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Implement DataHolder compatible with old public API

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Marvin W 2016-07-31 12:01:48 +02:00
parent cfd7c4e70e
commit 4991c5c05b
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1 changed files with 426 additions and 29 deletions
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455
play-services-api/src/main/java/com/google/android/gms/common/data/DataHolder.java
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@ -17,39 +17,57 @@
package com.google.android.gms.common.data;
import android.annotation.SuppressLint;
import android.content.ContentValues;
import android.database.AbstractWindowedCursor;
import android.database.CharArrayBuffer;
import android.database.Cursor;
import android.database.CursorWindow;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Parcel;
import org.microg.gms.common.PublicApi;
import org.microg.safeparcel.AutoSafeParcelable;
import org.microg.safeparcel.SafeParceled;
import java.io.Closeable;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* Class for accessing collections of data, organized into columns. This provides the backing
* support for DataBuffer. Much like a cursor, the holder supports the notion of a current
* position, and has methods for extracting various types of data from named columns.
*/
public class DataHolder extends AutoSafeParcelable {
@PublicApi(until = "1")
public class DataHolder extends AutoSafeParcelable implements Closeable {
@SafeParceled(1000)
private int versionCode = 1;
@SafeParceled(1)
public final String[] columns;
private final String[] columns;
@SafeParceled(2)
public final CursorWindow[] windows;
private final CursorWindow[] windows;
@SafeParceled(3)
public final int statusCode;
private final int statusCode;
@SafeParceled(4)
public final Bundle metadata;
private final Bundle metadata;
private boolean closed = false;
private Map<String, Integer> columnIndizes;
protected static final int FIELD_TYPE_NULL = 0;
protected static final int FIELD_TYPE_INTEGER = 1;
protected static final int FIELD_TYPE_FLOAT = 2;
protected static final int FIELD_TYPE_STRING = 3;
protected static final int FIELD_TYPE_BLOB = 4;
private DataHolder() {
columns = null;
@ -58,18 +76,81 @@ public class DataHolder extends AutoSafeParcelable {
metadata = null;
}
/**
* Creates a data holder with the specified data.
*
* @param columns The column names corresponding to the data in the given windows.
* @param windows The {@link CursorWindow} instances holding the data.
* @param statusCode The status code of this {@link DataHolder}.
* @param metadata The metadata associated with this {@link DataHolder} (may be null).
*/
public DataHolder(String[] columns, CursorWindow[] windows, int statusCode, Bundle metadata) {
this.columns = columns;
this.windows = windows;
this.statusCode = statusCode;
this.metadata = metadata;
validateContents();
}
protected static final int FIELD_TYPE_BLOB = 4;
protected static final int FIELD_TYPE_FLOAT = 2;
protected static final int FIELD_TYPE_INTEGER = 1;
protected static final int FIELD_TYPE_NULL = 0;
protected static final int FIELD_TYPE_STRING = 3;
/**
* Creates a data holder wrapping the provided cursor, with provided status code and metadata.
*
* @param cursor The cursor containing the data.
* @param statusCode The status code of this {@link DataHolder}.
* @param metadata The metadata associated with this {@link DataHolder} (may be null).
*/
public DataHolder(AbstractWindowedCursor cursor, int statusCode, Bundle metadata) {
this(cursor.getColumnNames(), createCursorWindows(cursor), statusCode, metadata);
}
/**
* Creates a data holder wrapping the provided cursor, with provided status code and metadata.
*
* @param cursor The cursor containing the data.
* @param statusCode The status code of this {@link DataHolder}.
* @param metadata The metadata associated with this {@link DataHolder} (may be null).
*/
public DataHolder(Cursor cursor, int statusCode, Bundle metadata) {
this(cursor.getColumnNames(), createCursorWindows(cursor), statusCode, metadata);
}
/**
* Get a {@link DataHolder.Builder} to create a new {@link DataHolder} manually.
*
* @param columns The array of column names that the object supports.
* @param uniqueColumn The non-null column name that must contain unique values. New rows added to the builder with the same value in this column will replace any older rows.
* @return {@link DataHolder.Builder} object to work with.
