import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
public void testJsonEscapeEncoder() {
    final ScriptEngineService engine = new MustacheScriptEngineService();
    final Map<String, String> params = randomBoolean() ? singletonMap(Script.CONTENT_TYPE_OPTION, JSON_MIME_TYPE) : emptyMap();

    Mustache script = (Mustache) engine.compile(null, "{\"field\": \"{{value}}\"}", params);
    CompiledScript compiled = new CompiledScript(INLINE, null, MustacheScriptEngineService.NAME, script);

    ExecutableScript executable = engine.executable(compiled, singletonMap("value", "a \"value\""));
    BytesReference result = (BytesReference) executable.run();
    assertThat(result.utf8ToString(), equalTo("{\"field\": \"a \\\"value\\\"\"}"));
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
public void testDefaultEncoder() {
    final ScriptEngineService engine = new MustacheScriptEngineService();
    final Map<String, String> params = singletonMap(Script.CONTENT_TYPE_OPTION, PLAIN_TEXT_MIME_TYPE);

    Mustache script = (Mustache) engine.compile(null, "{\"field\": \"{{value}}\"}", params);
    CompiledScript compiled = new CompiledScript(INLINE, null, MustacheScriptEngineService.NAME, script);

    ExecutableScript executable = engine.executable(compiled, singletonMap("value", "a \"value\""));
    BytesReference result = (BytesReference) executable.run();
    assertThat(result.utf8ToString(), equalTo("{\"field\": \"a \"value\"\"}"));
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
public void testUrlEncoder() {
    final ScriptEngineService engine = new MustacheScriptEngineService();
    final Map<String, String> params = singletonMap(Script.CONTENT_TYPE_OPTION, X_WWW_FORM_URLENCODED_MIME_TYPE);

    Mustache script = (Mustache) engine.compile(null, "{\"field\": \"{{value}}\"}", params);
    CompiledScript compiled = new CompiledScript(INLINE, null, MustacheScriptEngineService.NAME, script);

    ExecutableScript executable = engine.executable(compiled, singletonMap("value", "tilde~ AND date:[2016 FROM*]"));
    BytesReference result = (BytesReference) executable.run();
    assertThat(result.utf8ToString(), equalTo("{\"field\": \"tilde%7E+AND+date%3A%5B2016+FROM*%5D\"}"));
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new ExpressionScriptEngineService(settings);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new MustacheScriptEngineService();
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new PainlessScriptEngineService(settings);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
/**
 * Returns a {@link ScriptEngineService} instance or <code>null</code> if this plugin doesn't add a new script engine
 */
default ScriptEngineService getScriptEngineService(Settings settings) {
    return null;
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new PutFieldValuesScriptEngine();
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new ExtractFieldScriptEngine();
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new FieldValueScriptEngine();
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new DummyTemplateScriptEngine();
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
public final ScriptEngineService getScriptEngineService(Settings settings) {
    return new VectorScoringScriptEngineService(settings);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    // you can add a new script engine, or you can use settings to get defined values
    // String redisHost = settings.get("redis.host", "127.0.0.1");
    return null;
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new RankLibScriptEngine(settings, parserFactory);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(Settings settings) {
    return new PMMLModelScriptEngineService(settings);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(final Settings settings) {
    return new DiversitySortScriptEngineService(settings);
}
 

import org.elasticsearch.script.ScriptEngineService; //导入依赖的package包/类
@Override
public ScriptEngineService getScriptEngineService(final Settings settings) {
    scriptEngineService = new VelocityScriptEngineService(settings);
    return scriptEngineService;
}