com.subgraph.vega.internal.model.web.WebResponse.java Source code

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Here is the source code for com.subgraph.vega.internal.model.web.WebResponse.java

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/*******************************************************************************
 * Copyright (c) 2011 Subgraph.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Subgraph - initial API and implementation
 ******************************************************************************/
package com.subgraph.vega.internal.model.web;

import java.util.Collections;
import java.util.List;

import org.apache.http.NameValuePair;

import com.db4o.ObjectContainer;
import com.db4o.activation.ActivationPurpose;
import com.subgraph.vega.api.events.EventListenerManager;
import com.subgraph.vega.api.model.web.IWebEntity;
import com.subgraph.vega.api.model.web.IWebPath;
import com.subgraph.vega.api.model.web.IWebResponse;

public class WebResponse extends WebEntity implements IWebResponse {

    private final IWebPath parentPath;
    private final List<NameValuePair> parameters;
    private final String mimeType;

    private transient String cachedQueryString;

    WebResponse(EventListenerManager eventManager, ObjectContainer database, IWebPath parentPath,
            List<NameValuePair> parameters, String mimeType) {
        super(eventManager, database);
        this.parentPath = parentPath;
        this.mimeType = mimeType;
        this.parameters = parameters;
        setVisited(true);
    }

    @Override
    public List<NameValuePair> getRequestParameters() {
        activate(ActivationPurpose.READ);
        return Collections.unmodifiableList(parameters);
    }

    @Override
    public String getMimeType() {
        activate(ActivationPurpose.READ);
        return mimeType;
    }

    @Override
    public IWebEntity getParent() {
        activate(ActivationPurpose.READ);
        return parentPath;
    }

    @Override
    public String getQueryString() {
        activate(ActivationPurpose.READ);
        synchronized (this) {
            if (cachedQueryString == null) {
                cachedQueryString = createQueryString();
            }
            return cachedQueryString;
        }
    }

    private String createQueryString() {
        final StringBuilder sb = new StringBuilder();
        for (NameValuePair pair : parameters) {
            if (sb.length() > 0)
                sb.append("&");
            sb.append(pair.getName());
            if (pair.getValue() != null) {
                sb.append("=");
                sb.append(pair.getValue());
            }
        }
        return sb.toString();
    }

    @Override
    public IWebPath getPathEntity() {
        activate(ActivationPurpose.READ);
        return parentPath;
    }

}