*/
public static Builder builder(String[] columns, String uniqueColumn) {
return new Builder(columns, uniqueColumn);
}
/**
* Get a {@link DataHolder.Builder} to create a new {@link DataHolder} manually.
*
* @param columns The array of column names that the object supports.
* @return {@link DataHolder.Builder} object to work with.
*/
public static Builder builder(String[] columns) {
return builder(columns, null);
}
/**
* @param statusCode The status code of this {@link DataHolder}.
* @param metadata The metadata associated with this {@link DataHolder} (may be null).
* @return An empty {@link DataHolder} object with the given status and metadata.
*/
public static DataHolder empty(int statusCode, Bundle metadata) {
return new DataHolder(new String[0], new CursorWindow[0], statusCode, metadata);
}
/**
* @param statusCode The status code of this {@link DataHolder}.
* @return An empty {@link DataHolder} object with the given status and null metadata.
*/
public static DataHolder empty(int statusCode) {
return empty(statusCode, null);
}
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
@ -98,46 +179,166 @@ public class DataHolder extends AutoSafeParcelable {
throw new RuntimeException("Unsupported cursor on this platform!");
}
public static DataHolder fromCursor(Cursor cursor, int statusCode, Bundle metadata) {
/**
* Closes the data holder, releasing all of its resources and making it completely invalid.
*/
@Override
public void close() {
synchronized (this) {
if (!closed) {
closed = true;
for (CursorWindow window : windows) {
window.close();
}
}
}
}
/**
* Copies the String content in the given column at the provided position into a {@link CharArrayBuffer}.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @param dataOut The {@link CharArrayBuffer} to copy into.
*/
public void copyToBuffer(String column, int row, int windowIndex, CharArrayBuffer dataOut) {
throw new RuntimeException("Not yet available");
}
@SuppressWarnings("deprecation")
private static CursorWindow[] createCursorWindows(Builder builder) {
if (builder.columns.length == 0) return new CursorWindow[0];
List<CursorWindow> windows = new ArrayList<CursorWindow>();
CursorWindow cursorWindow = null;
int row = 0;
try {
CursorWindow current = null;
for (int rowIndex = 0; rowIndex < builder.rows.size(); rowIndex++) {
Map<String, Object> row = builder.rows.get(rowIndex);
if (current == null || !current.allocRow()) {
current = new CursorWindow(false);
current.setStartPosition(rowIndex);
current.setNumColumns(builder.columns.length);
windows.add(current);
if (!current.allocRow()) {
windows.remove(current);
return windows.toArray(new CursorWindow[windows.size()]);
}
}
for (int columnIndex = 0; columnIndex < builder.columns.length; columnIndex++) {
Object val = row.get(builder.columns[columnIndex]);
if (val == null) {
current.putNull(rowIndex, columnIndex);
} else if (val instanceof String) {
current.putString((String) val, rowIndex, columnIndex);
} else if (val instanceof Long) {
current.putLong((Long) val, rowIndex, columnIndex);
} else if (val instanceof Integer) {
current.putLong((Integer) val, rowIndex, columnIndex);
} else if (val instanceof Boolean) {
if ((Boolean) val)
current.putLong(1, rowIndex, columnIndex);
} else if (val instanceof byte[]) {
current.putBlob((byte[]) val, rowIndex, columnIndex);
} else if (val instanceof Double) {
current.putDouble((Double) val, rowIndex, columnIndex);
} else if (val instanceof Float) {
current.putDouble((Float) val, rowIndex, columnIndex);
} else {
throw new IllegalArgumentException("Unsupported object for column " + columnIndex + ": " + val);
}
}
}
} catch (RuntimeException e) {
for (CursorWindow window : windows) {
window.close();
}
throw e;
}
return windows.toArray(new CursorWindow[windows.size()]);
}
private static CursorWindow[] createCursorWindows(Cursor cursor) {
if (cursor.getColumnCount() == 0) return new CursorWindow[0];
List<CursorWindow> windows = new ArrayList<CursorWindow>();
CursorWindow current = null;
int rowIndex = 0;
while (cursor.moveToNext()) {
if (cursorWindow == null || !cursorWindow.allocRow()) {
cursorWindow = new CursorWindow(false);
cursorWindow.setNumColumns(cursor.getColumnCount());
windows.add(cursorWindow);
if (!cursorWindow.allocRow())
