/*
 * 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.HashMap;
import java.util.Map;

public class TesterBeanNameResolver extends BeanNameResolver {

    public static final String EXCEPTION_TRIGGER_NAME = "exception";
    public static final String THROWABLE_TRIGGER_NAME = "throwable";
    public static final String READ_ONLY_NAME = "readonly";

    private Map<String,Object> beans = new HashMap<>();
    private boolean allowCreate = true;


    public TesterBeanNameResolver() {
        beans.put(EXCEPTION_TRIGGER_NAME, new Object());
        beans.put(THROWABLE_TRIGGER_NAME, new Object());
        beans.put(READ_ONLY_NAME, new Object());
    }

    @Override
    public void setBeanValue(String beanName, Object value)
            throws PropertyNotWritableException {
        checkTriggers(beanName);
        if (allowCreate || beans.containsKey(beanName)) {
            beans.put(beanName, value);
        }
    }

    @Override
    public boolean isNameResolved(String beanName) {
        return beans.containsKey(beanName);
    }

    @Override
    public Object getBean(String beanName) {
        checkTriggers(beanName);
        return beans.get(beanName);
    }

    @Override
    public boolean canCreateBean(String beanName) {
        checkTriggers(beanName);
        return allowCreate;
    }


    public void setAllowCreate(boolean allowCreate) {
        this.allowCreate = allowCreate;
    }

    @Override
    public boolean isReadOnly(String beanName) {
        checkTriggers(beanName);
        return READ_ONLY_NAME.equals(beanName);
    }

    private void checkTriggers(String beanName) {
        if (EXCEPTION_TRIGGER_NAME.equals(beanName)) {
            throw new RuntimeException();
        }
        if (THROWABLE_TRIGGER_NAME.equals(beanName)) {
            throw new Error();
        }
    }
}