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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.cxf.jaxrs.impl;

import java.net.URI;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;

import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.PathSegment;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;

import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.jaxrs.model.MethodInvocationInfo;
import org.apache.cxf.jaxrs.model.OperationResourceInfo;
import org.apache.cxf.jaxrs.model.OperationResourceInfoStack;
import org.apache.cxf.jaxrs.model.URITemplate;
import org.apache.cxf.jaxrs.utils.HttpUtils;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageUtils;

public class UriInfoImpl implements UriInfo {
    private static final Logger LOG = LogUtils.getL7dLogger(UriInfoImpl.class);
    private static final String CASE_INSENSITIVE_QUERIES = "org.apache.cxf.http.case_insensitive_queries";

    private MultivaluedMap templateParams;
    private Message message;
    private OperationResourceInfoStack stack;
    private boolean caseInsensitiveQueries;

    @SuppressWarnings("unchecked")
    public UriInfoImpl(Message m) {
        this(m, (MultivaluedMap)m.get(URITemplate.TEMPLATE_PARAMETERS));
    }
    
    public UriInfoImpl(Message m, MultivaluedMap templateParams) {
        this.message = m;
        this.templateParams = templateParams;
        if (m != null) {
            this.stack = m.get(OperationResourceInfoStack.class);
            this.caseInsensitiveQueries = 
                MessageUtils.isTrue(m.getContextualProperty(CASE_INSENSITIVE_QUERIES));
        }
    }

    public URI getAbsolutePath() {
        String path = getAbsolutePathAsString();
        return URI.create(path);
    }

    public UriBuilder getAbsolutePathBuilder() {
        return new UriBuilderImpl(getAbsolutePath());
    }

    public URI getBaseUri() {
        URI u = URI.create(HttpUtils.getEndpointAddress(message));
        return HttpUtils.toAbsoluteUri(u, message);
    }

    public UriBuilder getBaseUriBuilder() {
        return new UriBuilderImpl(getBaseUri());
    }

    public String getPath() {
        return getPath(true);
    }

    public String getPath(boolean decode) {
        String value = doGetPath(decode, true);
        if (value.length() > 1 && value.startsWith("/")) { 
            return value.substring(1);
        } else {
            return value;
        }
    }

    public List getPathSegments() {
        return getPathSegments(true);
    }

    public List getPathSegments(boolean decode) {
        return JAXRSUtils.getPathSegments(getPath(false), decode);
    }

    public MultivaluedMap getQueryParameters() {
        return getQueryParameters(true);
    }

    public MultivaluedMap getQueryParameters(boolean decode) {
        
        if (!caseInsensitiveQueries) {
            return JAXRSUtils.getStructuredParams((String)message.get(Message.QUERY_STRING), 
                              "&", decode, decode);
        }
        
        MultivaluedMap queries = new MetadataMap(false, true);
        JAXRSUtils.getStructuredParams(queries, (String)message.get(Message.QUERY_STRING), 
                                      "&", decode, decode);
        return queries;
        
    }

    public URI getRequestUri() {
        String path = getAbsolutePathAsString();
        String queries = (String)message.get(Message.QUERY_STRING);
        if (queries != null) {
            path += "?" + queries;
        }
        return URI.create(path);
    }

    public UriBuilder getRequestUriBuilder() {
        return new UriBuilderImpl(getRequestUri());
    }

    public MultivaluedMap getPathParameters() {
        return getPathParameters(true);
    }

    public MultivaluedMap getPathParameters(boolean decode) {
        MetadataMap values = new MetadataMap();
        if (templateParams == null) {
            return values;
        }
        for (Map.Entry> entry : templateParams.entrySet()) {
            if (entry.getKey().equals(URITemplate.FINAL_MATCH_GROUP)) {
                continue;
            }
            values.add(entry.getKey(), decode ? HttpUtils.pathDecode(entry.getValue().get(0)) : entry
                .getValue().get(0));
        }
        return values;
    }

    public List