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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.jshell;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.regex.Matcher;
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import java.util.stream.Stream;
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import static java.util.stream.Collectors.toList;
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import static jdk.internal.jshell.remote.RemoteCodes.prefixPattern;
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import static jdk.internal.jshell.debug.InternalDebugControl.DBG_DEP;
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/**
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* Maintain relationships between the significant entities: Snippets,
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* internal snippet index, Keys, etc.
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* @author Robert Field
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*/
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final class SnippetMaps {
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private String packageName;
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private final List<Snippet> keyIndexToSnippet = new ArrayList<>();
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private final Set<Snippet> snippets = new LinkedHashSet<>();
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private final Map<String, Set<Integer>> dependencies = new HashMap<>();
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private final JShell state;
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SnippetMaps(JShell proc) {
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this.state = proc;
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}
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void installSnippet(Snippet sn) {
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if (sn != null && snippets.add(sn)) {
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if (sn.key() != null) {
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sn.setId((state.idGenerator != null)
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? state.idGenerator.apply(sn, sn.key().index())
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: "" + sn.key().index());
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setSnippet(sn.key().index(), sn);
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}
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}
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}
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private void setSnippet(int ki, Snippet snip) {
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while (ki >= keyIndexToSnippet.size()) {
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keyIndexToSnippet.add(null);
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}
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keyIndexToSnippet.set(ki, snip);
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}
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Snippet getSnippet(Key key) {
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return getSnippet(key.index());
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}
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Snippet getSnippet(int ki) {
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if (ki >= keyIndexToSnippet.size()) {
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return null;
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}
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return keyIndexToSnippet.get(ki);
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}
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List<Snippet> snippetList() {
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return new ArrayList<>(snippets);
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}
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void setPackageName(String n) {
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packageName = n;
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}
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String packageName() {
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return packageName;
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}
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String classFullName(Snippet sn) {
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return packageName + "." + sn.className();
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}
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String packageAndImportsExcept(Set<Key> except, Collection<Snippet> plus) {
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StringBuilder sb = new StringBuilder();
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sb.append("package ").append(packageName()).append(";\n");
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for (Snippet si : keyIndexToSnippet) {
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if (si != null && si.status().isDefined && (except == null || !except.contains(si.key()))) {
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sb.append(si.importLine(state));
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}
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}
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if (plus != null) {
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plus.stream()
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.forEach(psi -> sb.append(psi.importLine(state)));
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}
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return sb.toString();
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}
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List<Snippet> getDependents(Snippet snip) {
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if (!snip.kind().isPersistent) {
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return Collections.emptyList();
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}
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Set<Integer> depset;
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if (snip.unitName.equals("*")) {
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// star import
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depset = new HashSet<>();
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for (Set<Integer> as : dependencies.values()) {
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depset.addAll(as);
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}
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} else {
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depset = dependencies.get(snip.name());
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}
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if (depset == null) {
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return Collections.emptyList();
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}
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List<Snippet> deps = new ArrayList<>();
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for (Integer dss : depset) {
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Snippet dep = getSnippet(dss);
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if (dep != null) {
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deps.add(dep);
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state.debug(DBG_DEP, "Found dependency %s -> %s\n", snip.name(), dep.name());
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}
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}
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return deps;
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}
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void mapDependencies(Snippet snip) {
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addDependencies(snip.declareReferences(), snip);
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addDependencies(snip.bodyReferences(), snip);
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}
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private void addDependencies(Collection<String> refs, Snippet snip) {
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if (refs == null) return;
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for (String ref : refs) {
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dependencies.computeIfAbsent(ref, k -> new HashSet<>())
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.add(snip.key().index());
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state.debug(DBG_DEP, "Added dependency %s -> %s\n", ref, snip.name());
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}
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}
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String fullClassNameAndPackageToClass(String full, String pkg) {
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Matcher mat = prefixPattern.matcher(full);
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if (mat.lookingAt()) {
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return full.substring(mat.end());
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}
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state.debug(DBG_DEP, "SM %s %s\n", full, pkg);
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List<String> klasses = importSnippets()
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.filter(isi -> !isi.isStar)
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.map(isi -> isi.fullname)
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.collect(toList());
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for (String k : klasses) {
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if (k.equals(full)) {
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return full.substring(full.lastIndexOf(".")+1, full.length());
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}
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}
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List<String> pkgs = importSnippets()
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.filter(isi -> isi.isStar)
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.map(isi -> isi.fullname.substring(0, isi.fullname.lastIndexOf(".")))
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.collect(toList());
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pkgs.add(0, "java.lang");
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for (String ipkg : pkgs) {
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if (!ipkg.isEmpty() && ipkg.equals(pkg)) {
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return full.substring(pkg.length() + 1);
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}
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}
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return full;
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}
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/**
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* Compute the set of imports to prepend to a snippet
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* @return a stream of the import needed
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*/
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private Stream<ImportSnippet> importSnippets() {
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return state.keyMap.importKeys()
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.map(key -> (ImportSnippet)getSnippet(key))
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.filter(sn -> state.status(sn).isDefined);
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}
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}
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