001    /*
002     * Copyright 2010-2013 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.jet.asJava;
018    
019    import com.intellij.lang.Language;
020    import com.intellij.psi.*;
021    import com.intellij.psi.impl.light.LightElement;
022    import org.jetbrains.annotations.NotNull;
023    
024    import java.util.ArrayList;
025    import java.util.List;
026    
027    // Copy of com.intellij.psi.impl.light.LightParameterListBuilder
028    public class LightParameterListBuilder extends LightElement implements PsiParameterList {
029        private final List<PsiParameter> myParameters = new ArrayList<PsiParameter>();
030        private PsiParameter[] myCachedParameters;
031    
032        public LightParameterListBuilder(PsiManager manager, Language language) {
033            super(manager, language);
034        }
035    
036        public void addParameter(PsiParameter parameter) {
037            myParameters.add(parameter);
038            myCachedParameters = null;
039        }
040    
041        @Override
042        public String toString() {
043            return "Light parameter lsit";
044        }
045    
046        @NotNull
047        @Override
048        public PsiParameter[] getParameters() {
049            if (myCachedParameters == null) {
050                if (myParameters.isEmpty()) {
051                    myCachedParameters = PsiParameter.EMPTY_ARRAY;
052                }
053                else {
054                    myCachedParameters = myParameters.toArray(new PsiParameter[myParameters.size()]);
055                }
056            }
057    
058            return myCachedParameters;
059        }
060    
061        @Override
062        public int getParameterIndex(PsiParameter parameter) {
063            return myParameters.indexOf(parameter);
064        }
065    
066        @Override
067        public int getParametersCount() {
068            return myParameters.size();
069        }
070    
071        @Override
072        public void accept(@NotNull PsiElementVisitor visitor) {
073            if (visitor instanceof JavaElementVisitor) {
074                ((JavaElementVisitor) visitor).visitParameterList(this);
075            }
076        }
077    }