111 lines
4.1 KiB
Java
111 lines
4.1 KiB
Java
/*
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* Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.util;
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import static java.nio.charset.StandardCharsets.ISO_8859_1;
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import java.nio.ByteBuffer;
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import java.nio.CharBuffer;
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import java.nio.charset.Charset;
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import java.nio.charset.CharsetDecoder;
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import java.nio.charset.CharsetEncoder;
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import java.nio.charset.CoderResult;
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import java.nio.charset.CodingErrorAction;
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import java.nio.charset.StandardCharsets;
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import java.util.Objects;
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/**
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* A Charset implementation for reading PropertyResourceBundle, in order
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* for loading properties files. This first tries to load the properties
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* file with UTF-8 encoding). If it fails, then load the file with ISO-8859-1
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*/
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public class PropertyResourceBundleCharset extends Charset {
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private boolean strictUTF8 = false;
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public PropertyResourceBundleCharset(boolean strictUTF8) {
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this(PropertyResourceBundleCharset.class.getCanonicalName(), null);
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this.strictUTF8 = strictUTF8;
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}
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public PropertyResourceBundleCharset(String canonicalName, String[] aliases) {
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super(canonicalName, aliases);
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}
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@Override
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public boolean contains(Charset cs) {
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return false;
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}
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@Override
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public CharsetDecoder newDecoder() {
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return new PropertiesFileDecoder(this, 1.0f, 1.0f);
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}
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@Override
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public CharsetEncoder newEncoder() {
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throw new UnsupportedOperationException("Encoding is not supported");
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}
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private final class PropertiesFileDecoder extends CharsetDecoder {
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// Android-changed: use StandardCharsets.
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// private CharsetDecoder cdUTF_8 = UTF_8.INSTANCE.newDecoder()
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private CharsetDecoder cdUTF_8 = StandardCharsets.UTF_8.newDecoder()
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.onMalformedInput(CodingErrorAction.REPORT)
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.onUnmappableCharacter(CodingErrorAction.REPORT);
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private CharsetDecoder cdISO_8859_1 = null;
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protected PropertiesFileDecoder(Charset cs,
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float averageCharsPerByte, float maxCharsPerByte) {
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super(cs, averageCharsPerByte, maxCharsPerByte);
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}
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protected CoderResult decodeLoop(ByteBuffer in, CharBuffer out) {
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if (Objects.nonNull(cdISO_8859_1)) {
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return cdISO_8859_1.decode(in, out, false);
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}
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in.mark();
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out.mark();
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CoderResult cr = cdUTF_8.decode(in, out, false);
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if (cr.isUnderflow() || cr.isOverflow() ||
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PropertyResourceBundleCharset.this.strictUTF8) {
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return cr;
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}
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// Invalid or unmappable UTF-8 sequence detected.
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// Switching to the ISO 8859-1 decorder.
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assert cr.isMalformed() || cr.isUnmappable();
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in.reset();
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out.reset();
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// Android-changed: use StandardCharsets.
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// cdISO_8859_1 = ISO_8859_1.INSTANCE.newDecoder();
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cdISO_8859_1 = ISO_8859_1.newDecoder();
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return cdISO_8859_1.decode(in, out, false);
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}
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}
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}
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