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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) 2000, 2013 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.HashMap;
import java.util.List;
import java.util.Map;
/**
* Postfix expression AST node type.
*
*
* PostfixExpression:
* Expression PostfixOperator
*
*
* @since 2.0
* @noinstantiate This class is not intended to be instantiated by clients.
*/
@SuppressWarnings({"rawtypes", "unchecked"})
public class PostfixExpression extends Expression {
/**
* Postfix operators (typesafe enumeration).
*
* PostfixOperator:
* ++ INCREMENT
* -- DECREMENT
*
*/
public static class Operator {
/**
* The token for the operator.
*/
private final String token;
/**
* Creates a new postfix operator with the given token.
*
* Note: this constructor is private. The only instances
* ever created are the ones for the standard operators.
*
*
* @param token the character sequence for the operator
*/
private Operator(String token) {
this.token = token;
}
/**
* Returns the character sequence for the operator.
*
* @return the character sequence for the operator
*/
@Override
public String toString() {
return this.token;
}
/** Postfix increment "++" operator. */
public static final Operator INCREMENT = new Operator("++");//$NON-NLS-1$
/** Postfix decrement "--" operator. */
public static final Operator DECREMENT = new Operator("--");//$NON-NLS-1$
/**
* Map from token to operator (key type: String;
* value type: Operator).
*/
private static final Map CODES;
static {
CODES = new HashMap(20);
Operator[] ops = {
INCREMENT,
DECREMENT,
};
for (int i = 0; i < ops.length; i++) {
CODES.put(ops[i].toString(), ops[i]);
}
}
/**
* Returns the postfix operator corresponding to the given string,
* or null if none.
*
* toOperator is the converse of toString:
* that is, Operator.toOperator(op.toString()) == op for
* all operators op.
*
*
* @param token the character sequence for the operator
* @return the postfix operator, or null if none
*/
public static Operator toOperator(String token) {
return (Operator) CODES.get(token);
}
}
/**
* The "operator" structural property of this node type (type: {@link PostfixExpression.Operator}).
* @since 3.0
*/
public static final SimplePropertyDescriptor OPERATOR_PROPERTY =
new SimplePropertyDescriptor(PostfixExpression.class, "operator", PostfixExpression.Operator.class, MANDATORY); //$NON-NLS-1$
/**
* The "operand" structural property of this node type (child type: {@link Expression}).
* @since 3.0
*/
public static final ChildPropertyDescriptor OPERAND_PROPERTY =
new ChildPropertyDescriptor(PostfixExpression.class, "operand", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$
/**
* 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(PostfixExpression.class, propertyList);
addProperty(OPERAND_PROPERTY, propertyList);
addProperty(OPERATOR_PROPERTY, propertyList);
PROPERTY_DESCRIPTORS = reapPropertyList(propertyList);
}
/**
* 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 PROPERTY_DESCRIPTORS;
}
/**
* The operator; defaults to an unspecified postfix operator.
*/
private PostfixExpression.Operator operator =
PostfixExpression.Operator.INCREMENT;
/**
* The operand; lazily initialized; defaults to an unspecified,
* but legal, simple name.
*/
private Expression operand = null;
/**
* Creates a new AST node for an postfix expression owned by the given
* AST. By default, the node has unspecified (but legal) operator and
* operand.
*
* @param ast the AST that is to own this node
*/
PostfixExpression(AST ast) {
super(ast);
}
@Override
final List internalStructuralPropertiesForType(int apiLevel) {
return propertyDescriptors(apiLevel);
}
@Override
final Object internalGetSetObjectProperty(SimplePropertyDescriptor property, boolean get, Object value) {
if (property == OPERATOR_PROPERTY) {
if (get) {
return getOperator();
} else {
setOperator((Operator) value);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetObjectProperty(property, get, value);
}
@Override
final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) {
if (property == OPERAND_PROPERTY) {
if (get) {
return getOperand();
} else {
setOperand((Expression) child);
return null;
}
}
// allow default implementation to flag the error
return super.internalGetSetChildProperty(property, get, child);
}
@Override
final int getNodeType0() {
return POSTFIX_EXPRESSION;
}
@Override
ASTNode clone0(AST target) {
PostfixExpression result = new PostfixExpression(target);
result.setSourceRange(getStartPosition(), getLength());
result.setOperator(getOperator());
result.setOperand((Expression) getOperand().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) {
acceptChild(visitor, getOperand());
}
visitor.endVisit(this);
}
/**
* Returns the operator of this postfix expression.
*
* @return the operator
*/
public PostfixExpression.Operator getOperator() {
return this.operator;
}
/**
* Sets the operator of this postfix expression.
*
* @param operator the operator
* @exception IllegalArgumentException if the argument is incorrect
*/
public void setOperator(PostfixExpression.Operator operator) {
if (operator == null) {
throw new IllegalArgumentException();
}
preValueChange(OPERATOR_PROPERTY);
this.operator = operator;
postValueChange(OPERATOR_PROPERTY);
}
/**
* Returns the operand of this postfix expression.
*
* @return the operand expression node
*/
public Expression getOperand() {
if (this.operand == null) {
// lazy init must be thread-safe for readers
synchronized (this) {
if (this.operand == null) {
preLazyInit();
this.operand= new SimpleName(this.ast);
postLazyInit(this.operand, OPERAND_PROPERTY);
}
}
}
return this.operand;
}
/**
* Sets the operand of this postfix expression.
*
* @param expression the operand expression node
* @exception IllegalArgumentException if:
*
* - the node belongs to a different AST
* - the node already has a parent
* - a cycle in would be created
*
*/
public void setOperand(Expression expression) {
if (expression == null) {
throw new IllegalArgumentException();
}
ASTNode oldChild = this.operand;
preReplaceChild(oldChild, expression, OPERAND_PROPERTY);
this.operand = expression;
postReplaceChild(oldChild, expression, OPERAND_PROPERTY);
}
@Override
int memSize() {
// treat Operator as free
return BASE_NODE_SIZE + 2 * 4;
}
@Override
int treeSize() {
return
memSize()
+ (this.operand == null ? 0 : getOperand().treeSize());
}
}