All Downloads are FREE. Search and download functionalities are using the official Maven repository.

com.sun.codemodel.fmt.JStaticJavaFile Maven / Gradle / Ivy

Go to download

The core functionality of the CodeModel Java source code generation library

The newest version!
/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
 * "Portions Copyright [year] [name of copyright owner]"
 *
 * Contributor(s):
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package com.sun.codemodel.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.JClass;
import com.sun.codemodel.JPackage;
import com.sun.codemodel.JResourceFile;
import com.sun.codemodel.JTypeVar;

/**
 * Statically generated Java soruce file.
 * 
 * 

* This {@link JResourceFile} implementation will generate a Java source * file by copying the source code from a resource. *

* 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. *

* 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. *

* 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 ([email protected]) */ 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}. *

* 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. *

* 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 _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 bindings) { return this; } }; }





© 2015 - 2024 Weber Informatics LLC | Privacy Policy