org.apache.olingo.commons.core.serialization.ContextURLParser.java Source code

Introduction

Here is the source code for org.apache.olingo.commons.core.serialization.ContextURLParser.java

Source

/* 
 * 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.olingo.commons.core.serialization;

import java.net.URI;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.StringUtils;
import org.apache.olingo.commons.api.Constants;
import org.apache.olingo.commons.api.data.ContextURL;
import org.apache.olingo.commons.api.data.ContextURL.Suffix;

public class ContextURLParser {

    public static ContextURL parse(final URI contextURL) {
        if (contextURL == null) {
            return null;
        }

        final ContextURL.Builder builder = ContextURL.Builder.create();

        String contextURLasString = contextURL.toASCIIString();

        boolean isEntity = false;
        if (contextURLasString.endsWith("/$entity") || contextURLasString.endsWith("/@Element")) {
            isEntity = true;
            builder.suffix(Suffix.ENTITY);
            contextURLasString = contextURLasString.replace("/$entity", StringUtils.EMPTY).replace("/@Element",
                    StringUtils.EMPTY);
        } else if (contextURLasString.endsWith("/$ref")) {
            builder.suffix(Suffix.REFERENCE);
            contextURLasString = contextURLasString.replace("/$ref", StringUtils.EMPTY);
        } else if (contextURLasString.endsWith("/$delta")) {
            builder.suffix(Suffix.DELTA);
            contextURLasString = contextURLasString.replace("/$delta", StringUtils.EMPTY);
        } else if (contextURLasString.endsWith("/$deletedEntity")) {
            builder.suffix(Suffix.DELTA_DELETED_ENTITY);
            contextURLasString = contextURLasString.replace("/$deletedEntity", StringUtils.EMPTY);
        } else if (contextURLasString.endsWith("/$link")) {
            builder.suffix(Suffix.DELTA_LINK);
            contextURLasString = contextURLasString.replace("/$link", StringUtils.EMPTY);
        } else if (contextURLasString.endsWith("/$deletedLink")) {
            builder.suffix(Suffix.DELTA_DELETED_LINK);
            contextURLasString = contextURLasString.replace("/$deletedLink", StringUtils.EMPTY);
        }

        builder.serviceRoot(URI.create(StringUtils.substringBefore(contextURLasString, Constants.METADATA)));

        final String rest = StringUtils.substringAfter(contextURLasString, Constants.METADATA + "#");

        String firstToken;
        String entitySetOrSingletonOrType = null;
        if (rest.startsWith("Collection(")) {
            firstToken = rest.substring(0, rest.indexOf(')') + 1);
            entitySetOrSingletonOrType = firstToken;
        } else {
            final int openParIdx = rest.indexOf('(');
            if (openParIdx == -1) {
                firstToken = StringUtils.substringBeforeLast(rest, "/");

                entitySetOrSingletonOrType = firstToken;
            } else {
                firstToken = isEntity ? rest : StringUtils.substringBeforeLast(rest, ")") + ")";

                final List<String> parts = new ArrayList<String>();
                for (String split : firstToken.split("\\)/")) {
                    parts.add(split.replaceAll("\\(.*", ""));
                }
                entitySetOrSingletonOrType = StringUtils.join(parts, '/');
                final int commaIdx = firstToken.indexOf(',');
                if (commaIdx != -1) {
                    builder.selectList(firstToken.substring(openParIdx + 1, firstToken.length() - 1));
                }
            }
        }
        builder.entitySetOrSingletonOrType(entitySetOrSingletonOrType);

        final int slashIdx = entitySetOrSingletonOrType.lastIndexOf('/');
        if (slashIdx != -1 && entitySetOrSingletonOrType.substring(slashIdx + 1).indexOf('.') != -1) {
            final String clone = entitySetOrSingletonOrType;
            builder.entitySetOrSingletonOrType(clone.substring(0, slashIdx));
            builder.derivedEntity(clone.substring(slashIdx + 1));
        }

        if (!firstToken.equals(rest)) {
            final String[] pathElems = StringUtils.substringAfter(rest, "/").split("/");
            if (pathElems.length > 0 && pathElems[0].length() > 0) {
                if (pathElems[0].indexOf('.') == -1) {
                    builder.navOrPropertyPath(pathElems[0]);
                } else {
                    builder.derivedEntity(pathElems[0]);
                }

                if (pathElems.length > 1) {
                    builder.navOrPropertyPath(pathElems[1]);
                }
            }
        }

        return builder.build();
    }
}