org.apache.james.jmap.utils.DownloadPath Maven / Gradle / Ivy

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package org.apache.james.jmap.utils;

import java.util.List;
import java.util.Optional;

import com.google.common.base.Preconditions;
import com.google.common.base.Splitter;
import com.google.common.base.Strings;
import com.google.common.collect.Iterables;

public class DownloadPath {

    public static DownloadPath from(String path) {
        Preconditions.checkArgument(!Strings.isNullOrEmpty(path), "'path' is mandatory");

        // path =  /blobId/name
        // idx  = 0 1      2
        List pathVariables = Splitter.on('/').splitToList(path);
        Preconditions.checkArgument(pathVariables.size() >= 1 && pathVariables.size() <= 3, "'blobId' is mandatory");

        String blobId = Iterables.get(pathVariables, 1, null);
        Preconditions.checkArgument(!Strings.isNullOrEmpty(blobId), "'blobId' is mandatory");

        return new DownloadPath(blobId, name(pathVariables));
    }

    private static Optional name(List pathVariables) {
        return Optional.ofNullable(Strings.emptyToNull(Iterables.get(pathVariables, 2, null)));
    }

    private final String blobId;
    private final Optional name;

    private DownloadPath(String blobId, Optional name) {
        this.blobId = blobId;
        this.name = name;
    }

    public String getBlobId() {
        return blobId;
    }

    public Optional getName() {
        return name;
    }
}