com.sun.tools.hat.internal.lang.guava.GuavaCustConcHash.java Source code

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Here is the source code for com.sun.tools.hat.internal.lang.guava.GuavaCustConcHash.java

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/*
 * Copyright (c) 2011 On-Site.com.
 *
 * 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,
 * the terms and conditions of the license of that module. An independent
 * module is a module which is not derived from or based on this library.
 * If you modify this library, you may extend this exception to your
 * version of the library, but you are not obligated to do so. If you do
 * not wish to do so, delete this exception statement from your version.
 */

package com.sun.tools.hat.internal.lang.guava;

import java.util.List;
import java.util.Map;

import com.google.common.collect.ImmutableMap;
import com.sun.tools.hat.internal.lang.MapModel;
import com.sun.tools.hat.internal.lang.Models;
import com.sun.tools.hat.internal.model.JavaObject;
import com.sun.tools.hat.internal.model.JavaThing;

class GuavaCustConcHash extends MapModel {
    private final ImmutableMap<JavaThing, JavaThing> map;

    private GuavaCustConcHash(ImmutableMap<JavaThing, JavaThing> map) {
        this.map = map;
    }

    public static GuavaCustConcHash make(JavaObject chm) {
        List<JavaObject> segments = Models.getFieldObjectArray(chm, "segments", JavaObject.class);
        if (segments == null)
            return null;

        final ImmutableMap.Builder<JavaThing, JavaThing> builder = ImmutableMap.builder();
        for (JavaObject segment : segments) {
            JavaObject table = Models.getFieldObject(segment, "table");
            List<JavaObject> array = Models.getFieldObjectArray(table, "array", JavaObject.class);
            if (array != null) {
                for (JavaObject entry : array) {
                    // Strong keys use the "key" field
                    // Soft/weak keys use the "referent" field
                    JavaThing key = entry.getField("key");
                    if (key == null)
                        key = entry.getField("referent");
                    JavaObject valueReference = Models.getFieldObject(entry, "valueReference");
                    JavaThing value = valueReference.getField("referent");
                    if (key != null && value != null)
                        builder.put(key, value);
                }
            }
        }
        return new GuavaCustConcHash(builder.build());
    }

    @Override
    public Map<JavaThing, JavaThing> getMap() {
        return map;
    }
}