| /* |
| * Copyright (c) 2013, 2015, 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. |
| * |
| * 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 org.graalvm.compiler.replacements; |
| |
| import org.graalvm.compiler.api.replacements.ClassSubstitution; |
| import org.graalvm.compiler.api.replacements.MethodSubstitution; |
| import org.graalvm.compiler.core.common.SuppressFBWarnings; |
| import org.graalvm.compiler.nodes.graphbuilderconf.InvocationPlugin; |
| import org.graalvm.compiler.nodes.java.LoadFieldNode; |
| import org.graalvm.compiler.replacements.nodes.ArrayEqualsNode; |
| |
| // JaCoCo Exclude |
| |
| /** |
| * Substitutions for {@link java.lang.String} methods. |
| */ |
| @ClassSubstitution(String.class) |
| public class StringSubstitutions { |
| |
| @MethodSubstitution(isStatic = false) |
| @SuppressFBWarnings(value = "ES_COMPARING_PARAMETER_STRING_WITH_EQ", justification = "reference equality on the receiver is what we want") |
| public static boolean equals(final String thisString, Object obj) { |
| if (thisString == obj) { |
| return true; |
| } |
| if (!(obj instanceof String)) { |
| return false; |
| } |
| String thatString = (String) obj; |
| if (thisString.length() != thatString.length()) { |
| return false; |
| } |
| if (thisString.length() == 0) { |
| return true; |
| } |
| |
| final char[] array1 = getValue(thisString); |
| final char[] array2 = getValue(thatString); |
| |
| return ArrayEqualsNode.equals(array1, array2, array1.length); |
| } |
| |
| /** |
| * Will be intrinsified with an {@link InvocationPlugin} to a {@link LoadFieldNode}. |
| */ |
| private static native char[] getValue(String s); |
| } |