org.summer.dsl.xbase.ui.contentassist.ParameterData.java Source code

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Here is the source code for org.summer.dsl.xbase.ui.contentassist.ParameterData.java

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/*******************************************************************************
 * Copyright (c) 2012 itemis AG (http://www.itemis.eu) and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *******************************************************************************/
package org.summer.dsl.xbase.ui.contentassist;

import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import org.eclipse.xtext.util.Pair;
import org.eclipse.xtext.util.Tuples;

import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.Lists;

/**
 * @author Sebastian Zarnekow - Initial contribution and API
 * @noextend This class is not intended to be subclassed by clients.
 * @noinstantiate This class is not intended to be instantiated by clients.
 */
public class ParameterData {

    private List<Pair<String, Boolean>> variants = Lists.newArrayList();
    private boolean sorted = false;
    private String cachedDisplayString;

    public String getDisplayString() {
        if (cachedDisplayString == null) {
            sort();
            cachedDisplayString = Joiner.on('\n').join(getRawDisplayString());
        }
        return cachedDisplayString;
    }

    private void sort() {
        if (sorted)
            return;
        Collections.sort(variants, new Comparator<Pair<String, Boolean>>() {
            public int compare(Pair<String, Boolean> o1, Pair<String, Boolean> o2) {
                return o1.getFirst().compareTo(o2.getFirst());
            }
        });
        sorted = true;
    }

    public void addOverloaded(String string, boolean varArgs) {
        cachedDisplayString = null;
        sorted = false;
        Pair<String, Boolean> newVariant = Tuples.create(string, varArgs);
        if (!variants.contains(newVariant))
            variants.add(newVariant);
    }

    public boolean isVarArgs(int variant) {
        return variants.get(variant).getSecond();
    }

    public List<String> getRawDisplayString() {
        sort();
        return Lists.transform(variants, new Function<Pair<String, Boolean>, String>() {
            public String apply(Pair<String, Boolean> input) {
                return input.getFirst();
            }
        });
    }

}