| /* |
| * Copyright (c) 1997, 2010, Oracle and/or its affiliates. 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.codemodel.internal.fmt; |
| |
| import java.io.BufferedReader; |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.OutputStream; |
| import java.io.OutputStreamWriter; |
| import java.io.PrintWriter; |
| import java.net.URL; |
| import java.text.ParseException; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import com.sun.codemodel.internal.JClass; |
| import com.sun.codemodel.internal.JPackage; |
| import com.sun.codemodel.internal.JResourceFile; |
| import com.sun.codemodel.internal.JTypeVar; |
| |
| /** |
| * Statically generated Java soruce file. |
| * |
| * <p> |
| * This {@link JResourceFile} implementation will generate a Java source |
| * file by copying the source code from a resource. |
| * <p> |
| * While copying a resource, we look for a package declaration and |
| * replace it with the target package name. This allows the static Java |
| * source code to have an arbitrary package declaration. |
| * <p> |
| * You can also use the getJClass method to obtain a {@link JClass} |
| * object that represents the static file. This allows the client code |
| * to refer to the class from other CodeModel generated code. |
| * <p> |
| * Note that because we don't parse the static Java source code, |
| * the returned {@link JClass} object doesn't respond to methods like |
| * "isInterface" or "_extends", |
| * |
| * @author |
| * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com) |
| */ |
| public final class JStaticJavaFile extends JResourceFile { |
| |
| private final JPackage pkg; |
| private final String className; |
| private final URL source; |
| private final JStaticClass clazz; |
| private final LineFilter filter; |
| |
| public JStaticJavaFile(JPackage _pkg, String className, String _resourceName) { |
| this( _pkg, className, |
| SecureLoader.getClassClassLoader(JStaticJavaFile.class).getResource(_resourceName), null ); |
| } |
| |
| public JStaticJavaFile(JPackage _pkg, String _className, URL _source, LineFilter _filter ) { |
| super(_className+".java"); |
| if(_source==null) throw new NullPointerException(); |
| this.pkg = _pkg; |
| this.clazz = new JStaticClass(); |
| this.className = _className; |
| this.source = _source; |
| this.filter = _filter; |
| } |
| |
| /** |
| * Returns a class object that represents a statically generated code. |
| */ |
| public final JClass getJClass() { |
| return clazz; |
| } |
| |
| protected boolean isResource() { |
| return false; |
| } |
| |
| protected void build(OutputStream os) throws IOException { |
| InputStream is = source.openStream(); |
| |
| BufferedReader r = new BufferedReader(new InputStreamReader(is)); |
| PrintWriter w = new PrintWriter(new BufferedWriter(new OutputStreamWriter(os))); |
| LineFilter filter = createLineFilter(); |
| int lineNumber=1; |
| |
| try { |
| String line; |
| while((line=r.readLine())!=null) { |
| line = filter.process(line); |
| if(line!=null) |
| w.println(line); |
| lineNumber++; |
| } |
| } catch( ParseException e ) { |
| throw new IOException("unable to process "+source+" line:"+lineNumber+"\n"+e.getMessage()); |
| } |
| |
| w.close(); |
| r.close(); |
| } |
| |
| /** |
| * Creates a {@link LineFilter}. |
| * <p> |
| * A derived class can override this method to process |
| * the contents of the source file. |
| */ |
| private LineFilter createLineFilter() { |
| // this filter replaces the package declaration. |
| LineFilter f = new LineFilter() { |
| public String process(String line) { |
| if(!line.startsWith("package ")) return line; |
| |
| // replace package decl |
| if( pkg.isUnnamed() ) |
| return null; |
| else |
| return "package "+pkg.name()+";"; |
| } |
| }; |
| if( filter!=null ) |
| return new ChainFilter(filter,f); |
| else |
| return f; |
| } |
| |
| /** |
| * Filter that alters the Java source code. |
| * <p> |
| * By implementing this interface, derived classes |
| * can modify the Java source file before it's written out. |
| */ |
| public interface LineFilter { |
| /** |
| * @param line |
| * a non-null valid String that corresponds to one line. |
| * No '\n' included. |
| * @return |
| * null to strip the line off. Otherwise the returned |
| * String will be written out. Do not add '\n' at the end |
| * of this string. |
| * |
| * @exception ParseException |
| * when for some reason there's an error in the line. |
| */ |
| String process(String line) throws ParseException; |
| } |
| |
| /** |
| * A {@link LineFilter} that combines two {@link LineFilter}s. |
| */ |
| public final static class ChainFilter implements LineFilter { |
| private final LineFilter first,second; |
| public ChainFilter( LineFilter first, LineFilter second ) { |
| this.first=first; |
| this.second=second; |
| } |
| public String process(String line) throws ParseException { |
| line = first.process(line); |
| if(line==null) return null; |
| return second.process(line); |
| } |
| } |
| |
| |
| private class JStaticClass extends JClass { |
| |
| private final JTypeVar[] typeParams; |
| |
| JStaticClass() { |
| super(pkg.owner()); |
| // TODO: allow those to be specified |
| typeParams = new JTypeVar[0]; |
| } |
| |
| public String name() { |
| return className; |
| } |
| |
| public String fullName() { |
| if(pkg.isUnnamed()) |
| return className; |
| else |
| return pkg.name()+'.'+className; |
| } |
| |
| public JPackage _package() { |
| return pkg; |
| } |
| |
| public JClass _extends() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public Iterator<JClass> _implements() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean isInterface() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public boolean isAbstract() { |
| throw new UnsupportedOperationException(); |
| } |
| |
| public JTypeVar[] typeParams() { |
| return typeParams; |
| } |
| |
| protected JClass substituteParams(JTypeVar[] variables, List<JClass> bindings) { |
| return this; |
| } |
| }; |
| } |