5a17acfd70
git-svn-id: http://google-refine.googlecode.com/svn/trunk@1613 7d457c2a-affb-35e4-300a-418c747d4874
72 lines
2.7 KiB
Java
72 lines
2.7 KiB
Java
/*
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Copyright 2010, Google Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following disclaimer
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in the documentation and/or other materials provided with the
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distribution.
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* Neither the name of Google Inc. nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.google.refine.operations;
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import org.json.JSONException;
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import org.json.JSONObject;
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import com.google.refine.browsing.Engine;
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import com.google.refine.model.AbstractOperation;
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import com.google.refine.model.Project;
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import com.google.refine.util.ParsingUtilities;
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abstract public class EngineDependentOperation extends AbstractOperation {
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final private String _engineConfigString;
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transient protected JSONObject _engineConfig;
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protected EngineDependentOperation(JSONObject engineConfig) {
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_engineConfig = engineConfig;
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_engineConfigString = engineConfig == null || engineConfig.length() == 0
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? null : engineConfig.toString();
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}
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protected Engine createEngine(Project project) throws Exception {
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Engine engine = new Engine(project);
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engine.initializeFromJSON(getEngineConfig());
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return engine;
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}
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protected JSONObject getEngineConfig() {
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if (_engineConfig == null && _engineConfigString != null) {
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try {
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_engineConfig = ParsingUtilities.evaluateJsonStringToObject(_engineConfigString);
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} catch (JSONException e) {
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// ignore
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}
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}
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return _engineConfig;
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}
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}
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