Example usage for org.apache.lucene.expressions.js JavascriptCompiler compile

Introduction

In this page you can find the example usage for org.apache.lucene.expressions.js JavascriptCompiler compile.

Prototype

public static Expression compile(String sourceText, Map<String, Method> functions, ClassLoader parent)
        throws ParseException 

Source Link

Document

Compiles the given expression with the supplied custom functions.

Usage

From source file:com.o19s.es.ltr.utils.Scripting.java

License:Apache License

public static Object compile(String scriptSource) {
    // classloader created here
    final SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new SpecialPermission());
    }//from  ww  w .j  a  v a2 s . c  o m
    return AccessController.doPrivileged(new PrivilegedAction<Expression>() {
        @Override
        public Expression run() {
            try {
                // snapshot our context here, we check on behalf of the expression
                AccessControlContext engineContext = AccessController.getContext();
                ClassLoader loader = getClass().getClassLoader();
                if (sm != null) {
                    loader = new ClassLoader(loader) {
                        @Override
                        protected Class<?> loadClass(String name, boolean resolve)
                                throws ClassNotFoundException {
                            try {
                                engineContext.checkPermission(new ClassPermission(name));
                            } catch (SecurityException e) {
                                throw new ClassNotFoundException(name, e);
                            }
                            return super.loadClass(name, resolve);
                        }
                    };
                }
                // NOTE: validation is delayed to allow runtime vars, and we don't have access to per index stuff here
                return JavascriptCompiler.compile(scriptSource, JavascriptCompiler.DEFAULT_FUNCTIONS, loader);
            } catch (ParseException e) {
                throw convertToScriptException("compile error", scriptSource, scriptSource, e);
            }
        }
    });
}

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From source file:org.elasticsearch.script.expression.ExpressionScriptEngine.java

License:Apache License

@Override
public <T> T compile(String scriptName, String scriptSource, ScriptContext<T> context,
        Map<String, String> params) {
    // classloader created here
    final SecurityManager sm = System.getSecurityManager();
    SpecialPermission.check();/*from  ww w.  j  a va 2 s . co m*/
    Expression expr = AccessController.doPrivileged(new PrivilegedAction<Expression>() {
        @Override
        public Expression run() {
            try {
                // snapshot our context here, we check on behalf of the expression
                AccessControlContext engineContext = AccessController.getContext();
                ClassLoader loader = getClass().getClassLoader();
                if (sm != null) {
                    loader = new ClassLoader(loader) {
                        @Override
                        protected Class<?> loadClass(String name, boolean resolve)
                                throws ClassNotFoundException {
                            try {
                                engineContext.checkPermission(new ClassPermission(name));
                            } catch (SecurityException e) {
                                throw new ClassNotFoundException(name, e);
                            }
                            return super.loadClass(name, resolve);
                        }
                    };
                }
                // NOTE: validation is delayed to allow runtime vars, and we don't have access to per index stuff here
                return JavascriptCompiler.compile(scriptSource, JavascriptCompiler.DEFAULT_FUNCTIONS, loader);
            } catch (ParseException e) {
                throw convertToScriptException("compile error", scriptSource, scriptSource, e);
            }
        }
    });
    if (context.instanceClazz.equals(SearchScript.class)) {
        SearchScript.Factory factory = (p, lookup) -> newSearchScript(expr, lookup, p);
        return context.factoryClazz.cast(factory);
    } else if (context.instanceClazz.equals(ExecutableScript.class)) {
        ExecutableScript.Factory factory = (p) -> new ExpressionExecutableScript(expr, p);
        return context.factoryClazz.cast(factory);
    } else if (context.instanceClazz.equals(FilterScript.class)) {
        FilterScript.Factory factory = (p, lookup) -> newFilterScript(expr, lookup, p);
        return context.factoryClazz.cast(factory);
    }
    throw new IllegalArgumentException(
            "expression engine does not know how to handle script context [" + context.name + "]");
}

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From source file:org.elasticsearch.script.expression.ExpressionScriptEngineService.java

License:Apache License

@Override
public Object compile(final String script, Map<String, String> params) {
    // classloader created here
    final SecurityManager sm = System.getSecurityManager();
    if (sm != null) {
        sm.checkPermission(new SpecialPermission());
    }// www. jav a  2  s.com
    return AccessController.doPrivileged(new PrivilegedAction<Expression>() {
        @Override
        public Expression run() {
            try {
                // snapshot our context here, we check on behalf of the expression
                final AccessControlContext engineContext = AccessController.getContext();
                ClassLoader loader = getClass().getClassLoader();
                if (sm != null) {
                    loader = new ClassLoader(loader) {
                        @Override
                        protected Class<?> loadClass(String name, boolean resolve)
                                throws ClassNotFoundException {
                            try {
                                engineContext.checkPermission(new ClassPermission(name));
                            } catch (SecurityException e) {
                                throw new ClassNotFoundException(name, e);
                            }
                            return super.loadClass(name, resolve);
                        }
                    };
                }
                // NOTE: validation is delayed to allow runtime vars, and we don't have access to per index stuff here
                return JavascriptCompiler.compile(script, JavascriptCompiler.DEFAULT_FUNCTIONS, loader);
            } catch (ParseException e) {
                throw new ScriptException("Failed to parse expression: " + script, e);
            }
        }
    });
}

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