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8187443: Forest Consolidation: Move files to unified layout
Reviewed-by: darcy, ihse
This commit is contained in:
Erik Joelsson
parent
270fe13182
commit
3789983e89
56923 changed files with 3 additions and 15727 deletions
324
src/jdk.jartool/share/classes/sun/tools/jar/FingerPrint.java
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324
src/jdk.jartool/share/classes/sun/tools/jar/FingerPrint.java
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@ -0,0 +1,324 @@
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/*
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* Copyright (c) 2016, 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 sun.tools.jar;
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import jdk.internal.org.objectweb.asm.*;
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import java.io.IOException;
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import java.io.InputStream;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.util.HashMap;
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import java.util.HashSet;
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import java.util.Map;
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import java.util.Set;
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/**
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* A FingerPrint is an abstract representation of a JarFile entry that contains
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* information to determine if the entry represents a class or a
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* resource, and whether two entries are identical. If the FingerPrint represents
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* a class, it also contains information to (1) describe the public API;
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* (2) compare the public API of this class with another class; (3) determine
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* whether or not it's a nested class and, if so, the name of the associated
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* top level class; and (4) for an canonically ordered set of classes determine
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* if the class versions are compatible. A set of classes is canonically
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* ordered if the classes in the set have the same name, and the base class
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* precedes the versioned classes and if each versioned class with version
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* {@code n} precedes classes with versions {@code > n} for all versions
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* {@code n}.
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*/
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final class FingerPrint {
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private static final MessageDigest MD;
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private final byte[] sha1;
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private final ClassAttributes attrs;
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private final boolean isClassEntry;
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private final String entryName;
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static {
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try {
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MD = MessageDigest.getInstance("SHA-1");
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} catch (NoSuchAlgorithmException x) {
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// log big problem?
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throw new RuntimeException(x);
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}
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}
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public FingerPrint(String entryName,byte[] bytes) throws IOException {
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this.entryName = entryName;
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if (entryName.endsWith(".class") && isCafeBabe(bytes)) {
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isClassEntry = true;
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sha1 = sha1(bytes, 8); // skip magic number and major/minor version
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attrs = getClassAttributes(bytes);
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} else {
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isClassEntry = false;
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sha1 = sha1(bytes);
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attrs = new ClassAttributes(); // empty class
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}
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}
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public boolean isClass() {
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return isClassEntry;
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}
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public boolean isNestedClass() {
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return attrs.nestedClass;
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}
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public boolean isPublicClass() {
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return attrs.publicClass;
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}
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public boolean isIdentical(FingerPrint that) {
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if (that == null) return false;
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if (this == that) return true;
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return isEqual(this.sha1, that.sha1);
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}
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public boolean isCompatibleVersion(FingerPrint that) {
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return attrs.version >= that.attrs.version;
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}
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public boolean isSameAPI(FingerPrint that) {
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if (that == null) return false;
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return attrs.equals(that.attrs);
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}
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public String name() {
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String name = attrs.name;
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return name == null ? entryName : name;
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}
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public String topLevelName() {
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String name = attrs.topLevelName;
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return name == null ? name() : name;
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}
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private byte[] sha1(byte[] entry) {
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MD.update(entry);
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return MD.digest();
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}
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private byte[] sha1(byte[] entry, int offset) {
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MD.update(entry, offset, entry.length - offset);
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return MD.digest();
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}
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private boolean isEqual(byte[] sha1_1, byte[] sha1_2) {
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return MessageDigest.isEqual(sha1_1, sha1_2);
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}
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private static final byte[] cafeBabe = {(byte)0xca, (byte)0xfe, (byte)0xba, (byte)0xbe};
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private boolean isCafeBabe(byte[] bytes) {
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if (bytes.length < 4) return false;
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for (int i = 0; i < 4; i++) {
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if (bytes[i] != cafeBabe[i]) {
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return false;
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}
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}
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return true;
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}
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private ClassAttributes getClassAttributes(byte[] bytes) {
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ClassReader rdr = new ClassReader(bytes);
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ClassAttributes attrs = new ClassAttributes();
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rdr.accept(attrs, 0);
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return attrs;
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}
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private static final class Field {
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private final int access;
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private final String name;
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private final String desc;
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Field(int access, String name, String desc) {
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this.access = access;
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this.name = name;
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this.desc = desc;
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}
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@Override
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public boolean equals(Object that) {
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if (that == null) return false;
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if (this == that) return true;
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if (!(that instanceof Field)) return false;
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Field field = (Field)that;
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return (access == field.access) && name.equals(field.name)
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&& desc.equals(field.desc);
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}
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@Override
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public int hashCode() {
