Android Open Source - AndroidDBManageLibrary Version Meta Structure

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License

The source code is released under:

Apache License

Java Source Code

package com.example.dbmanage.data;
//from  w w w .ja v  a2  s .c  om
import android.annotation.SuppressLint;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class VersionMetaStructure {

  // List<Version> versions;
  List<Integer> intSortedVersions;
  Map<Integer, ScriptUri> mapScriptUri;
  private static final String fileSeparator = "/";
  public static final String CREATE_SQL_FILE = "create.sql";
  private String dbAssetFolder;

  @SuppressLint("UseSparseArrays")
  public VersionMetaStructure(String dbAssetFolder) {
    this.dbAssetFolder = dbAssetFolder;
    intSortedVersions = new ArrayList<Integer>();
    mapScriptUri = new HashMap<Integer, ScriptUri>();
  }

  public void addVersion(String version) throws NumberFormatException {
    intSortedVersions.add(Integer.valueOf(version));
    mapScriptUri.put(Integer.valueOf(version), new ScriptUri(version));
  }

  public List<Integer> getSortedVersions() {
    if (intSortedVersions.size() == 0)
      return null;
    Collections.sort(intSortedVersions);
    return Collections.unmodifiableList(intSortedVersions);
  }

  public String getUpgradeUri(Integer version) {
    if (mapScriptUri.get(version) == null) {
      return null;
    }
    return ((ScriptUri) mapScriptUri.get(version)).getUpgradeUri();
  }

  public String getDowngradeUri(Integer version) {
    if (mapScriptUri.get(version) == null) {
      return null;
    }
    return ((ScriptUri) mapScriptUri.get(version)).getDowngradeUri();
  }

  public String getCreateUri() {
    String version;
    if (intSortedVersions.size() == 0)
      return null;
    Collections.sort(intSortedVersions);
    version = mapScriptUri.get(intSortedVersions.get(0)).getVersion();
    return dbAssetFolder + fileSeparator + version + fileSeparator
        + CREATE_SQL_FILE;
  }

  private class ScriptUri {

    private String version;
    private StringBuffer upgradeUri = new StringBuffer();
    private StringBuffer downgradeUri = new StringBuffer();

    public static final String UPGRADE_SQL_FILE = "upgrade.sql";
    public static final String DOWNGRADE_SQL_FILE = "downgrade.sql";

    public ScriptUri(String version) {
      this.version = version;
      upgradeUri.append(dbAssetFolder).append(fileSeparator)
          .append(version).append(fileSeparator)
          .append(UPGRADE_SQL_FILE);
      downgradeUri.append(dbAssetFolder).append(fileSeparator)
          .append(version).append(fileSeparator)
          .append(DOWNGRADE_SQL_FILE);
    }

    public String getUpgradeUri() {
      return upgradeUri.toString();
    }

    public String getDowngradeUri() {
      return downgradeUri.toString();
    }

    public String getVersion() {
      return version;
    }

  }

}

Java Source Code List

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