com.google.gwt.requestfactory.shared.DefaultProxyStore.java Source code

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Here is the source code for com.google.gwt.requestfactory.shared.DefaultProxyStore.java

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/*
 * Copyright 2010 Google Inc.
 *
 * Licensed 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 com.google.gwt.requestfactory.shared;

import com.google.gwt.autobean.shared.AutoBean;
import com.google.gwt.autobean.shared.AutoBeanCodex;
import com.google.gwt.autobean.shared.Splittable;
import com.google.gwt.requestfactory.shared.impl.MessageFactoryHolder;
import com.google.gwt.requestfactory.shared.messages.OperationMessage;

import java.util.HashMap;
import java.util.Map;

/**
 * An in-memory ProxyStore store that can encode its state as a JSON object
 * literal.
 *
 * <p><span style='color:red'>RequestFactory has moved to
 * <code>com.google.web.bindery.requestfactory</code>.  This package will be
 * removed in a future version of GWT.</span></p>
 */
@Deprecated
public class DefaultProxyStore implements ProxyStore {
    /**
     * Provide a little bit of future-proofing to at least detect an encoded
     * payload that can't be decoded.
     */
    private static final String EXPECTED_VERSION = "211";
    private final AutoBean<OperationMessage> messageBean;
    private final Map<String, Splittable> map;

    /**
     * Construct an empty DefaultProxyStore.
     */
    public DefaultProxyStore() {
        messageBean = MessageFactoryHolder.FACTORY.operation();
        map = new HashMap<String, Splittable>();

        OperationMessage message = messageBean.as();
        message.setPropertyMap(map);
        message.setVersion(EXPECTED_VERSION);
    }

    /**
     * Construct a DefaultProxyStore using the a value returned from
     * {@link #encode()}.
     *
     * @param payload a String previously returned from {@link #encode()}
     * @throws IllegalArgumentException if the payload cannot be parsed
     */
    public DefaultProxyStore(String payload) throws IllegalArgumentException {
        messageBean = AutoBeanCodex.decode(MessageFactoryHolder.FACTORY, OperationMessage.class, payload);

        OperationMessage message = messageBean.as();
        if (!EXPECTED_VERSION.equals(message.getVersion())) {
            throw new IllegalArgumentException("Unexpected version string in payload " + message.getVersion());
        }
        map = message.getPropertyMap();
    }

    /**
     * Return a JSON object literal with the contents of the store.
     */
    public String encode() {
        return AutoBeanCodex.encode(messageBean).getPayload();
    }

    public Splittable get(String key) {
        return map.get(key);
    }

    public int nextId() {
        return map.size();
    }

    public void put(String key, Splittable value) {
        map.put(key, value);
    }
}