PrologScriptEngineFactory.java
/*-
* #%L
* prolobjectlink-jpi
* %%
* Copyright (C) 2012 - 2019 Prolobjectlink Project
* %%
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
* #L%
*/
package io.github.prolobjectlink.prolog;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;
/**
* Partial implementation of {@link ScriptEngineFactory}
*
* @author Jose Zalacain
* @since 1.0
*/
public abstract class PrologScriptEngineFactory implements ScriptEngineFactory {
private final PrologEngine engine;
public PrologScriptEngineFactory(PrologEngine engine) {
this.engine = engine;
}
public final String getEngineName() {
return engine.getName();
}
public final String getEngineVersion() {
return engine.getVersion();
}
public final List<String> getExtensions() {
return Arrays.asList("pro", "pl");
}
public final List<String> getMimeTypes() {
return Arrays.asList("text/plain");
}
public final List<String> getNames() {
return Arrays.asList(getEngineName(), "Prolog", "prolog");
}
public final String getLanguageName() {
return "Prolog";
}
public final String getLanguageVersion() {
return engine.getVersion();
}
public final Object getParameter(String key) {
if (key.equals(ScriptEngine.ENGINE)) {
return getEngineName();
} else if (key.equals(ScriptEngine.ENGINE_VERSION)) {
return getEngineVersion();
} else if (key.equals(ScriptEngine.LANGUAGE)) {
return getLanguageName();
} else if (key.equals(ScriptEngine.LANGUAGE_VERSION)) {
return getLanguageVersion();
} else if (key.equals(ScriptEngine.NAME)) {
return getEngineName();
}
return null;
}
public final String getOutputStatement(String toDisplay) {
return "write('" + toDisplay + "')";
}
public final String getProgram(String... statements) {
StringBuilder b = new StringBuilder();
Iterator<String> i = new ArrayIterator<String>(statements);
if (i.hasNext()) {
while (i.hasNext()) {
b.append(i.next());
if (i.hasNext()) {
b.append(".\n");
}
}
b.append('.');
}
return "" + b + "";
}
public final ScriptEngine getScriptEngine() {
return new PrologScriptEngine(this, engine);
}
@Override
public String toString() {
return "PrologScriptEngineFactory [engine=" + engine + "]";
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((engine == null) ? 0 : engine.getName().hashCode());
result = prime * result + ((engine == null) ? 0 : engine.getVersion().hashCode());
return result;
}
@Override
public boolean equals(Object object) {
if (this == object)
return true;
if (object == null)
return false;
if (getClass() != object.getClass())
return false;
PrologScriptEngineFactory other = (PrologScriptEngineFactory) object;
if (engine == null) {
if (other.engine != null)
return false;
} else if (!engine.getName().equals(other.engine.getName())) {
return false;
} else if (!engine.getVersion().equals(other.engine.getVersion())) {
return false;
}
return true;
}
}