org.drools.mvel.parser.ast.expr.NullSafeFieldAccessExpr Maven / Gradle / Ivy
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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
* Copyright 2019 Red Hat, Inc. and/or its affiliates.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* Modified by Red Hat, Inc.
*/
package org.drools.mvel.parser.ast.expr;
import java.util.Optional;
import com.github.javaparser.TokenRange;
import com.github.javaparser.ast.AllFieldsConstructor;
import com.github.javaparser.ast.Generated;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.expr.Expression;
import com.github.javaparser.ast.expr.SimpleName;
import com.github.javaparser.ast.expr.ThisExpr;
import com.github.javaparser.ast.nodeTypes.NodeWithScope;
import com.github.javaparser.ast.nodeTypes.NodeWithSimpleName;
import com.github.javaparser.ast.nodeTypes.NodeWithTypeArguments;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.ast.type.Type;
import com.github.javaparser.ast.visitor.CloneVisitor;
import com.github.javaparser.resolution.UnsolvedSymbolException;
import org.drools.mvel.parser.ast.visitor.DrlGenericVisitor;
import org.drools.mvel.parser.ast.visitor.DrlVoidVisitor;
import com.github.javaparser.ast.visitor.GenericVisitor;
import com.github.javaparser.ast.visitor.VoidVisitor;
import com.github.javaparser.metamodel.FieldAccessExprMetaModel;
import com.github.javaparser.metamodel.JavaParserMetaModel;
import com.github.javaparser.metamodel.OptionalProperty;
import com.github.javaparser.resolution.Resolvable;
import com.github.javaparser.resolution.declarations.ResolvedValueDeclaration;
import static com.github.javaparser.utils.Utils.assertNotNull;
public class NullSafeFieldAccessExpr extends Expression implements NodeWithSimpleName,
NodeWithTypeArguments,
NodeWithScope,
Resolvable {
private Expression scope;
@OptionalProperty
private NodeList typeArguments;
private SimpleName name;
public NullSafeFieldAccessExpr() {
this(null, new ThisExpr(), null, new SimpleName());
}
public NullSafeFieldAccessExpr(final Expression scope, final String name) {
this(null, scope, null, new SimpleName(name));
}
@AllFieldsConstructor
public NullSafeFieldAccessExpr(final Expression scope, final NodeList typeArguments, final SimpleName name) {
this(null, scope, typeArguments, name);
}
/**
* This constructor is used by the parser and is considered private.
*/
@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
public NullSafeFieldAccessExpr(TokenRange tokenRange, Expression scope, NodeList typeArguments, SimpleName name) {
super(tokenRange);
setScope(scope);
setTypeArguments(typeArguments);
setName(name);
customInitialization();
}
@Override
public R accept(GenericVisitor v, A arg) {
return ((DrlGenericVisitor)v).visit(this, arg);
}
@Override
public void accept(VoidVisitor v, A arg) {
((DrlVoidVisitor)v).visit(this, arg);
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public SimpleName getName() {
return name;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public NullSafeFieldAccessExpr setName(final SimpleName name) {
assertNotNull(name);
if (name == this.name) {
return (NullSafeFieldAccessExpr) this;
}
notifyPropertyChange(ObservableProperty.NAME, this.name, name);
if (this.name != null) {
this.name.setParentNode(null);
}
this.name = name;
setAsParentNodeOf(name);
return this;
}
/**
* Use {@link #getName} instead.
*/
@Deprecated
public SimpleName getField() {
return name;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public Expression getScope() {
return scope;
}
/**
* Use {@link #setName} with new SimpleName(field) instead.
*/
@Deprecated
public NullSafeFieldAccessExpr setField(final String field) {
setName(new SimpleName(field));
return this;
}
/**
* Use {@link #setName} instead.
*/
@Deprecated
public NullSafeFieldAccessExpr setFieldExpr(SimpleName inner) {
return setName(inner);
}
/**
* Sets the scope
*
* @param scope the scope, can not be null
* @return this, the NullSafeFieldAccessExpr
*/
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public NullSafeFieldAccessExpr setScope(final Expression scope) {
assertNotNull(scope);
if (scope == this.scope) {
return (NullSafeFieldAccessExpr) this;
}
notifyPropertyChange(ObservableProperty.SCOPE, this.scope, scope);
if (this.scope != null) {
this.scope.setParentNode(null);
}
this.scope = scope;
setAsParentNodeOf(scope);
return this;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public Optional> getTypeArguments() {
return Optional.ofNullable(typeArguments);
}
/**
* Sets the type arguments
*
* @param typeArguments the type arguments, can be null
* @return this, the NullSafeFieldAccessExpr
*/
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public NullSafeFieldAccessExpr setTypeArguments(final NodeList typeArguments) {
if (typeArguments == this.typeArguments) {
return (NullSafeFieldAccessExpr) this;
}
notifyPropertyChange(ObservableProperty.TYPE_ARGUMENTS, this.typeArguments, typeArguments);
if (this.typeArguments != null) {
this.typeArguments.setParentNode(null);
}
this.typeArguments = typeArguments;
setAsParentNodeOf(typeArguments);
return this;
}
@Override
@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
public NullSafeFieldAccessExpr clone() {
return (NullSafeFieldAccessExpr) accept(new CloneVisitor(), null);
}
@Override
@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
public FieldAccessExprMetaModel getMetaModel() {
return JavaParserMetaModel.fieldAccessExprMetaModel;
}
@Override
@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
public boolean remove(Node node) {
if (node == null) {
return false;
}
if (typeArguments != null) {
for (int i = 0; i < typeArguments.size(); i++) {
if (typeArguments.get(i) == node) {
typeArguments.remove(i);
return true;
}
}
}
return super.remove(node);
}
@Override
@Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator")
public boolean replace(Node node, Node replacementNode) {
if (node == null) {
return false;
}
if (node == name) {
setName((SimpleName) replacementNode);
return true;
}
if (node == scope) {
setScope((Expression) replacementNode);
return true;
}
if (typeArguments != null) {
for (int i = 0; i < typeArguments.size(); i++) {
if (typeArguments.get(i) == node) {
typeArguments.set(i, (Type) replacementNode);
return true;
}
}
}
return super.replace(node, replacementNode);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public boolean isFieldAccessExpr() {
return true;
}
/**
* Attempts to resolve the declaration corresponding to the accessed field. If successful, a
* {@link ResolvedValueDeclaration} representing the declaration of the value accessed by this
* {@code NullSafeFieldAccessExpr} is returned. Otherwise, an {@link UnsolvedSymbolException} is thrown.
*
* @return a {@link ResolvedValueDeclaration} representing the declaration of the accessed value.
* @throws UnsolvedSymbolException if the declaration corresponding to the field access expression could not be
* resolved.
* @see NameExpr#resolve()
* @see MethodCallExpr#resolve()
* @see ObjectCreationExpr#resolve()
* @see ExplicitConstructorInvocationStmt#resolve()
*/
@Override
public ResolvedValueDeclaration resolve() {
return getSymbolResolver().resolveDeclaration(this, ResolvedValueDeclaration.class);
}
/**
* Indicate if this NullSafeFieldAccessExpr is an element directly contained in a larger NullSafeFieldAccessExpr.
*/
public boolean isInternal() {
Optional parentNode = this.getParentNode();
return parentNode.isPresent() && parentNode.get() instanceof NullSafeFieldAccessExpr;
}
/**
* Indicate if this NullSafeFieldAccessExpr is top level, i.e., it is not directly contained in a larger NullSafeFieldAccessExpr.
*/
public boolean isTopLevel() {
return !isInternal();
}
}