throw new RuntimeException("Impossible to store Cursor in CursorWindows");
row = 0;
if (current == null || !current.allocRow()) {
current = new CursorWindow(false);
current.setStartPosition(rowIndex);
current.setNumColumns(cursor.getColumnCount());
windows.add(current);
if (!current.allocRow()) {
windows.remove(current);
return windows.toArray(new CursorWindow[windows.size()]);
}
}
for (int i = 0; i < cursor.getColumnCount(); i++) {
switch (getCursorType(cursor, i)) {
case FIELD_TYPE_NULL:
cursorWindow.putNull(row, i);
current.putNull(rowIndex, i);
break;
case FIELD_TYPE_BLOB:
cursorWindow.putBlob(cursor.getBlob(i), row, i);
current.putBlob(cursor.getBlob(i), rowIndex, i);
break;
case FIELD_TYPE_FLOAT:
cursorWindow.putDouble(cursor.getDouble(i), row, i);
current.putDouble(cursor.getDouble(i), rowIndex, i);
break;
case FIELD_TYPE_INTEGER:
cursorWindow.putLong(cursor.getLong(i), row, i);
current.putLong(cursor.getLong(i), rowIndex, i);
break;
case FIELD_TYPE_STRING:
cursorWindow.putString(cursor.getString(i), row, i);
current.putString(cursor.getString(i), rowIndex, i);
break;
}
}
row++;
rowIndex++;
}
DataHolder dataHolder = new DataHolder(cursor.getColumnNames(), windows.toArray(new CursorWindow[windows.size()]), statusCode, metadata);
cursor.close();
return dataHolder;
return windows.toArray(new CursorWindow[windows.size()]);
}
@PublicApi(exclude = true)
@Deprecated
public static DataHolder fromCursor(Cursor cursor, int statusCode, Bundle metadata) {
return new DataHolder(cursor, statusCode, metadata);
}
/**
* Retrieves the boolean value for a given column at the provided position.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The boolean value in that column.
*/
public boolean getBoolean(String column, int row, int windowIndex) {
return windows[windowIndex].getLong(row, columnIndizes.get(column)) == 1;
}
/**
* Retrieves the byte array value for a given column at the provided position.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The byte array value in that column.
*/
public byte[] getByteArray(String column, int row, int windowIndex) {
return windows[windowIndex].getBlob(row, columnIndizes.get(column));
}
/**
* Gets the number of rows in the data holder.
*
* @return the number of rows in the data holder.
*/
public int getCount() {
int c = 0;
if (windows != null) {
@ -148,6 +349,88 @@ public class DataHolder extends AutoSafeParcelable {
return c;
}
/**
* Retrieves the integer value for a given column at the provided position.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The integer value in that column.
*/
public int getInteger(String column, int row, int windowIndex) {
return windows[windowIndex].getInt(row, columnIndizes.get(column));
}
/**
* Retrieves the long value for a given column at the provided position.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The long value in that column.
*/
public long getLong(String column, int row, int windowIndex) {
return windows[windowIndex].getLong(row, columnIndizes.get(column));
}
public int getStatusCode() {
return statusCode;
}
/**
* Retrieves the string value for a given column at the provided position.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The string value in that column.
*/
public String getString(String column, int row, int windowIndex) {
return windows[windowIndex].getString(row, columnIndizes.get(column));
}
/**
* Returns whether the given column at the provided position contains null.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return Whether the column value is null at this position.
*/
public boolean isNull(String column, int row, int windowIndex) {
return windows[windowIndex].isNull(row, columnIndizes.get(column));
}
public boolean isClosed() {
synchronized (this) {
return closed;
}
}
/**
* Retrieves the column data at the provided position as a URI if possible, checking for null values.
* This will throw an {@link IllegalArgumentException} if the column does not exist, the
* position is invalid, or the data holder has been closed.
*
* @param column The column to retrieve.
* @param row The row to retrieve the data from.
* @param windowIndex Index of the cursor window to extract the data from.
* @return The column data as a URI, or null if not present.
