org.cloudfoundry.identity.app.web.MapWrapper.java Source code

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Here is the source code for org.cloudfoundry.identity.app.web.MapWrapper.java

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/*
 * Cloud Foundry 2012.02.03 Beta
 * Copyright (c) [2009-2012] VMware, Inc. All Rights Reserved.
 *
 * This product is licensed to you under the Apache License, Version 2.0 (the "License").
 * You may not use this product except in compliance with the License.
 *
 * This product includes a number of subcomponents with
 * separate copyright notices and license terms. Your use of these
 * subcomponents is subject to the terms and conditions of the
 * subcomponent's license, as noted in the LICENSE file.
 */
package org.cloudfoundry.identity.app.web;

import java.util.Map;

import org.springframework.context.expression.MapAccessor;
import org.springframework.expression.spel.standard.SpelExpressionParser;
import org.springframework.expression.spel.support.StandardEvaluationContext;

public class MapWrapper {

    private final SpelExpressionParser parser;

    private final StandardEvaluationContext context;

    private Object target;

    public MapWrapper(Object target) throws Exception {
        this.target = target;
        context = new StandardEvaluationContext();
        context.addPropertyAccessor(new MapAccessor());
        parser = new SpelExpressionParser();
    }

    @SuppressWarnings("unchecked")
    public Map<String, Object> getMap() {
        return (Map<String, Object>) target;
    }

    public Object get(String expression) throws Exception {
        return get(expression, Object.class);
    }

    public <T> T get(String expression, Class<T> type) throws Exception {
        return parser.parseExpression(expression).getValue(context, target, type);
    }

    @Override
    public String toString() {
        return target.toString();
    }

}