/******************************************************************************* * Copyright (c) 2000, 2020 IBM Corporation and others. * * 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 * * Contributors: * IBM Corporation - initial API and implementation *******************************************************************************/ package org.eclipse.jdt.core.dom; import java.util.ArrayList; import java.util.List; import org.eclipse.jdt.internal.core.dom.util.DOMASTUtil; /** * Instanceof expression AST node type. *
* InstanceofExpression: * Expression instanceof Type ** * @since 2.0 * @noinstantiate This class is not intended to be instantiated by clients. */ @SuppressWarnings("rawtypes") public class InstanceofExpression extends Expression { /** * The "leftOperand" structural property of this node type (child type: {@link Expression}). * @since 3.0 */ public static final ChildPropertyDescriptor LEFT_OPERAND_PROPERTY = new ChildPropertyDescriptor(InstanceofExpression.class, "leftOperand", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * The "rightOperand" structural property of this node type (child type: {@link Type}). * @since 3.0 */ public static final ChildPropertyDescriptor RIGHT_OPERAND_PROPERTY = new ChildPropertyDescriptor(InstanceofExpression.class, "rightOperand", Type.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$ /** * The "patternVariable" structural property of this node type (child type: {@link SingleVariableDeclaration}) (added in JLS14 API). * @noreference This property is not intended to be referenced by clients as it is a part of Java preview feature. * @since 3.22 */ public static final ChildPropertyDescriptor PATTERN_VARIABLE_PROPERTY = new ChildPropertyDescriptor(InstanceofExpression.class, "patternVariable", SingleVariableDeclaration.class, OPTIONAL, NO_CYCLE_RISK); //$NON-NLS-1$ /** * A list of property descriptors (element type: * {@link StructuralPropertyDescriptor}), * or null if uninitialized. */ private static final List PROPERTY_DESCRIPTORS; /** * A list of property descriptors (element type: * {@link StructuralPropertyDescriptor}), * or null if uninitialized. */ private static final List PROPERTY_DESCRIPTORS_14; static { List properyList = new ArrayList(3); createPropertyList(InstanceofExpression.class, properyList); addProperty(LEFT_OPERAND_PROPERTY, properyList); addProperty(RIGHT_OPERAND_PROPERTY, properyList); PROPERTY_DESCRIPTORS = reapPropertyList(properyList); properyList = new ArrayList(4); createPropertyList(InstanceofExpression.class, properyList); addProperty(LEFT_OPERAND_PROPERTY, properyList); addProperty(RIGHT_OPERAND_PROPERTY, properyList); addProperty(PATTERN_VARIABLE_PROPERTY, properyList); PROPERTY_DESCRIPTORS_14 = reapPropertyList(properyList); } /** * Returns a list of structural property descriptors for this node type. * Clients must not modify the result. * * @param apiLevel the API level; one of the *
AST.JLS*
constants
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
* @since 3.0
*/
public static List propertyDescriptors(int apiLevel) {
return propertyDescriptors(apiLevel, false);
}
/**
* Returns a list of structural property descriptors for this node type.
* Clients must not modify the result.
*
* @param apiLevel the API level; one of the
* AST.JLS*
constants
* @param previewEnabled the previewEnabled flag
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
* @noreference This method is not intended to be referenced by clients.
* @since 3.22
*/
public static List propertyDescriptors(int apiLevel, boolean previewEnabled) {
if (DOMASTUtil.isInstanceofExpressionPatternSupported(apiLevel, previewEnabled)) {
return PROPERTY_DESCRIPTORS_14;
}
return PROPERTY_DESCRIPTORS;
}
/**
* The left operand; lazily initialized; defaults to an unspecified,
* but legal, simple name.
*/
private Expression leftOperand = null;
/**
* The right operand; lazily initialized; defaults to an unspecified,
* but legal, simple type.
*/
private Type rightOperand = null;
/**
* The patternVariable declaration.
*/
private SingleVariableDeclaration patternVariable = null;
/**
* Creates a new AST node for an instanceof expression owned by the given
* AST. By default, the node has unspecified (but legal) operator,
* left and right operands.
*
* @param ast the AST that is to own this node
*/
InstanceofExpression(AST ast) {
super(ast);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel, boolean previewEnabled) {
return propertyDescriptors(apiLevel, previewEnabled);
}
@Override
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
if (property == LEFT_OPERAND_PROPERTY) {
if (get) {
return getLeftOperand();
} else {
setLeftOperand((Expression) child);
return null;
}
}
if (property == RIGHT_OPERAND_PROPERTY) {
if (get) {
return getRightOperand();
} else {
setRightOperand((Type) child);
return null;
}
}
if (property == PATTERN_VARIABLE_PROPERTY) {
if (get) {
return getPatternVariable();
} else {
setPatternVariable((SingleVariableDeclaration) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
final int getNodeType0() {
return INSTANCEOF_EXPRESSION;
}
@Override
ASTNode clone0(AST target) {
InstanceofExpression result = new InstanceofExpression(target);
result.setSourceRange(getStartPosition(), getLength());
result.setLeftOperand((Expression) getLeftOperand().clone(target));
result.setRightOperand((Type) getRightOperand().clone(target));
if (DOMASTUtil.isInstanceofExpressionPatternSupported(target)) {
result.setPatternVariable((SingleVariableDeclaration) getPatternVariable().clone(target));
}
return result;
}
@Override
final boolean subtreeMatch0(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
@Override
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
// visit children in normal left to right reading order
acceptChild(visitor, getLeftOperand());
acceptChild(visitor, getRightOperand());
if (DOMASTUtil.isInstanceofExpressionPatternSupported(this.ast)) {
acceptChild(visitor, getPatternVariable());
}
}
visitor.endVisit(this);
}
/**
* Returns the left operand of this instanceof expression.
*
* @return the left operand node
*/
public Expression getLeftOperand() {
if (this.leftOperand == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.leftOperand == null) {
preLazyInit();
this.leftOperand= new SimpleName(this.ast);
postLazyInit(this.leftOperand, LEFT_OPERAND_PROPERTY);
}
}
}
return this.leftOperand;
}
/**
* Sets the left operand of this instanceof expression.
*
* @param expression the left operand node
* @exception IllegalArgumentException if:
*