*/
public Uri parseUri(String column, int row, int windowIndex) {
String string = getString(column, row, windowIndex);
if (string != null) return Uri.parse(string);
return null;
}
@Override
public String toString() {
return "DataHolder{" +
@ -158,5 +441,119 @@ public class DataHolder extends AutoSafeParcelable {
'}';
}
public static final Creator<DataHolder> CREATOR = new AutoCreator<DataHolder>(DataHolder.class);
public void validateContents() {
columnIndizes = new HashMap<String, Integer>();
for (int i = 0; i < columns.length; i++) {
columnIndizes.put(columns[i], i);
}
}
/**
* Helper class to build {@link DataHolder} instances containing arbitrary data.
* <p/>
* Note that the constructor is private; use DataHolder.builder() to create instances of this class.
*/
public static class Builder {
private final String[] columns;
private final ArrayList<Map<String, Object>> rows;
private final String uniqueColumn;
private final Map<Object, Integer> uniqueIndizes;
private Builder(String[] columns, String uniqueColumn) {
this.columns = columns;
this.rows = new ArrayList<Map<String, Object>>();
this.uniqueColumn = uniqueColumn;
this.uniqueIndizes = new HashMap<Object, Integer>();
}
/**
* Instantiate an {@link DataHolder} from this {@link DataHolder.Builder} with the given status code and metadata.
*
* @param statusCode The status code of this {@link DataHolder}.
* @param metadata The metadata associated with this {@link DataHolder} (may be null).
* @return {@link DataHolder} representation of this object.
*/
public DataHolder build(int statusCode, Bundle metadata) {
return new DataHolder(columns, createCursorWindows(this), statusCode, metadata);
}
/**
* Instantiate an {@link DataHolder} from this {@link DataHolder.Builder} with the given status code and null metadata.
*
* @param statusCode The status code of this {@link DataHolder}.
* @return {@link DataHolder} representation of this object.
*/
public DataHolder build(int statusCode) {
return build(statusCode, null);
}
/**
* @return The number of rows that the resulting DataHolder will contain.
*/
public int getCount() {
return rows.size();
}
/**
* Sort the rows in this builder based on the standard data type comparisons for the value in the provided column.
* Calling this multiple times with the same column will not change the sort order of the builder.
* Note that any data which is added after this call will not be sorted.
*
* @param sortColumn The column to sort the rows in this builder by.
* @return {@link DataHolder.Builder} to continue construction.
*/
public Builder sort(String sortColumn) {
throw new RuntimeException("Not yet implemented");
}
/**
* Add a new row of data to the {@link DataHolder} this {@link DataHolder.Builder} will create. Note that the data must contain an entry for all columns
* <p/>
* Currently the only supported value types that are supported are String, Long, and Boolean (Integer is also accepted and will be stored as a Long).
*
* @param values {@link ContentValues} containing row data.
* @return {@link DataHolder.Builder} to continue construction.
*/
public Builder withRow(ContentValues values) {
HashMap<String, Object> row = new HashMap<String, Object>();
for (Map.Entry<String, Object> entry : values.valueSet()) {
row.put(entry.getKey(), entry.getValue());
}
return withRow(row);
}
/**
* Add a new row of data to the {@link DataHolder} this {@link DataHolder.Builder} will create. Note that the data must contain an entry for all columns
* <p/>
* Currently the only supported value types that are supported are String, Long, and Boolean (Integer is also accepted and will be stored as a Long).
*
* @param row Map containing row data.
* @return {@link DataHolder.Builder} to continue construction.
*/
public Builder withRow(HashMap<String, Object> row) {
if (uniqueColumn != null) {
Object val = row.get(uniqueColumn);
if (val != null) {
Integer old = uniqueIndizes.get(val);
if (old != null) {
rows.set(old, row);
return this;
} else {
uniqueIndizes.put(val, rows.size());
}
}
}
rows.add(row);
return this;
}
}
public static final Creator<DataHolder> CREATOR = new AutoCreator<DataHolder>(DataHolder.class) {
@Override
public DataHolder createFromParcel(Parcel parcel) {
DataHolder res = super.createFromParcel(parcel);
res.validateContents();
return res;
}
};
}