Package org.apache.marmotta.commons.sesame.test.base

Source Code of org.apache.marmotta.commons.sesame.test.base.RdfStringMatcher

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.marmotta.commons.sesame.test.base;

import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.openrdf.repository.Repository;
import org.openrdf.repository.RepositoryConnection;
import org.openrdf.repository.sail.SailRepository;
import org.openrdf.rio.RDFFormat;
import org.openrdf.sail.memory.MemoryStore;

import java.io.StringReader;

/**
* Match an RDF String (various Formats)
*/
public class RdfStringMatcher<T extends String> extends SesameMatcher<T> implements Matcher<T> {

    private final Matcher<? extends RepositoryConnection> delegate;
    private final String baseUri;
    private final RDFFormat format;

    public RdfStringMatcher(RDFFormat format, String baseUri, Matcher<? extends RepositoryConnection> delegate) {
        this.delegate = delegate;
        this.baseUri = baseUri;
        this.format = format;
    }

    @Override
    protected boolean matchesSafely(String rdfString) {
        if (baseUri == null) throw new IllegalArgumentException("baseUri must not be null");
        if (format == null) throw new IllegalArgumentException("format must not be null");

        try {
            Repository repo = new SailRepository(new MemoryStore());
            repo.initialize();
            try {
                final RepositoryConnection con = repo.getConnection();
                try (final StringReader r = new StringReader(rdfString)) {
                    con.begin();
                    con.add(r, baseUri, format);
                    con.commit();

                    con.begin();
                    final boolean result = delegate.matches(con);
                    con.commit();
                    return result;
                } catch (final Throwable t) {
                    con.rollback();
                    throw t;
                } finally {
                    con.close();
                }
            } finally {
                repo.shutDown();
            }
        } catch (RuntimeException r) {
            throw r;
        } catch (Exception e) {
            return false;
        }
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(format.getName()).appendText(" String ").appendDescriptionOf(delegate);
    }

    public static <T extends String> Matcher<T> wrap(RDFFormat format, String baseUri, Matcher<? extends RepositoryConnection> delegate) {
        return new RdfStringMatcher<T>(format, baseUri, delegate);
    }
}
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