Mercurial > hg > graal-jvmci-8
view graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/model/GuardExpression.java @ 18776:c0fb70634640
Truffle-DSL: support for frame types Frame, MaterializedFrame. Added validation for frame type consistency. Some refactorings along the way.
author | Christian Humer <christian.humer@gmail.com> |
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date | Mon, 05 Jan 2015 01:31:08 +0100 |
parents | c88ab4f1f04a |
children | 08aa0372dad4 |
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/* * Copyright (c) 2012, 2012, 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 com.oracle.truffle.dsl.processor.model; import java.util.*; public final class GuardExpression { private GuardData resolvedGuard; private NodeExecutionData[] resolvedChildren; private final String guardName; private final boolean negated; private final String[] childNames; public GuardExpression(String expression, boolean allowArguments) { String exp = expression; if (exp.startsWith("!")) { exp = exp.substring(1, exp.length()); negated = true; } else { negated = false; } int argumentStart = exp.indexOf('('); int endIndex = exp.lastIndexOf(')'); if (allowArguments && argumentStart != -1 && endIndex != -1) { guardName = exp.substring(0, argumentStart).trim(); String arguments = exp.substring(argumentStart + 1, endIndex); String[] children = arguments.split(","); for (int i = 0; i < children.length; i++) { children[i] = children[i].trim(); } if (children.length == 1 && children[0].isEmpty()) { childNames = new String[0]; } else { childNames = children; } } else { guardName = exp; childNames = null; } } public String[] getChildNames() { return childNames; } public boolean isResolved() { return resolvedGuard != null; } public String getGuardName() { return guardName; } public NodeExecutionData[] getResolvedChildren() { return resolvedChildren; } public void setResolvedChildren(NodeExecutionData[] resolvedChildren) { this.resolvedChildren = resolvedChildren; } public void setResolvedGuard(GuardData guard) { this.resolvedGuard = guard; } @Override public boolean equals(Object obj) { if (this == obj) { return true; } else if (obj instanceof GuardExpression) { GuardExpression other = (GuardExpression) obj; if (isResolved() && other.isResolved()) { return resolvedGuard.equals(other.resolvedGuard) && negated == other.negated && Arrays.equals(resolvedChildren, other.resolvedChildren); } else { boolean equal = guardName.equals(other.guardName) && negated == other.negated; if (childNames != null && other.childNames != null) { equal &= Arrays.equals(childNames, other.childNames); } return equal; } } return false; } @Override public int hashCode() { return Objects.hash(guardName, negated, resolvedGuard, resolvedChildren); } public boolean implies(GuardExpression other) { if (equals(other)) { return true; } if (isResolved() && other.isResolved()) { for (GuardExpression implies : getResolvedGuard().getImpliesExpressions()) { if (implies.getGuardName().equals(other.getGuardName())) { if (implies.isNegated() == other.isNegated()) { return true; } } } } return false; } @Override public String toString() { return (negated ? "!" : "") + guardName; } public boolean isNegated() { return negated; } public GuardData getResolvedGuard() { return resolvedGuard; } }