/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed 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 android.content;
import android.net.Uri;
import android.util.Xml;
import org.xml.sax.Attributes;
import org.xml.sax.Locator;
import org.xml.sax.SAXException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Stack;
/**
* Inserts default data from InputStream, should be in XML format.
* If the provider syncs data to the server, the imported data will be synced to the server.
* <p>Samples:</p>
* <br/>
* Insert one row:
* <pre>
* <row uri="content://contacts/people">
* <Col column = "name" value = "foo feebe "/>
* <Col column = "addr" value = "Tx"/>
* </row></pre>
* <br/>
* Delete, it must be in order of uri, select, and arg:
* <pre>
* <del uri="content://contacts/people" select="name=? and addr=?"
* arg1 = "foo feebe" arg2 ="Tx"/></pre>
* <br/>
* Use first row's uri to insert into another table,
* content://contacts/people/1/phones:
* <pre>
* <row uri="content://contacts/people">
* <col column = "name" value = "foo feebe"/>
* <col column = "addr" value = "Tx"/>
* <row postfix="phones">
* <col column="number" value="512-514-6535"/>
* </row>
* <row postfix="phones">
* <col column="cell" value="512-514-6535"/>
* </row>
* </row></pre>
* <br/>
* Insert multiple rows in to same table and same attributes:
* <pre>
* <row uri="content://contacts/people" >
* <row>
* <col column= "name" value = "foo feebe"/>
* <col column= "addr" value = "Tx"/>
* </row>
* <row>
* </row>
* </row></pre>
*
* @hide
*/
public class DefaultDataHandler implements ContentInsertHandler {
private final static String ROW = "row";
private final static String COL = "col";
private final static String URI_STR = "uri";
private final static String POSTFIX = "postfix";
private final static String DEL = "del";
private final static String SELECT = "select";
private final static String ARG = "arg";
private Stack<Uri> mUris = new Stack<Uri>();
private ContentValues mValues;
private ContentResolver mContentResolver;
public void insert(ContentResolver contentResolver, InputStream in)
throws IOException, SAXException {
mContentResolver = contentResolver;
Xml.parse(in, Xml.Encoding.UTF_8, this);
}
public void insert(ContentResolver contentResolver, String in)
throws SAXException {
mContentResolver = contentResolver;
Xml.parse(in, this);
}
private void parseRow(Attributes atts) throws SAXException {
String uriStr = atts.getValue(URI_STR);
Uri uri;
if (uriStr != null) {
// case 1
uri = Uri.parse(uriStr);
if (uri == null) {
throw new SAXException("attribute " +
atts.getValue(URI_STR) + " parsing failure");
}
} else if (mUris.size() > 0){
// case 2
String postfix = atts.getValue(POSTFIX);
if (postfix != null) {
uri = Uri.withAppendedPath(mUris.lastElement(),
postfix);
} else {
uri = mUris.lastElement();
}
} else {
throw new SAXException("attribute parsing failure");
}
mUris.push(uri);
}
private Uri insertRow() {
Uri u = mContentResolver.insert(mUris.lastElement(), mValues);
mValues = null;
return u;
}
public void startElement(String uri, String localName, String name,
Attributes atts) throws SAXException {
if (ROW.equals(localName)) {
if (mValues != null) {
// case 2, <Col> before <Row> insert last uri
if (mUris.empty()) {
throw new SAXException("uri is empty");
}
Uri nextUri = insertRow();
if (nextUri == null) {
throw new SAXException("insert to uri " +
mUris.lastElement().toString() + " failure");
} else {
// make sure the stack lastElement save uri for more than one row
mUris.pop();
mUris.push(nextUri);
parseRow(atts);
}
} else {
int attrLen = atts.getLength();
if (attrLen == 0) {
// case 3, share same uri as last level
mUris.push(mUris.lastElement());
} else {
parseRow(atts);
}
}
} else if (COL.equals(localName)) {
int attrLen = atts.getLength();
if (attrLen != 2) {
throw new SAXException("illegal attributes number " + attrLen);
}
String key = atts.getValue(0);
String value = atts.getValue(1);
if (key != null && key.length() > 0 && value != null && value.length() > 0) {
if (mValues == null) {
mValues = new ContentValues();
}
mValues.put(key, value);
} else {
throw new SAXException("illegal attributes value");
}
} else if (DEL.equals(localName)){
Uri u = Uri.parse(atts.getValue(URI_STR));
if (u == null) {
throw new SAXException("attribute " +
atts.getValue(URI_STR) + " parsing failure");
}
int attrLen = atts.getLength() - 2;
if (attrLen > 0) {
String[] selectionArgs = new String[attrLen];
for (int i = 0; i < attrLen; i++) {
selectionArgs[i] = atts.getValue(i+2);
}
mContentResolver.delete(u, atts.getValue(1), selectionArgs);
} else if (attrLen == 0){
mContentResolver.delete(u, atts.getValue(1), null);
} else {
mContentResolver.delete(u, null, null);
}
} else {
throw new SAXException("unknown element: " + localName);
}
}
public void endElement(String uri, String localName, String name)
throws SAXException {
if (ROW.equals(localName)) {
if (mUris.empty()) {
throw new SAXException("uri mismatch");
}
if (mValues != null) {
insertRow();
}
mUris.pop();
}
}
public void characters(char[] ch, int start, int length)
throws SAXException {
// TODO Auto-generated method stub
}
public void endDocument() throws SAXException {
// TODO Auto-generated method stub
}
public void endPrefixMapping(String prefix) throws SAXException {
// TODO Auto-generated method stub
}
public void ignorableWhitespace(char[] ch, int start, int length)
throws SAXException {
// TODO Auto-generated method stub
}
public void processingInstruction(String target, String data)
throws SAXException {
// TODO Auto-generated method stub
}
public void setDocumentLocator(Locator locator) {
// TODO Auto-generated method stub
}
public void skippedEntity(String name) throws SAXException {
// TODO Auto-generated method stub
}
public void startDocument() throws SAXException {
// TODO Auto-generated method stub
}
public void startPrefixMapping(String prefix, String uri)
throws SAXException {
// TODO Auto-generated method stub
}
}
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