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int result = 17;
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result = 37 * result + access;
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result = 37 * result + name.hashCode();
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result = 37 * result + desc.hashCode();
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return result;
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}
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}
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private static final class Method {
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private final int access;
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private final String name;
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private final String desc;
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private final Set<String> exceptions;
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Method(int access, String name, String desc, Set<String> exceptions) {
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this.access = access;
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this.name = name;
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this.desc = desc;
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this.exceptions = exceptions;
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}
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@Override
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public boolean equals(Object that) {
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if (that == null) return false;
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if (this == that) return true;
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if (!(that instanceof Method)) return false;
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Method method = (Method)that;
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return (access == method.access) && name.equals(method.name)
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&& desc.equals(method.desc)
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&& exceptions.equals(method.exceptions);
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}
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@Override
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public int hashCode() {
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int result = 17;
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result = 37 * result + access;
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result = 37 * result + name.hashCode();
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result = 37 * result + desc.hashCode();
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result = 37 * result + exceptions.hashCode();
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return result;
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}
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}
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private static final class ClassAttributes extends ClassVisitor {
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private String name;
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private String topLevelName;
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private String superName;
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private int version;
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private int access;
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private boolean publicClass;
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private boolean nestedClass;
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private final Set<Field> fields = new HashSet<>();
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private final Set<Method> methods = new HashSet<>();
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public ClassAttributes() {
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super(Opcodes.ASM5);
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}
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private boolean isPublic(int access) {
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return ((access & Opcodes.ACC_PUBLIC) == Opcodes.ACC_PUBLIC)
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|| ((access & Opcodes.ACC_PROTECTED) == Opcodes.ACC_PROTECTED);
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}
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@Override
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public void visit(int version, int access, String name, String signature,
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String superName, String[] interfaces) {
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this.version = version;
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this.access = access;
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this.name = name;
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this.nestedClass = name.contains("$");
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this.superName = superName;
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this.publicClass = isPublic(access);
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}
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@Override
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public void visitOuterClass(String owner, String name, String desc) {
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if (!this.nestedClass) return;
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this.topLevelName = owner;
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}
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@Override
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public void visitInnerClass(String name, String outerName, String innerName,
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int access) {
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if (!this.nestedClass) return;
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if (outerName == null) return;
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if (!this.name.equals(name)) return;
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if (this.topLevelName == null) this.topLevelName = outerName;
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}
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@Override
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public FieldVisitor visitField(int access, String name, String desc,
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String signature, Object value) {
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if (isPublic(access)) {
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fields.add(new Field(access, name, desc));
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}
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return null;
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}
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@Override
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public MethodVisitor visitMethod(int access, String name, String desc,
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String signature, String[] exceptions) {
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if (isPublic(access)) {
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Set<String> exceptionSet = new HashSet<>();
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if (exceptions != null) {
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for (String e : exceptions) {
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exceptionSet.add(e);
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}
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}
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// treat type descriptor as a proxy for signature because signature
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// is usually null, need to strip off the return type though
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int n;
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if (desc != null && (n = desc.lastIndexOf(')')) != -1) {
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desc = desc.substring(0, n + 1);
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methods.add(new Method(access, name, desc, exceptionSet));
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}
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}
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return null;
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}
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@Override
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public void visitEnd() {
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this.nestedClass = this.topLevelName != null;
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}
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@Override
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public boolean equals(Object that) {
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if (that == null) return false;
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if (this == that) return true;
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if (!(that instanceof ClassAttributes)) return false;
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ClassAttributes clsAttrs = (ClassAttributes)that;
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boolean superNameOkay = superName != null
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? superName.equals(clsAttrs.superName) : true;
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return access == clsAttrs.access
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&& superNameOkay
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&& fields.equals(clsAttrs.fields)
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&& methods.equals(clsAttrs.methods);
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}
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@Override
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public int hashCode() {
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int result = 17;
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result = 37 * result + access;
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result = 37 * result + superName != null ? superName.hashCode() : 0;
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result = 37 * result + fields.hashCode();
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result = 37 * result + methods.hashCode();
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return result;
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}
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}
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}
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