AbstractApi.java

package org.gitlab4j.api;

import java.io.File;
import java.io.InputStream;
import java.net.URL;

import javax.ws.rs.NotAuthorizedException;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.StreamingOutput;

import org.gitlab4j.api.GitLabApi.ApiVersion;
import org.gitlab4j.api.models.Group;
import org.gitlab4j.api.models.Label;
import org.gitlab4j.api.models.Project;
import org.gitlab4j.api.models.User;
import org.gitlab4j.api.utils.UrlEncoder;

/**
 * This class is the base class for all the sub API classes. It provides implementations of
 * delete(), get(), post() and put() that are re-used by all the sub-classes.
 */
public abstract class AbstractApi implements Constants {

    protected final GitLabApi gitLabApi;

    public AbstractApi(GitLabApi gitLabApi) {
        this.gitLabApi = gitLabApi;
    }

    /**
     * Returns the project ID or path from the provided Integer, String, or Project instance.
     *
     * @param obj the object to determine the ID or path from
     * @return the project ID or path from the provided Long, String, or Project instance
     * @throws GitLabApiException if any exception occurs during execution
     */
    public Object getProjectIdOrPath(Object obj) throws GitLabApiException {

        if (obj == null) {
            throw (new RuntimeException("Cannot determine ID or path from null object"));
        } else if (obj instanceof Long) {
            return (obj);
        } else if (obj instanceof String) {
            return (urlEncode(((String) obj).trim()));
        } else if (obj instanceof Project) {

            Long id = ((Project) obj).getId();
            if (id != null && id.longValue() > 0) {
                return (id);
            }

            String path = ((Project) obj).getPathWithNamespace();
            if (path != null && path.trim().length() > 0) {
                return (urlEncode(path.trim()));
            }

            throw (new RuntimeException("Cannot determine ID or path from provided Project instance"));

        } else {
            throw (new RuntimeException("Cannot determine ID or path from provided " + obj.getClass().getSimpleName() +
                    " instance, must be Long, String, or a Project instance"));
        }
    }

    /**
     * Returns the group ID or path from the provided Integer, String, or Group instance.
     *
     * @param obj the object to determine the ID or path from