/*
 * 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 javax.el;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

public abstract class ELContext {

    private Locale locale;

    private Map<Class<?>, Object> map;

    private boolean resolved;

    private ImportHandler importHandler = null;

    private List<EvaluationListener> listeners = new ArrayList<>();

    public ELContext() {
        this.resolved = false;
    }

    public void setPropertyResolved(boolean resolved) {
        this.resolved = resolved;
    }

    /**
     * @since EL 3.0
     */
    public void setPropertyResolved(Object base, Object property) {
        setPropertyResolved(true);
        notifyPropertyResolved(base, property);
    }

    public boolean isPropertyResolved() {
        return this.resolved;
    }

    // Can't use Class<?> because API needs to match specification
    public void putContext(@SuppressWarnings("rawtypes") Class key,
            Object contextObject) throws NullPointerException {
        if (key == null || contextObject == null) {
            throw new NullPointerException();
        }

        if (this.map == null) {
            this.map = new HashMap<>();
        }

        this.map.put(key, contextObject);
    }

    // Can't use Class<?> because API needs to match specification
    public Object getContext(@SuppressWarnings("rawtypes") Class key) {
        if (this.map == null) {
            return null;
        }
        return this.map.get(key);
    }

    public abstract ELResolver getELResolver();

    /**
     * @since EL 3.0
     */
    public ImportHandler getImportHandler() {
        if (importHandler == null) {
            importHandler = new ImportHandler();
        }
        return importHandler;
    }

    public abstract FunctionMapper getFunctionMapper();

    public Locale getLocale() {
        return this.locale;
    }

    public void setLocale(Locale locale) {
        this.locale = locale;
    }

    public abstract VariableMapper getVariableMapper();

    /**
     * @since EL 3.0
     */
    public void addEvaluationListener(EvaluationListener listener) {
        listeners.add(listener);
    }

    /**
     * @since EL 3.0
     */
    public List<EvaluationListener> getEvaluationListeners() {
        return listeners;
    }

    /**
     * @since EL 3.0
     */
    public void notifyBeforeEvaluation(String expression) {
        for (EvaluationListener listener : listeners) {
            try {
                listener.beforeEvaluation(this, expression);
            } catch (Throwable t) {
                Util.handleThrowable(t);
                // Ignore - no option to log
            }
        }
    }

    /**
     * @since EL 3.0
     */
    public void notifyAfterEvaluation(String expression) {
        for (EvaluationListener listener : listeners) {
            try {
                listener.afterEvaluation(this, expression);
            } catch (Throwable t) {
                Util.handleThrowable(t);
                // Ignore - no option to log
            }
        }
    }

    /**
     * @since EL 3.0
     */
    public void notifyPropertyResolved(Object base, Object property) {
        for (EvaluationListener listener : listeners) {
            try {
                listener.propertyResolved(this, base, property);
            } catch (Throwable t) {
                Util.handleThrowable(t);
                // Ignore - no option to log
            }
        }
    }

    /**
     * @since EL 3.0
     */
    public Object convertToType(Object obj, Class<?> type) {

        boolean originalResolved = isPropertyResolved();
        try {
            ELResolver resolver = getELResolver();
            Object result = resolver.convertToType(this, obj, type);
            if (isPropertyResolved()) {
                return result;
            }
        } finally {
            setPropertyResolved(originalResolved);
        }

        return Util.getExpressionFactory().coerceToType(type, type);
    }
}

@@ -860,23 +860,76 @@
 va.util.
-HashMap
+Deque;%0Aimport java.util.HashMap;%0Aimport java.util.LinkedList
 ;%0Aimport
@@ -1241,24 +1241,101 @@
 yList%3C%3E();%0A%0A
+    private Deque%3CMap%3CString,Object%3E%3E lambdaArguments = new LinkedList%3C%3E();%0A%0A
     public E
@@ -4408,32 +4408,890 @@
        %7D%0A    %7D%0A%0A
+    /**%0A     * @since EL 3.0%0A     */%0A    public boolean isLambdaArgument(String name) %7B%0A        for (Map%3CString,Object%3E arguments : lambdaArguments) %7B%0A            if (arguments.containsKey(name)) %7B%0A                return true;%0A            %7D%0A        %7D%0A        return false;%0A    %7D%0A%0A    /**%0A     * @since EL 3.0%0A     */%0A    public Object getLambdaArgument(String name) %7B%0A        for (Map%3CString,Object%3E arguments : lambdaArguments) %7B%0A            Object result = arguments.get(name);%0A            if (result != null) %7B%0A                return result;%0A            %7D%0A        %7D%0A        return null;%0A    %7D%0A%0A    /**%0A     * @since EL 3.0%0A     */%0A    public void enterLambdaScope(Map%3CString,Object%3E arguments) %7B%0A        lambdaArguments.push(arguments);%0A    %7D%0A%0A    /**%0A     * @since EL 3.0%0A     */%0A    public void exitLambdaScope() %7B%0A        lambdaArguments.pop();%0A    %7D%0A%0A
     /**%0A     * @

EL 3.0 Implement new methods