org.lightcouch.URIBuilder.java Source code

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Here is the source code for org.lightcouch.URIBuilder.java

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/*
 * Copyright (C) 2011 lightcouch.org
 *
 * 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 org.lightcouch;

import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

/**
 * Helper class for construction of HTTP request URIs.
 * @since 0.0.2
 * @author Ahmed Yehia
 * 
 */
class URIBuilder {
    private String scheme;
    private String host;
    private int port;
    private String path = "";
    /* The final query */
    private final StringBuilder query = new StringBuilder();
    /* key=value params */
    private final List<NameValuePair> qParams = new ArrayList<NameValuePair>();
    private boolean uriEncoded = false;

    public static URIBuilder buildUri() {
        return new URIBuilder();
    }

    public static URIBuilder buildUri(URI uri) {
        URIBuilder builder = URIBuilder.buildUri().scheme(uri.getScheme()).host(uri.getHost()).port(uri.getPort())
                .path(uri.getPath());
        return builder;
    }

    public URI build() {
        if (uriEncoded) {
            prepareQuery();
            return createUriEncoded();
        } else
            return createUri();
    }

    public URIBuilder scheme(String scheme) {
        this.scheme = scheme;
        return this;
    }

    public URIBuilder host(String host) {
        this.host = host;
        return this;
    }

    public URIBuilder port(int port) {
        this.port = port;
        return this;
    }

    public URIBuilder path(String path) {
        this.path += path;
        return this;
    }

    public URIBuilder path(String path, boolean encode) {
        if (encode) {
            this.uriEncoded = true;
            try {
                this.path += URLEncoder.encode(path, "UTF-8");
            } catch (UnsupportedEncodingException e) {
                throw new IllegalArgumentException(e);
            }
        } else {
            path(path);
        }
        return this;
    }

    public URIBuilder query(String name, Object value) {
        if (name != null && value != null) {
            this.qParams.add(new BasicNameValuePair(name, String.valueOf(value)));
        }
        return this;
    }

    public URIBuilder query(String query) {
        if (query != null)
            this.query.append(query);
        return this;
    }

    public URIBuilder query(Params params) {
        if (params.getParams() != null)
            this.qParams.addAll(params.getParams());
        return this;
    }

    // private

    private URI createUri() {
        try {
            org.apache.http.client.utils.URIBuilder uriBuilder = new org.apache.http.client.utils.URIBuilder();
            uriBuilder.setScheme(scheme);
            uriBuilder.setHost(host);
            uriBuilder.setPort(port);
            uriBuilder.setPath(path);
            if (query.length() > 0) {
                uriBuilder.setCustomQuery(query.toString());
            } else if (!qParams.isEmpty()) {
                uriBuilder.setParameters(qParams);
            }
            return uriBuilder.build();
        } catch (URISyntaxException e) {
            throw new IllegalArgumentException(e);
        }
    }

    private URI createUriEncoded() {
        try {
            String q = (query.length() == 0) ? "" : "?" + query;
            String uri = String.format("%s://%s:%s%s%s", new Object[] { scheme, host, port, path, q });
            return new URI(uri);
        } catch (URISyntaxException e) {
            throw new IllegalArgumentException(e);
        }
    }

    private void prepareQuery() {
        for (int i = 0; i < qParams.size(); i++) {
            String amp = (i != qParams.size() - 1) ? "&" : "";
            query.append(qParams.get(i) + amp);
        }
    }

}