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;
018    
019    import com.intellij.lang.ASTNode;
020    import com.intellij.psi.tree.IElementType;
021    import org.jetbrains.annotations.NonNls;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.kotlin.idea.KotlinLanguage;
024    import org.jetbrains.kotlin.psi.KtElement;
025    import org.jetbrains.kotlin.psi.KtElementImpl;
026    
027    import java.lang.reflect.Constructor;
028    
029    public class KtNodeType extends IElementType {
030        private Constructor<? extends KtElement> myPsiFactory;
031    
032        public KtNodeType(@NotNull @NonNls String debugName) {
033            this(debugName, null);
034        }
035    
036        public KtNodeType(@NotNull @NonNls String debugName, Class<? extends KtElement> psiClass) {
037            super(debugName, KotlinLanguage.INSTANCE);
038            try {
039                myPsiFactory = psiClass != null ? psiClass.getConstructor(ASTNode.class) : null;
040            } catch (NoSuchMethodException e) {
041                throw new RuntimeException("Must have a constructor with ASTNode");
042            }
043        }
044    
045        public KtElement createPsi(ASTNode node) {
046            assert node.getElementType() == this;
047    
048            try {
049                if (myPsiFactory == null) {
050                    return new KtElementImpl(node);
051                }
052                return myPsiFactory.newInstance(node);
053            } catch (Exception e) {
054                throw new RuntimeException("Error creating psi element for node", e);
055            }
056        }
057    }