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AspectJ tools most notably contains the AspectJ compiler (AJC). AJC applies aspects to Java classes during
compilation, fully replacing Javac for plain Java classes and also compiling native AspectJ or annotation-based
@AspectJ syntax. Furthermore, AJC can weave aspects into existing class files in a post-compile binary weaving step.
This library is a superset of AspectJ weaver and hence also of AspectJ runtime.
/*******************************************************************************
* Copyright (c) 2021, 2023 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.aspectj.org.eclipse.jdt.core.dom;
import java.util.ArrayList;
import java.util.List;
import org.aspectj.org.eclipse.jdt.internal.core.dom.util.DOMASTUtil;
/**
* GuardedPattern pattern AST node type.
*
*
* GuardedPattern:
* Pattern when Expression
*
*
* @since 3.27
* @noinstantiate This class is not intended to be instantiated by clients.
* @noreference This class is not intended to be referenced by clients.
*/
@SuppressWarnings("rawtypes")
public class GuardedPattern extends Pattern{
GuardedPattern(AST ast) {
super(ast);
supportedOnlyIn21();
}
/**
* The "pattern" structural property of this node type (child type: {@link Pattern}). (added in JEP 406).
*/
public static final ChildPropertyDescriptor PATTERN_PROPERTY = internalPatternPropertyFactory(GuardedPattern.class);
/**
* The "expression" structural property of this node type (child type: {@link Expression}). (added in JEP 406).
*/
public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
new ChildPropertyDescriptor(GuardedPattern.class, "expression", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$);
/**
* A character index into the original restricted identifier source string, or -1 if no restricted
* identifier source position information is available for this node; -1 by default.
*/
private int restrictedIdentifierStartPosition = -1;
/**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
private static final List PROPERTY_DESCRIPTORS;
static {
List propertyList = new ArrayList(3);
createPropertyList(GuardedPattern.class, propertyList);
addProperty(PATTERN_PROPERTY, propertyList);
addProperty(EXPRESSION_PROPERTY, propertyList);
PROPERTY_DESCRIPTORS = reapPropertyList(propertyList);
}
/**
* The pattern; null for none
*/
private Pattern pattern = null;
/**
* The expression; null for none; lazily initialized (but
* does not default to none).
*/
private Expression conditonalExpression = null;
@Override
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 == EXPRESSION_PROPERTY) {
if (get) {
return getExpression();
} else {
setExpression((Expression) child);
return null;
}
} else if (property == PATTERN_PROPERTY) {
if (get) {
return getPattern();
} else {
setPattern((Pattern)child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
int getNodeType0() {
return GUARDED_PATTERN;
}
@Override
boolean subtreeMatch0(ASTMatcher matcher, Object other) {
return matcher.match(this, other);
}
@Override
ASTNode clone0(AST target) {
GuardedPattern result = new GuardedPattern(target);
result.setSourceRange(getStartPosition(), getLength());
result.setPattern((Pattern) getPattern().clone(target));
result.setExpression((Expression) getExpression().clone(target));
result.setRestrictedIdentifierStartPosition(this.restrictedIdentifierStartPosition);
return result;
}
@Override
void accept0(ASTVisitor visitor) {
boolean visitChildren = visitor.visit(this);
if (visitChildren) {
// visit children in normal left to right reading order
acceptChild(visitor, getPattern());
acceptChild(visitor, getExpression());
}
visitor.endVisit(this);
}
@Override
int memSize() {
return BASE_NODE_SIZE + 2 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.pattern == null ? 0 : getPattern().treeSize())
+ (this.conditonalExpression == null ? 0 : getExpression().treeSize());
}
/**
* 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})
*/
public static List propertyDescriptors(int apiLevel) {
return null;
}
/**
* 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.
*/
public static List propertyDescriptors(int apiLevel, boolean previewEnabled) {
if (DOMASTUtil.isPatternSupported(apiLevel, previewEnabled)) {
return PROPERTY_DESCRIPTORS;
}
return null;
}
/**
* Returns the conditional expression of this pattern, or
* null if there is none (the "default:" case).
*
* @return the expression node, or null if there is none
*/
public Expression getExpression() {
supportedOnlyIn21();
if (this.conditonalExpression == null) {
//lazy init must be thread-safe for readers
synchronized (this) {
if (this.conditonalExpression == null) {
preLazyInit();
this.conditonalExpression = this.ast.newNullLiteral();
postLazyInit(this.pattern, EXPRESSION_PROPERTY);
}
}
}
return this.conditonalExpression;
}
/**
* Returns the pattern of this Guarded Pattern, or
* empty if there is none.
* @return the pattern node
* (element type: {@link Pattern})
* @exception UnsupportedOperationException if this operation is used other than JLS18
* @exception UnsupportedOperationException if this expression is used with previewEnabled flag as false
* @noreference This method is not intended to be referenced by clients as it is a part of Java preview feature.
*/
public Pattern getPattern() {
supportedOnlyIn21();
if (this.pattern == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.pattern == null) {
preLazyInit();
this.pattern = this.ast.newNullPattern();
postLazyInit(this.pattern, PATTERN_PROPERTY);
}
}
}
return this.pattern;
}
/**
* Sets the conditional expression of this pattern, or clears it (turns it into
* the "default:" case).
*
* @param expression the expression node, or null to
* turn it into the "default:" case
* @exception IllegalArgumentException if:
*
* - the node belongs to a different AST
* - the node already has a parent
* - a cycle in would be created
*
*/
public void setExpression(Expression expression) {
supportedOnlyIn21();
ASTNode oldChild = this.conditonalExpression;
preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
this.conditonalExpression = expression;
postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY);
}
/**
* Sets the pattern of this switch case.
* @noreference This method is not intended to be referenced by clients.
* @exception UnsupportedOperationException if this operation is used not for JLS18
* @exception UnsupportedOperationException if this operation is used without previewEnabled
*/
public void setPattern(Pattern pattern) {
supportedOnlyIn21();
ASTNode oldChild = this.pattern;
preReplaceChild(oldChild, pattern, PATTERN_PROPERTY);
this.pattern = pattern;
postReplaceChild(oldChild, pattern, PATTERN_PROPERTY);
}
/**
* A character index into the original restricted identifier source string, or -1 if no restricted
* identifier source position information is available for this node; -1 by default.
* @noreference
* since 3.30
*/
protected void setRestrictedIdentifierStartPosition(int restrictedIdentifierStartPosition) {
if (restrictedIdentifierStartPosition < 0) {
throw new IllegalArgumentException();
}
// restrictedIdentifierStartPosition is not considered a structural property
// but we protect it nevertheless
checkModifiable();
this.restrictedIdentifierStartPosition = restrictedIdentifierStartPosition;
}
/**
* A character index into the original restricted identifier source string, or -1 if no restricted
* identifier source position information is available for this node; -1 by default.
* @noreference
* @since 3.30
*/
public int getRestrictedIdentifierStartPosition() {
return this.restrictedIdentifierStartPosition;
}
}