com.mitchellbosecke.pebble.spring.context.Beans.java Source code

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Here is the source code for com.mitchellbosecke.pebble.spring.context.Beans.java

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/*******************************************************************************
 * Copyright (c) 2013 by Mitchell Bsecke
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 ******************************************************************************/
package com.mitchellbosecke.pebble.spring.context;

import java.util.Arrays;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Set;

import org.springframework.context.ApplicationContext;
import org.springframework.util.Assert;

/**
 * <p>
 * Special object made available to templates in Spring MVC applications in
 * order to access beans in the Application Context.
 * </p>
 *
 * @author Eric Bussieres
 */
public class Beans implements Map<String, Object> {

    private final ApplicationContext ctx;

    public Beans(ApplicationContext ctx) {
        Assert.notNull(ctx, "Application Context cannot be null");
        this.ctx = ctx;
    }

    @Override
    public void clear() {
        throw new UnsupportedOperationException("Method \"clear\" not supported in Beans object");
    }

    @Override
    public boolean containsKey(Object key) {
        Assert.notNull(key, "Key cannot be null");
        return this.ctx.containsBean(key.toString());
    }

    @Override
    public boolean containsValue(Object value) {
        throw new UnsupportedOperationException("Method \"containsValue\" not supported in Beans object");
    }

    @Override
    public Set<java.util.Map.Entry<String, Object>> entrySet() {
        throw new UnsupportedOperationException("Method \"entrySet\" not supported in Beans object");
    }

    @Override
    public Object get(Object key) {
        Assert.notNull(key, "Key cannot be null");
        return this.ctx.getBean(key.toString());
    }

    @Override
    public boolean isEmpty() {
        return this.size() <= 0;
    }

    @Override
    public Set<String> keySet() {
        return new LinkedHashSet<String>(Arrays.asList(this.ctx.getBeanDefinitionNames()));
    }

    @Override
    public Object put(String key, Object value) {
        throw new UnsupportedOperationException("Method \"put\" not supported in Beans object");
    }

    @Override
    public void putAll(Map<? extends String, ?> m) {
        throw new UnsupportedOperationException("Method \"putAll\" not supported in Beans object");
    }

    @Override
    public Object remove(Object key) {
        throw new UnsupportedOperationException("Method \"remove\" not supported in Beans object");
    }

    @Override
    public int size() {
        return this.ctx.getBeanDefinitionCount();
    }

    @Override
    public Collection<Object> values() {
        throw new UnsupportedOperationException("Method \"values\" not supported in Beans object");
    }

}