001 /*
002 * Copyright 2010-2015 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017 package org.jetbrains.kotlin.psi;
018
019 import com.intellij.lang.ASTNode;
020 import com.intellij.navigation.ItemPresentation;
021 import com.intellij.navigation.ItemPresentationProviders;
022 import com.intellij.psi.PsiElement;
023 import org.jetbrains.annotations.NotNull;
024 import org.jetbrains.annotations.Nullable;
025 import org.jetbrains.kotlin.lexer.JetTokens;
026 import org.jetbrains.kotlin.psi.stubs.KotlinParameterStub;
027 import org.jetbrains.kotlin.psi.stubs.elements.JetStubElementTypes;
028 import org.jetbrains.kotlin.psi.typeRefHelpers.TypeRefHelpersPackage;
029
030 import java.util.Collections;
031 import java.util.List;
032
033 public class JetParameter extends JetNamedDeclarationStub<KotlinParameterStub> implements JetCallableDeclaration {
034
035 public JetParameter(@NotNull ASTNode node) {
036 super(node);
037 }
038
039 public JetParameter(@NotNull KotlinParameterStub stub) {
040 super(stub, JetStubElementTypes.VALUE_PARAMETER);
041 }
042
043 @Override
044 public <R, D> R accept(@NotNull JetVisitor<R, D> visitor, D data) {
045 return visitor.visitParameter(this, data);
046 }
047
048 @Override
049 @Nullable
050 public JetTypeReference getTypeReference() {
051 return getStubOrPsiChild(JetStubElementTypes.TYPE_REFERENCE);
052 }
053
054 @Override
055 @Nullable
056 public JetTypeReference setTypeReference(@Nullable JetTypeReference typeRef) {
057 return TypeRefHelpersPackage.setTypeReference(this, getNameIdentifier(), typeRef);
058 }
059
060 @Nullable
061 @Override
062 public PsiElement getColon() {
063 return findChildByType(JetTokens.COLON);
064 }
065
066 public boolean hasDefaultValue() {
067 KotlinParameterStub stub = getStub();
068 if (stub != null) {
069 return stub.hasDefaultValue();
070 }
071 return getDefaultValue() != null;
072 }
073
074 @Nullable
075 public JetExpression getDefaultValue() {
076 KotlinParameterStub stub = getStub();
077 if (stub != null && !stub.hasDefaultValue()) {
078 return null;
079 }
080 boolean passedEQ = false;
081 ASTNode child = getNode().getFirstChildNode();
082 while (child != null) {
083 if (child.getElementType() == JetTokens.EQ) passedEQ = true;
084 if (passedEQ && child.getPsi() instanceof JetExpression) {
085 return (JetExpression) child.getPsi();
086 }
087 child = child.getTreeNext();
088 }
089
090 return null;
091 }
092
093 public boolean isMutable() {
094 KotlinParameterStub stub = getStub();
095 if (stub != null) {
096 return stub.isMutable();
097 }
098
099 return findChildByType(JetTokens.VAR_KEYWORD) != null;
100 }
101
102 public boolean isVarArg() {
103 JetModifierList modifierList = getModifierList();
104 return modifierList != null && modifierList.hasModifier(JetTokens.VARARG_KEYWORD);
105 }
106
107 public boolean hasValOrVarNode() {
108 KotlinParameterStub stub = getStub();
109 if (stub != null) {
110 return stub.hasValOrVarNode();
111 }
112 return getValOrVarNode() != null;
113 }
114
115 @Nullable
116 public ASTNode getValOrVarNode() {
117 KotlinParameterStub stub = getStub();
118 if (stub != null && !stub.hasValOrVarNode()) {
119 return null;
120 }
121 ASTNode val = getNode().findChildByType(JetTokens.VAL_KEYWORD);
122 if (val != null) return val;
123
124 return getNode().findChildByType(JetTokens.VAR_KEYWORD);
125 }
126
127 @Override
128 public ItemPresentation getPresentation() {
129 return ItemPresentationProviders.getItemPresentation(this);
130 }
131
132 public boolean isLoopParameter() {
133 return getParent() instanceof JetForExpression;
134 }
135
136 @Nullable
137 @Override
138 public JetParameterList getValueParameterList() {
139 return null;
140 }
141
142 @NotNull
143 @Override
144 public List<JetParameter> getValueParameters() {
145 return Collections.emptyList();
146 }
147
148 @Nullable
149 @Override
150 public JetTypeReference getReceiverTypeReference() {
151 return null;
152 }
153
154 @Nullable
155 @Override
156 public JetTypeParameterList getTypeParameterList() {
157 return null;
158 }
159
160 @Nullable
161 @Override
162 public JetTypeConstraintList getTypeConstraintList() {
163 return null;
164 }
165
166 @NotNull
167 @Override
168 public List<JetTypeConstraint> getTypeConstraints() {
169 return Collections.emptyList();
170 }
171
172 @NotNull
173 @Override
174 public List<JetTypeParameter> getTypeParameters() {
175 return Collections.emptyList();
176 }
177 }