diff options
author | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2010-10-18 02:24:55 +0000 |
---|---|---|
committer | lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68> | 2010-10-18 02:24:55 +0000 |
commit | 4f9328953ea16c7a42eb1910f1e809bf1c537d3b (patch) | |
tree | 2f989a5045456d2057540563a483465a1d490dc0 /sca-java-2.x/tags/2.0-M5.1/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/XMLDocumentHelper.java | |
parent | 41c3e83fe3990eff86b40f775c5d02c5177ae005 (diff) |
Copy 2.0-M5.1-RC2 tag as 2.0-M5.1 official release tag
git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1023626 13f79535-47bb-0310-9956-ffa450edef68
Diffstat (limited to '')
-rw-r--r-- | sca-java-2.x/tags/2.0-M5.1/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/XMLDocumentHelper.java | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/sca-java-2.x/tags/2.0-M5.1/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/XMLDocumentHelper.java b/sca-java-2.x/tags/2.0-M5.1/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/XMLDocumentHelper.java new file mode 100644 index 0000000000..3bc24f8939 --- /dev/null +++ b/sca-java-2.x/tags/2.0-M5.1/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/XMLDocumentHelper.java @@ -0,0 +1,153 @@ +/* + * 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.tuscany.sca.common.xml; + +import java.io.BufferedInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.io.UnsupportedEncodingException; +import java.net.JarURLConnection; +import java.net.URL; +import java.net.URLConnection; + +import org.xml.sax.InputSource; + +/** + * @version $Rev$ $Date$] + * @tuscany.spi.extension.asclient + */ +public class XMLDocumentHelper { + protected static final int BUFFER_SIZE = 256; + + /** + * Detect the XML encoding of the document + * + * @param is The input stream + * @return The encoding + * @throws IOException + */ + public static String getEncoding(InputStream is) throws IOException { + if (!is.markSupported()) + is = new BufferedInputStream(is); + + byte[] buffer = readBuffer(is); + return getXMLEncoding(buffer); + } + + /** + * Searches the array of bytes to determine the XML encoding. + */ + protected static String getXMLEncoding(byte[] bytes) { + String javaEncoding = null; + + if (bytes.length >= 4) { + if (((bytes[0] == -2) && (bytes[1] == -1)) || ((bytes[0] == 0) && (bytes[1] == 60))) + javaEncoding = "UnicodeBig"; + else if (((bytes[0] == -1) && (bytes[1] == -2)) || ((bytes[0] == 60) && (bytes[1] == 0))) + javaEncoding = "UnicodeLittle"; + else if ((bytes[0] == -17) && (bytes[1] == -69) && (bytes[2] == -65)) + javaEncoding = "UTF8"; + } + + String header = null; + + try { + if (javaEncoding != null) + header = new String(bytes, 0, bytes.length, javaEncoding); + else + header = new String(bytes, 0, bytes.length); + } catch (UnsupportedEncodingException e) { + return null; + } + + if (!header.startsWith("<?xml")) + return "UTF-8"; + + int endOfXMLPI = header.indexOf("?>"); + int encodingIndex = header.indexOf("encoding", 6); + + if ((encodingIndex == -1) || (encodingIndex > endOfXMLPI)) + return "UTF-8"; + + int firstQuoteIndex = header.indexOf("\"", encodingIndex); + int lastQuoteIndex; + + if ((firstQuoteIndex == -1) || (firstQuoteIndex > endOfXMLPI)) { + firstQuoteIndex = header.indexOf("'", encodingIndex); + lastQuoteIndex = header.indexOf("'", firstQuoteIndex + 1); + } else + lastQuoteIndex = header.indexOf("\"", firstQuoteIndex + 1); + + return header.substring(firstQuoteIndex + 1, lastQuoteIndex); + } + + protected static byte[] readBuffer(InputStream is) throws IOException { + if (is.available() == 0) { + return new byte[0]; + } + + byte[] buffer = new byte[BUFFER_SIZE]; + is.mark(BUFFER_SIZE); + int bytesRead = is.read(buffer, 0, BUFFER_SIZE); + int totalBytesRead = bytesRead; + + while (bytesRead != -1 && (totalBytesRead < BUFFER_SIZE)) { + bytesRead = is.read(buffer, totalBytesRead, BUFFER_SIZE - totalBytesRead); + + if (bytesRead != -1) + totalBytesRead += bytesRead; + } + + if (totalBytesRead < BUFFER_SIZE) { + byte[] smallerBuffer = new byte[totalBytesRead]; + System.arraycopy(buffer, 0, smallerBuffer, 0, totalBytesRead); + smallerBuffer = buffer; + } + + is.reset(); + return buffer; + } + + public static InputSource getInputSource(URL url) throws IOException { + InputStream is = openStream(url); + return getInputSource(url, is); + } + + private static InputStream openStream(URL url) throws IOException { + URLConnection connection = url.openConnection(); + if (connection instanceof JarURLConnection) { + // See http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5041014 + connection.setUseCaches(false); + } + InputStream is = connection.getInputStream(); + return is; + } + + public static InputSource getInputSource(URL url, InputStream is) throws IOException { + // is = new BufferedInputStream(is); + // String encoding = getEncoding(is); + InputSource inputSource = new InputSource(is); + // inputSource.setEncoding(encoding); + // [rfeng] Make sure we set the system id as it will be used as the base URI for nested import/include + inputSource.setSystemId(url.toString()); + return inputSource; + } + +} |