org.sentilo.common.utils.URIUtils.java Source code

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Here is the source code for org.sentilo.common.utils.URIUtils.java

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/*
 * Sentilo
 * 
 * Copyright (C) 2013 Institut Municipal dInformtica, Ajuntament de Barcelona.
 * 
 * This program is licensed and may be used, modified and redistributed under the terms of the
 * European Public License (EUPL), either version 1.1 or (at your option) any later version as soon
 * as they are approved by the European Commission.
 * 
 * Alternatively, you may redistribute and/or modify this program under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 * 
 * 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 licenses for the specific language governing permissions, limitations and more details.
 * 
 * You should have received a copy of the EUPL1.1 and the LGPLv3 licenses along with this program;
 * if not, you may find them at:
 * 
 * https://joinup.ec.europa.eu/software/page/eupl/licence-eupl http://www.gnu.org/licenses/ and
 * https://www.gnu.org/licenses/lgpl.txt
 */
package org.sentilo.common.utils;

import java.net.URI;
import java.net.URISyntaxException;

import org.apache.http.client.utils.URIBuilder;
import org.sentilo.common.rest.RequestParameters;

public abstract class URIUtils {

    private URIUtils() {
        throw new AssertionError();
    }

    public static String getURI(final String host, final String path) {
        return getURI(host, path, null);
    }

    public static String getURI(final String host, final String path, final RequestParameters parameters) {

        try {
            final URI baseURI = getBaseURI(host, path);
            final URIBuilder builder = new URIBuilder(baseURI);

            if (parameters != null && parameters.size() > 0) {
                for (final String key : parameters.keySet()) {
                    final String value = parameters.get(key);
                    builder.setParameter(key, value);
                }
            }
            return builder.build().toString();
        } catch (final URISyntaxException e) {
            throw buildIllegalArgumentException(host, path, e);
        }
    }

    private static URI getBaseURI(final String host, final String path) {
        try {
            String baseURI = null;
            if (host.endsWith(SentiloConstants.SLASH) && path.startsWith(SentiloConstants.SLASH)) {
                baseURI = host.substring(0, host.length() - 1) + path;
            } else if (!host.endsWith(SentiloConstants.SLASH) && !path.startsWith(SentiloConstants.SLASH)) {
                baseURI = host + SentiloConstants.SLASH + path;
            } else {
                baseURI = host + path;
            }

            return new URI(baseURI);
        } catch (final URISyntaxException e) {
            throw buildIllegalArgumentException(host, path, e);
        } catch (final NullPointerException npe) {
            throw buildIllegalArgumentException(host, path, npe);
        }
    }

    private static IllegalArgumentException buildIllegalArgumentException(final String host, final String path,
            final Exception cause) {
        final String templateMessage = "Params host %s and path %s are not valid";
        return new IllegalArgumentException(String.format(templateMessage, host, path), cause);
    }

}