| /********************************************************************** |
| * This file is part of "Object Teams Development Tooling"-Software |
| * |
| * Copyright 2006 Fraunhofer Gesellschaft, Munich, Germany, |
| * for its Fraunhofer Institute for Computer Architecture and Software |
| * Technology (FIRST), Berlin, Germany and Technical University Berlin, |
| * Germany. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * $Id: GuardPredicateDeclaration.java 23417 2010-02-03 20:13:55Z stephan $ |
| * |
| * Please visit http://www.eclipse.org/objectteams for updates and contact. |
| * |
| * Contributors: |
| * Fraunhofer FIRST - Initial API and implementation |
| * Technical University Berlin - Initial API and implementation |
| **********************************************************************/ |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * This class represents a declaration of a guard predicate in OT/J (OTJLD ยง5.4). |
| * |
| * @author stephan |
| */ |
| public class GuardPredicateDeclaration extends ASTNode { |
| |
| /** |
| * Structural property for the boolean expression that represents the guard's implementation. |
| */ |
| public static final ChildPropertyDescriptor EXPRESSION_PROPERTY = |
| new ChildPropertyDescriptor(GuardPredicateDeclaration.class, "expression", Expression.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$ |
| |
| /** |
| * The "base" structural property of this node type, marking whether it is a "base guard" or not. |
| */ |
| public static final SimplePropertyDescriptor BASE_PROPERTY = |
| new SimplePropertyDescriptor(GuardPredicateDeclaration.class, "base", boolean.class, MANDATORY); //$NON-NLS-1$ |
| |
| |
| private static final List<StructuralPropertyDescriptor> PROPERTY_DESCRIPTORS_3_0; |
| |
| static { |
| List<StructuralPropertyDescriptor> propertyList = new ArrayList<StructuralPropertyDescriptor>(3); |
| createPropertyList(GuardPredicateDeclaration.class, propertyList); |
| addProperty(BASE_PROPERTY, propertyList); |
| addProperty(EXPRESSION_PROPERTY, propertyList); |
| PROPERTY_DESCRIPTORS_3_0 = reapPropertyList(propertyList); |
| } |
| |
| public static List<StructuralPropertyDescriptor> propertyDescriptors(int apiLevel) { |
| if (apiLevel == AST.JLS2_INTERNAL) { |
| throw new UnsupportedOperationException("JLS2 not supported"); //$NON-NLS-1$ |
| } else { |
| return PROPERTY_DESCRIPTORS_3_0; |
| } |
| } |
| |
| private Expression expression = null; |
| private boolean isBase = false; |
| |
| GuardPredicateDeclaration(AST ast) |
| { |
| super(ast); |
| } |
| |
| @Override |
| boolean internalGetSetBooleanProperty(SimplePropertyDescriptor property, boolean get, boolean value) |
| { |
| if (property == BASE_PROPERTY) { |
| if (get) { |
| return isBase(); |
| } else { |
| setBase(value); |
| return false; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetBooleanProperty(property, get, value); |
| } |
| |
| @Override |
| ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) |
| { |
| if (property == EXPRESSION_PROPERTY) { |
| if (get) { |
| return getExpression(); |
| } else { |
| setExpression((Expression)child); |
| return null; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetChildProperty(property, get, child); |
| } |
| |
| @Override |
| int getNodeType0() { |
| return GUARD_PREDICATE_DECLARATION; |
| } |
| |
| @Override |
| void accept0(ASTVisitor visitor) { |
| boolean visitChildren = visitor.visit(this); |
| if (visitChildren) { |
| if (this.ast.apiLevel == AST.JLS2_INTERNAL) { |
| unsupportedIn2(); |
| } |
| if (this.ast.apiLevel >= AST.JLS3_INTERNAL) { |
| acceptChild(visitor, this.expression); |
| } |
| } |
| visitor.endVisit(this); |
| } |
| |
| @Override |
| boolean subtreeMatch0(ASTMatcher matcher, Object other) { |
| // dispatch to correct overloaded match method |
| return matcher.match(this, other); |
| } |
| |
| @Override |
| ASTNode clone0(AST target) { |
| if (this.ast.apiLevel == AST.JLS2_INTERNAL) |
| unsupportedIn2(); |
| GuardPredicateDeclaration result = new GuardPredicateDeclaration(target); |
| result.setSourceRange(this.getStartPosition(), this.getLength()); |
| result.setBase(this.isBase()); |
| result.setExpression((Expression)ASTNode.copySubtree(target, getExpression())); |
| return result; |
| } |
| |
| public boolean isBase() |
| { |
| return this.isBase; |
| } |
| |
| public void setBase(boolean isBase) |
| { |
| preValueChange(BASE_PROPERTY); |
| this.isBase = isBase; |
| postValueChange(BASE_PROPERTY); |
| } |
| |
| |
| public ASTNode getExpression() { |
| if (this.expression == null) { |
| // lazy init must be thread-safe for readers |
| synchronized (this) { |
| if (this.expression == null) { |
| preLazyInit(); |
| this.expression = new SimpleName(this.ast); |
| postLazyInit(this.expression, EXPRESSION_PROPERTY); |
| } |
| } |
| } |
| return this.expression; |
| } |
| |
| public void setExpression(Expression expression) { |
| if (expression == null) { |
| throw new IllegalArgumentException(); |
| } |
| ASTNode oldChild = this.expression; |
| preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY); |
| this.expression = expression; |
| postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY); |
| } |
| |
| @Override |
| List internalStructuralPropertiesForType(int apiLevel) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| @Override |
| void appendDebugString(StringBuffer buffer) { |
| if (this.isBase) |
| buffer.append("base "); //$NON-NLS-1$ |
| buffer.append("when ("); //$NON-NLS-1$ |
| this.expression.appendDebugString(buffer); |
| buffer.append(")"); //$NON-NLS-1$ |
| } |
| |
| @Override |
| int memSize() { |
| return BASE_NODE_SIZE; // FIXME(SH) + plus some constant?? |
| } |
| |
| @Override |
| int treeSize() { |
| return memSize() + (this.expression == null ? 0 : getExpression().treeSize()); |
| } |
| |
| } |