/*******************************************************************************
* Copyright (c) 2009 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Zend Technologies
*******************************************************************************/
package org2.eclipse.php.internal.core.ast.nodes;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org2.eclipse.php.internal.core.PHPVersion;
import org2.eclipse.php.internal.core.ast.match.ASTMatcher;
import org2.eclipse.php.internal.core.ast.visitor.Visitor;
/**
* Represents an unary operation expression
* <pre>e.g.<pre> +$a,
* -3,
* -foo(),
* +-+-$a
*/
public class UnaryOperation extends Expression implements IOperationNode {
// '+'
public static final int OP_PLUS = 0;
// '-'
public static final int OP_MINUS = 1;
// '!'
public static final int OP_NOT = 2;
// '~'
public static final int OP_TILDA = 3;
private Expression expression;
private int operator;
/**
* The structural property of this node type.
*/
public static final ChildPropertyDescriptor EXPRESSION_PROPERTY =
new ChildPropertyDescriptor(UnaryOperation.class, "expression", Expression.class, MANDATORY, CYCLE_RISK); //$NON-NLS-1$
public static final SimplePropertyDescriptor OPERATOR_PROPERTY =
new SimplePropertyDescriptor(UnaryOperation.class, "operator", Integer.class, MANDATORY); //$NON-NLS-1$
/**
* A list of property descriptors (element type:
* {@link StructuralPropertyDescriptor}),
* or null if uninitialized.
*/
private static final List<StructuralPropertyDescriptor> PROPERTY_DESCRIPTORS;
static {
List<StructuralPropertyDescriptor> propertyList = new ArrayList<StructuralPropertyDescriptor>(2);
propertyList.add(EXPRESSION_PROPERTY);
propertyList.add(OPERATOR_PROPERTY);
PROPERTY_DESCRIPTORS = Collections.unmodifiableList(propertyList);
}
public UnaryOperation(int start, int end, AST ast, Expression expr, int operator) {
super(start, end, ast);
if (expr == null) {
throw new IllegalArgumentException();
}
setExpression(expr);
setOperator(operator);
}
public UnaryOperation(AST ast) {
super(ast);
}
public void accept0(Visitor visitor) {
final boolean visit = visitor.visit(this);
if (visit) {
childrenAccept(visitor);
}
visitor.endVisit(this);
}
public void childrenAccept(Visitor visitor) {
expression.accept(visitor);
}
public void traverseTopDown(Visitor visitor) {
accept(visitor);
expression.traverseTopDown(visitor);
}
public void traverseBottomUp(Visitor visitor) {
expression.traverseBottomUp(visitor);
accept(visitor);
}
public void toString(StringBuffer buffer, String tab) {
buffer.append(tab).append("<UnaryOperation"); //$NON-NLS-1$
appendInterval(buffer);
buffer.append(" operator='").append(getOperator(operator)).append("'>\n"); //$NON-NLS-1$ //$NON-NLS-2$
expression.toString(buffer, TAB + tab);
buffer.append("\n").append(tab).append("</UnaryOperation>"); //$NON-NLS-1$ //$NON-NLS-2$
}
public static String getOperator(int operator) {
switch (operator) {
case OP_PLUS:
return "+"; //$NON-NLS-1$
case OP_MINUS:
return "-"; //$NON-NLS-1$
case OP_NOT:
return "!"; //$NON-NLS-1$
case OP_TILDA:
return "~"; //$NON-NLS-1$
default:
throw new IllegalArgumentException();
}
}
public int getType() {
return ASTNode.UNARY_OPERATION;
}
/**
* Returns the expression of this unary operation.
*
* @return the expression node
*/
public Expression getExpression() {
return expression;
}
/**
* @deprecated see {@link #getExpression()}
*/
public Expression getExpr() {
return expression;
}
/**
* Sets the expression of this unary operation.
*
* @param expression the new expression node
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
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);
}
final 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);
}
/**
* the operation type - one of {@link #OP_MINUS}, {@link #OP_NOT},
* {@link #OP_PLUS}, {@link #OP_TILDA}
* @return operation type
*/
public int getOperator() {
return operator;
}
/*
* (non-Javadoc)
* @see org2.eclipse.php.internal.core.ast.nodes.IOperationNode#getOperationString()
*/
public String getOperationString() {
return getOperator(this.getOperator());
}
/* (non-Javadoc)
* @see org2.eclipse.php.internal.core.ast.nodes.IOperationNode#getOperationString(int)
*/
public String getOperationString(int op) {
return getOperator(op);
}
/**
* Sets the operator of this unary operation
*
* @param new operator of this unary operation
* @exception IllegalArgumentException if:
* <ul>
* <li>the node belongs to a different AST</li>
* <li>the node already has a parent</li>
* <li>a cycle in would be created</li>
* </ul>
*/
public final void setOperator(int value) {
if (getOperator(value) == null) {
throw new IllegalArgumentException();
}
preValueChange(OPERATOR_PROPERTY);
this.operator = value;
postValueChange(OPERATOR_PROPERTY);
}
/* (omit javadoc for this method)
* Method declared on ASTNode.
*/
final int internalGetSetIntProperty(SimplePropertyDescriptor property, boolean get, int value) {
if (property == OPERATOR_PROPERTY) {
if (get) {
return getOperator();
} else {
setOperator((Integer) value);
return 0;
}
}
// allow default implementation to flag the error
return super.internalGetSetIntProperty(property, get, value);
}
/*
* Method declared on ASTNode.
*/
public boolean subtreeMatch(ASTMatcher matcher, Object other) {
// dispatch to correct overloaded match method
return matcher.match(this, other);
}
@Override
ASTNode clone0(AST target) {
final Expression expression = ASTNode.copySubtree(target, this.getExpression());
final UnaryOperation result = new UnaryOperation(this.getStart(), this.getEnd(), target, expression, this.getOperator());
return result;
}
@Override
List<StructuralPropertyDescriptor> internalStructuralPropertiesForType(PHPVersion apiLevel) {
return PROPERTY_DESCRIPTORS;
}
}