Transformer.java revision 3012:adba44f6b471
11541Srgrimes/* 21541Srgrimes * Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved. 31541Srgrimes * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 41541Srgrimes * 51541Srgrimes * This code is free software; you can redistribute it and/or modify it 61541Srgrimes * under the terms of the GNU General Public License version 2 only, as 71541Srgrimes * published by the Free Software Foundation. Oracle designates this 81541Srgrimes * particular file as subject to the "Classpath" exception as provided 91541Srgrimes * by Oracle in the LICENSE file that accompanied this code. 101541Srgrimes * 111541Srgrimes * This code is distributed in the hope that it will be useful, but WITHOUT 121541Srgrimes * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 131541Srgrimes * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 141541Srgrimes * version 2 for more details (a copy is included in the LICENSE file that 151541Srgrimes * accompanied this code). 161541Srgrimes * 171541Srgrimes * You should have received a copy of the GNU General Public License version 181541Srgrimes * 2 along with this work; if not, write to the Free Software Foundation, 191541Srgrimes * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 201541Srgrimes * 211541Srgrimes * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 221541Srgrimes * or visit www.oracle.com if you need additional information or have any 231541Srgrimes * questions. 241541Srgrimes */ 251541Srgrimes 261541Srgrimespackage com.sun.tools.sjavac; 271541Srgrimes 281541Srgrimesimport java.io.PrintStream; 291541Srgrimesimport java.net.URI; 301541Srgrimesimport java.util.Map; 311541Srgrimesimport java.util.Set; 321541Srgrimes 331541Srgrimesimport com.sun.tools.sjavac.comp.CompilationService; 341541Srgrimesimport com.sun.tools.sjavac.options.Options; 351541Srgrimesimport com.sun.tools.sjavac.pubapi.PubApi; 361541Srgrimes 371541Srgrimes/** 381541Srgrimes * The transform interface is used to transform content inside a package, from one form to another. 391541Srgrimes * Usually the output form is an unpredictable number of output files. (eg class files) 401541Srgrimes * but can also be an unpredictable number of generated source files (eg idl2java) 411541Srgrimes * or a single predictable output file (eg when copying,cleaning or compiling a properties file). 421541Srgrimes * 431541Srgrimes * <p><b>This is NOT part of any supported API. 441541Srgrimes * If you write code that depends on this, you do so at your own risk. 451541Srgrimes * This code and its internal interfaces are subject to change or 461541Srgrimes * deletion without notice.</b> 471541Srgrimes */ 481541Srgrimespublic interface Transformer { 491541Srgrimes /** 501541Srgrimes * The transform method takes a set of package names, mapped to their source files and to the 511541Srgrimes * pubapis of the packages. 521541Srgrimes * 531541Srgrimes * The transform implementation must: 541541Srgrimes * store the names of the generated artifacts for each package into package_artifacts 551541Srgrimes * store found dependencies to other packages into the supplied set package_dependencies 561541Srgrimes * store the public api for a package into the supplied set package_pubapis 571541Srgrimes * 581541Srgrimes * Any benign messages as a result of running the transform 591541Srgrimes * are written into stdout, and errors are written to stderr. 601541Srgrimes * 611541Srgrimes * The debug_level can be 0=silent (only warnings and errors) 1=normal 2=verbose 3 or greater=debug 621541Srgrimes * setExtra is used to set the extra information information that can be passed on 631541Srgrimes * the command line to the smart javac wrapper. 641541Srgrimes * 65 * If sjavac is building incrementally from an existing javac_state, the var incremental is true. 66 * 67 * The transformer will only be called if some source in the package (or dependency) has 68 * a modified timestamp. Thus the transformer might get called with many sources, of which 69 * only one has changed. The transformer is allowed to regenerate all artifacts but 70 * a better transformer will only write those artifacts that need updating. 71 * 72 * However the transformer must verify that the existing artifacts really are there! 73 * and it must always update package_artifacts, package_dependencies, and package_pubapis correctly. 74 * This means that at least for Java source, it will always have to recompile the sources. 75 * 76 * The transformer is allowed to put files anywhere in the dest_root. 77 * An example of this is, can be the META-INF transformer that copy files 78 * below META-INF directories to the single META-INF directory below dest_root. 79 * 80 * False is returned if there was an error that prevented the transform. 81 * I.e. something was printed on stderr. 82 * 83 * If num_cores is set to a non-zero value. The transform should attempt to use no more than these 84 * number of threads for heavy work. 85 */ 86 boolean transform(CompilationService sjavac, 87 Map<String,Set<URI>> pkgSrcs, 88 Set<URI> visibleSources, 89 Map<URI,Set<String>> visibleClasses, 90 Map<String,Set<String>> oldPackageDependencies, 91 URI destRoot, 92 Map<String,Set<URI>> packageArtifacts, 93 Map<String, Map<String, Set<String>>> packageDependencies, // Package name -> Fully Qualified Type [from] -> Set of fully qualified type [to] 94 Map<String, Map<String, Set<String>>> packageCpDependencies, // Package name -> Fully Qualified Type [from] -> Set of fully qualified type [to] 95 Map<String, PubApi> packagePublicApis, 96 Map<String, PubApi> dependencyApis, 97 int debugLevel, 98 boolean incremental, 99 int numCores, 100 PrintStream out, 101 PrintStream err); 102 103 void setExtra(String e); 104 void setExtra(Options args); 105} 106