[] data, int offset, int length) {
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StringBuilder buf = new StringBuilder("{");
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if ( data != null && length > 0 ) {
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buf.append(data[offset++].getName());
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for (int i = offset; i < length; i++) {
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buf.append(", ").append(data[i].getName());
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}
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}
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buf.append("}");
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return buf.toString();
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}
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public static int add(int[] data) {
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int result = 0;
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for (int i=0;i<data.length; i++ ) result += data[i];
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return result;
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}
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public static UniqueId getUniqudId(ChannelMessage msg) {
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return new UniqueId(msg.getUniqueId());
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}
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public static UniqueId getUniqudId(byte[] data) {
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return new UniqueId(data);
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}
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public static boolean equals(byte[] o1, byte[] o2) {
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return java.util.Arrays.equals(o1,o2);
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}
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public static boolean equals(Object[] o1, Object[] o2) {
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boolean result = o1.length == o2.length;
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if ( result ) for (int i=0; i<o1.length && result; i++ ) result = o1[i].equals(o2[i]);
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return result;
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}
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public static boolean sameMembers(Member[] m1, Member[] m2) {
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AbsoluteOrder.absoluteOrder(m1);
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AbsoluteOrder.absoluteOrder(m2);
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return equals(m1,m2);
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}
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public static Member[] merge(Member[] m1, Member[] m2) {
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AbsoluteOrder.absoluteOrder(m1);
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AbsoluteOrder.absoluteOrder(m2);
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ArrayList<Member> list = new ArrayList<>(java.util.Arrays.asList(m1));
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for (int i=0; i<m2.length; i++) if ( !list.contains(m2[i]) ) list.add(m2[i]);
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Member[] result = new Member[list.size()];
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list.toArray(result);
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AbsoluteOrder.absoluteOrder(result);
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return result;
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}
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public static void fill(Membership mbrship, Member[] m) {
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for (int i=0; i<m.length; i++ ) mbrship.addMember(m[i]);
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}
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public static Member[] diff(Membership complete, Membership local, Member ignore) {
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ArrayList<Member> result = new ArrayList<>();
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Member[] comp = complete.getMembers();
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for ( int i=0; i<comp.length; i++ ) {
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if ( ignore!=null && ignore.equals(comp[i]) ) continue;
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if ( local.getMember(comp[i]) == null ) result.add(comp[i]);
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}
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return result.toArray(new Member[result.size()]);
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}
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public static Member[] remove(Member[] all, Member remove) {
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return extract(all,new Member[] {remove});
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}
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public static Member[] extract(Member[] all, Member[] remove) {
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List<Member> alist = java.util.Arrays.asList(all);
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ArrayList<Member> list = new ArrayList<>(alist);
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for (int i=0; i<remove.length; i++ ) list.remove(remove[i]);
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return list.toArray(new Member[list.size()]);
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}
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public static int indexOf(Member member, Member[] members) {
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int result = -1;
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for (int i=0; (result==-1) && (i<members.length); i++ )
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if ( member.equals(members[i]) ) result = i;
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return result;
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}
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public static int nextIndex(Member member, Member[] members) {
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int idx = indexOf(member,members)+1;
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if (idx >= members.length ) idx = ((members.length>0)?0:-1);
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return idx;
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}
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public static int hashCode(byte a[]) {
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if (a == null)
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return 0;
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int result = 1;
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for (int i=0; i<a.length; i++) {
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byte element = a[i];
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result = 31 * result + element;
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}
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return result;
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}
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public static byte[] fromString(String value) {
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if ( value == null ) return null;
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if ( !value.startsWith("{") ) throw new RuntimeException(sm.getString("arrays.malformed.arrays"));
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StringTokenizer t = new StringTokenizer(value,"{,}",false);
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byte[] result = new byte[t.countTokens()];
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for (int i=0; i<result.length; i++ ) result[i] = Byte.parseByte(t.nextToken());
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return result;
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}
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public static byte[] convert(String s) {
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return s.getBytes(StandardCharsets.ISO_8859_1);
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}
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}
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