/* * Copyright (c) 2012, 2014, 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.tools.sjavac; import java.io.PrintStream; import java.net.URI; import java.util.Map; import java.util.Set; import com.sun.tools.sjavac.options.Options; import com.sun.tools.sjavac.pubapi.PubApi; import com.sun.tools.sjavac.server.Sjavac; /** * The transform interface is used to transform content inside a package, from one form to another. * Usually the output form is an unpredictable number of output files. (eg class files) * but can also be an unpredictable number of generated source files (eg idl2java) * or a single predictable output file (eg when copying,cleaning or compiling a properties file). * *
This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.
*/
public interface Transformer {
/**
* The transform method takes a set of package names, mapped to their source files and to the
* pubapis of the packages.
*
* The transform implementation must:
* store the names of the generated artifacts for each package into package_artifacts
* store found dependencies to other packages into the supplied set package_dependencies
* store the public api for a package into the supplied set package_pubapis
*
* Any benign messages as a result of running the transform
* are written into stdout, and errors are written to stderr.
*
* The debug_level can be 0=silent (only warnings and errors) 1=normal 2=verbose 3 or greater=debug
* setExtra is used to set the extra information information that can be passed on
* the command line to the smart javac wrapper.
*
* If sjavac is building incrementally from an existing javac_state, the var incremental is true.
*
* The transformer will only be called if some source in the package (or dependency) has
* a modified timestamp. Thus the transformer might get called with many sources, of which
* only one has changed. The transformer is allowed to regenerate all artifacts but
* a better transformer will only write those artifacts that need updating.
*
* However the transformer must verify that the existing artifacts really are there!
* and it must always update package_artifacts, package_dependencies, and package_pubapis correctly.
* This means that at least for Java source, it will always have to recompile the sources.
*
* The transformer is allowed to put files anywhere in the dest_root.
* An example of this is, can be the META-INF transformer that copy files
* below META-INF directories to the single META-INF directory below dest_root.
*
* False is returned if there was an error that prevented the transform.
* I.e. something was printed on stderr.
*
* If num_cores is set to a non-zero value. The transform should attempt to use no more than these
* number of threads for heavy work.
*/
boolean transform(Sjavac sjavac,
Map