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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* 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.
*/
package com.github.javaparser.ast.type;
import com.github.javaparser.ast.AllFieldsConstructor;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.expr.AnnotationExpr;
import com.github.javaparser.ast.nodeTypes.NodeWithAnnotations;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.ast.visitor.GenericVisitor;
import com.github.javaparser.ast.visitor.VoidVisitor;
import java.util.Arrays;
import java.util.List;
import static com.github.javaparser.utils.Utils.assertNotNull;
import static java.util.stream.Collectors.joining;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.visitor.CloneVisitor;
import com.github.javaparser.metamodel.NonEmptyProperty;
import com.github.javaparser.metamodel.UnionTypeMetaModel;
import com.github.javaparser.metamodel.JavaParserMetaModel;
import javax.annotation.Generated;
import com.github.javaparser.TokenRange;
import com.github.javaparser.resolution.types.ResolvedReferenceType;
import com.github.javaparser.resolution.types.ResolvedUnionType;
import java.util.function.Consumer;
import java.util.Optional;
/**
* <h1>The union type</h1>
* Represents a set of types. A given value of this type has to be assignable to at least one of the element types.
* <h2>Java 1-6</h2>
* Does not exist.
* <h2>Java 7+</h2>
* As of Java 7 it is used in catch clauses.
* <pre><code>
* try {
* ...
* } catch(<b>IOException | NullPointerException ex</b>) {
* ...
* }
* </pre>
*
* The types that make up the union type are its "elements"
*/
public final class UnionType extends Type implements NodeWithAnnotations<UnionType> {
@NonEmptyProperty
private NodeList<ReferenceType> elements;
public UnionType() {
this(null, new NodeList<>());
}
/**
* This constructor is used by the parser and is considered private.
*/
@Generated("com.github.javaparser.generator.core.node.MainConstructorGenerator")
public UnionType(TokenRange tokenRange, NodeList<ReferenceType> elements) {
super(tokenRange);
setElements(elements);
customInitialization();
}
@AllFieldsConstructor
public UnionType(NodeList<ReferenceType> elements) {
this(null, elements);
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public NodeList<ReferenceType> getElements() {
return elements;
}
@Generated("com.github.javaparser.generator.core.node.PropertyGenerator")
public UnionType setElements(final NodeList<ReferenceType> elements) {
assertNotNull(elements);
if (elements == this.elements) {
return (UnionType) this;
}
notifyPropertyChange(ObservableProperty.ELEMENTS, this.elements, elements);
if (this.elements != null)
this.elements.setParentNode(null);
this.elements = elements;
setAsParentNodeOf(elements);
return this;
}
@Override
public UnionType setAnnotations(NodeList<AnnotationExpr> annotations) {
return (UnionType) super.setAnnotations(annotations);
}
@Override
@Generated("com.github.javaparser.generator.core.node.AcceptGenerator")
public <R, A> R accept(final GenericVisitor<R, A> v, final A arg) {
return v.visit(this, arg);
}
@Override
@Generated("com.github.javaparser.generator.core.node.AcceptGenerator")
public <A> void accept(final VoidVisitor<A> v, final A arg) {
v.visit(this, arg);
}
@Override
@Generated("com.github.javaparser.generator.core.node.RemoveMethodGenerator")
public boolean remove(Node node) {
if (node == null)
return false;
for (int i = 0; i < elements.size(); i++) {
if (elements.get(i) == node) {
elements.remove(i);
return true;
}
}
return super.remove(node);
}
@Override
public String asString() {
return elements.stream().map(Type::asString).collect(joining("|"));
}
@Override
@Generated("com.github.javaparser.generator.core.node.CloneGenerator")
public UnionType clone() {
return (UnionType) accept(new CloneVisitor(), null);
}
@Override
@Generated("com.github.javaparser.generator.core.node.GetMetaModelGenerator")
public UnionTypeMetaModel getMetaModel() {
return JavaParserMetaModel.unionTypeMetaModel;
}
@Override
@Generated("com.github.javaparser.generator.core.node.ReplaceMethodGenerator")
public boolean replace(Node node, Node replacementNode) {
if (node == null)
return false;
for (int i = 0; i < elements.size(); i++) {
if (elements.get(i) == node) {
elements.set(i, (ReferenceType) replacementNode);
return true;
}
}
return super.replace(node, replacementNode);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public boolean isUnionType() {
return true;
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public UnionType asUnionType() {
return this;
}
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public void ifUnionType(Consumer<UnionType> action) {
action.accept(this);
}
@Override
public ResolvedUnionType resolve() {
return getSymbolResolver().toResolvedType(this, ResolvedUnionType.class);
}
@Override
@Generated("com.github.javaparser.generator.core.node.TypeCastingGenerator")
public Optional<UnionType> toUnionType() {
return Optional.of(this);
}
}
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