JavaVector.java

/*
 * Copyright © 2011, 2012, 2013 On-Site.com.
 * Copyright © 2015 Chris Jester-Young.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2 of the License, or (at your
 * option) any later version.
 *
 * This code 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this work. If not, see <http://www.gnu.org/licenses/>.
 *
 * Linking this library statically or dynamically with other modules is
 * making a combined work based on this library. Thus, the terms and
 * conditions of the GNU General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this library give you
 * permission to link this library with independent modules to produce an
 * executable, regardless of the license terms of these independent modules,
 * and to copy and distribute the resulting executable under terms of your
 * choice, provided that you also meet, for each linked independent module,
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package com.sun.tools.hat.internal.lang.openjdk;

import java.util.Arrays;
import java.util.List;

import com.google.common.base.Suppliers;
import com.google.common.collect.ImmutableList;

import com.sun.tools.hat.internal.lang.Models;
import com.sun.tools.hat.internal.lang.common.SimpleCollectionModel;
import com.sun.tools.hat.internal.model.JavaInt;
import com.sun.tools.hat.internal.model.JavaObject;
import com.sun.tools.hat.internal.model.JavaObjectArray;
import com.sun.tools.hat.internal.model.JavaThing;

public class JavaVector extends SimpleCollectionModel {
    private JavaVector(OpenJDK factory, List<JavaThing> items) {
        super(factory, Suppliers.ofInstance(ImmutableList.copyOf(items)));
    }

    public static JavaVector make(OpenJDK factory, JavaObject vec, String sizeField) {
        JavaThing[] data = Models.getFieldThing(vec, "elementData",
                JavaObjectArray.class).getElements();
        JavaInt size = Models.getFieldThing(vec, sizeField, JavaInt.class);
        return data == null || size == null ? null
                : new JavaVector(factory, Arrays.asList(data).subList(0, size.value));
    }
}