com.talis.entity.TestUtils.java Source code

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Here is the source code for com.talis.entity.TestUtils.java

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/*
 *    Copyright 2012 Talis Systems Ltd
 * 
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 * 
 *        http://www.apache.org/licenses/LICENSE-2.0
 * 
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package com.talis.entity;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashSet;

import org.apache.commons.io.FileUtils;
import org.openjena.riot.out.OutputLangUtils;

import com.hp.hpl.jena.graph.Node;
import com.hp.hpl.jena.sparql.core.Quad;

public class TestUtils {

    public static Collection<Quad> getQuads(Node graph, Node subject, int num) {
        Collection<Quad> quads = new ArrayList<Quad>();
        for (int i = 0; i < num; i++) {
            quads.add(new Quad(graph, subject, Node.createURI("http://example.com/p"),
                    Node.createURI("http://example.com/o" + i)));
        }
        return quads;
    }

    public static void printQuads(Iterable<Quad> quads) {
        PrintWriter out = new PrintWriter(System.out);
        for (Quad quad : quads) {
            OutputLangUtils.output(out, quad, null, null);
        }
        out.flush();
    }

    public static void assertQuadIterablesEqual(Iterable<Quad> first, Iterable<Quad> second) {
        Collection<Quad> a = new HashSet<Quad>();
        for (Quad q : first) {
            a.add(q);
        }
        Collection<Quad> b = new HashSet<Quad>();
        for (Quad q : second) {
            b.add(q);
        }
        assertQuadCollectionsEqual(a, b);
    }

    public static void assertQuadCollectionsEqual(Collection<Quad> first, Collection<Quad> second) {
        assertEquals(first.size(), second.size());
        assertTrue(first.containsAll(second));
    }

    public static void tryForceGC() {
        Runtime r = Runtime.getRuntime();
        for (int i = 0; i < 10; i++) {
            r.gc();
        }
    }

    public static void showMemory() {
        Runtime r = Runtime.getRuntime();
        long bytes = r.totalMemory() - r.freeMemory();
        System.out.println(String.format("Memory usage : %s (%s)", FileUtils.byteCountToDisplaySize(bytes), bytes));
    }
}