diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/NioZipEncoding.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/NioZipEncoding.java | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/NioZipEncoding.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/NioZipEncoding.java new file mode 100644 index 00000000..63d33ff5 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/zip/NioZipEncoding.java @@ -0,0 +1,122 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, + * software distributed under the License is distributed on an + * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY + * KIND, either express or implied. See the License for the + * specific language governing permissions and limitations + * under the License. + */ + +package org.apache.tools.zip; + +import java.io.IOException; +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.Charset; +import java.nio.charset.CharsetEncoder; +import java.nio.charset.CoderResult; +import java.nio.charset.CodingErrorAction; + +/** + * A ZipEncoding, which uses a java.nio {@link + * java.nio.charset.Charset Charset} to encode names. + * + * <p>This implementation works for all cases under java-1.5 or + * later. However, in java-1.4, some charsets don't have a java.nio + * implementation, most notably the default ZIP encoding Cp437.</p> + * + * <p>The methods of this class are reentrant.</p> + */ +class NioZipEncoding implements ZipEncoding { + private final Charset charset; + + /** + * Construct an NIO based zip encoding, which wraps the given + * charset. + * + * @param charset The NIO charset to wrap. + */ + public NioZipEncoding(final Charset charset) { + this.charset = charset; + } + + /** + * @see + * org.apache.tools.zip.ZipEncoding#canEncode(java.lang.String) + */ + public boolean canEncode(final String name) { + final CharsetEncoder enc = this.charset.newEncoder(); + enc.onMalformedInput(CodingErrorAction.REPORT); + enc.onUnmappableCharacter(CodingErrorAction.REPORT); + + return enc.canEncode(name); + } + + /** + * @see + * org.apache.tools.zip.ZipEncoding#encode(java.lang.String) + */ + public ByteBuffer encode(final String name) { + final CharsetEncoder enc = this.charset.newEncoder(); + + enc.onMalformedInput(CodingErrorAction.REPORT); + enc.onUnmappableCharacter(CodingErrorAction.REPORT); + + final CharBuffer cb = CharBuffer.wrap(name); + ByteBuffer out = ByteBuffer.allocate(name.length() + + (name.length() + 1) / 2); + + while (cb.remaining() > 0) { + final CoderResult res = enc.encode(cb, out,true); + + if (res.isUnmappable() || res.isMalformed()) { + + // write the unmappable characters in utf-16 + // pseudo-URL encoding style to ByteBuffer. + if (res.length() * 6 > out.remaining()) { + out = ZipEncodingHelper.growBuffer(out, out.position() + + res.length() * 6); + } + + for (int i=0; i<res.length(); ++i) { + ZipEncodingHelper.appendSurrogate(out,cb.get()); + } + + } else if (res.isOverflow()) { + + out = ZipEncodingHelper.growBuffer(out, 0); + + } else if (res.isUnderflow()) { + + enc.flush(out); + break; + + } + } + + out.limit(out.position()); + out.rewind(); + return out; + } + + /** + * @see + * org.apache.tools.zip.ZipEncoding#decode(byte[]) + */ + public String decode(final byte[] data) throws IOException { + return this.charset.newDecoder() + .onMalformedInput(CodingErrorAction.REPORT) + .onUnmappableCharacter(CodingErrorAction.REPORT) + .decode(ByteBuffer.wrap(data)).toString(); + } +} |