| /* |
| * Copyright 2006 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| |
| package com.sun.xml.internal.rngom.parse.compact; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.PushbackInputStream; |
| import java.io.Reader; |
| import java.net.URL; |
| |
| import com.sun.xml.internal.rngom.ast.builder.BuildException; |
| import com.sun.xml.internal.rngom.ast.builder.IncludedGrammar; |
| import com.sun.xml.internal.rngom.ast.builder.SchemaBuilder; |
| import com.sun.xml.internal.rngom.ast.builder.Scope; |
| import com.sun.xml.internal.rngom.ast.om.ParsedPattern; |
| import com.sun.xml.internal.rngom.parse.IllegalSchemaException; |
| import com.sun.xml.internal.rngom.parse.Parseable; |
| import com.sun.xml.internal.rngom.xml.util.EncodingMap; |
| import org.xml.sax.ErrorHandler; |
| import org.xml.sax.InputSource; |
| |
| /** |
| * RELAX NG schema in the compact syntax. |
| */ |
| public class CompactParseable implements Parseable { |
| private final InputSource in; |
| private final ErrorHandler eh; |
| |
| public CompactParseable(InputSource in, ErrorHandler eh) { |
| this.in = in; |
| this.eh = eh; |
| } |
| |
| public ParsedPattern parse(SchemaBuilder sb) throws BuildException, IllegalSchemaException { |
| ParsedPattern p = new CompactSyntax(this, makeReader(in), in.getSystemId(), sb, eh, "").parse(null); |
| return sb.expandPattern(p); |
| } |
| |
| public ParsedPattern parseInclude(String uri, SchemaBuilder sb, IncludedGrammar g, String inheritedNs) |
| throws BuildException, IllegalSchemaException { |
| InputSource tem = new InputSource(uri); |
| tem.setEncoding(in.getEncoding()); |
| return new CompactSyntax(this, makeReader(tem), uri, sb, eh, inheritedNs).parseInclude(g); |
| } |
| |
| public ParsedPattern parseExternal(String uri, SchemaBuilder sb, Scope scope, String inheritedNs) |
| throws BuildException, IllegalSchemaException { |
| InputSource tem = new InputSource(uri); |
| tem.setEncoding(in.getEncoding()); |
| return new CompactSyntax(this, makeReader(tem), uri, sb, eh, inheritedNs).parse(scope); |
| } |
| |
| private static final String UTF8 = EncodingMap.getJavaName("UTF-8"); |
| private static final String UTF16 = EncodingMap.getJavaName("UTF-16"); |
| |
| private static Reader makeReader(InputSource is) throws BuildException { |
| try { |
| Reader r = is.getCharacterStream(); |
| if (r == null) { |
| InputStream in = is.getByteStream(); |
| if (in == null) { |
| String systemId = is.getSystemId(); |
| in = new URL(systemId).openStream(); |
| } |
| String encoding = is.getEncoding(); |
| if (encoding == null) { |
| PushbackInputStream pb = new PushbackInputStream(in, 2); |
| encoding = detectEncoding(pb); |
| in = pb; |
| } |
| r = new InputStreamReader(in, encoding); |
| } |
| return r; |
| } |
| catch (IOException e) { |
| throw new BuildException(e); |
| } |
| } |
| |
| static private String detectEncoding(PushbackInputStream in) throws IOException { |
| String encoding = UTF8; |
| int b1 = in.read(); |
| if (b1 != -1) { |
| int b2 = in.read(); |
| if (b2 != -1) { |
| in.unread(b2); |
| if ((b1 == 0xFF && b2 == 0xFE) || (b1 == 0xFE && b2 == 0xFF)) |
| encoding = UTF16; |
| } |
| in.unread(b1); |
| } |
| return encoding; |
| } |
| } |