263 lines
8.3 KiB
Java
263 lines
8.3 KiB
Java
/*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.content;
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import android.net.Uri;
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import android.util.Xml;
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import org.xml.sax.Attributes;
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import org.xml.sax.Locator;
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import org.xml.sax.SAXException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Stack;
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/**
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* Inserts default data from InputStream, should be in XML format.
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* If the provider syncs data to the server, the imported data will be synced to the server.
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* <p>Samples:</p>
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* <br/>
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* Insert one row:
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* <pre>
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* <row uri="content://contacts/people">
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* <Col column = "name" value = "foo feebe "/>
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* <Col column = "addr" value = "Tx"/>
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* </row></pre>
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* <br/>
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* Delete, it must be in order of uri, select, and arg:
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* <pre>
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* <del uri="content://contacts/people" select="name=? and addr=?"
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* arg1 = "foo feebe" arg2 ="Tx"/></pre>
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* <br/>
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* Use first row's uri to insert into another table,
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* content://contacts/people/1/phones:
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* <pre>
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* <row uri="content://contacts/people">
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* <col column = "name" value = "foo feebe"/>
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* <col column = "addr" value = "Tx"/>
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* <row postfix="phones">
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* <col column="number" value="512-514-6535"/>
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* </row>
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* <row postfix="phones">
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* <col column="cell" value="512-514-6535"/>
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* </row>
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* </row></pre>
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* <br/>
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* Insert multiple rows in to same table and same attributes:
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* <pre>
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* <row uri="content://contacts/people" >
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* <row>
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* <col column= "name" value = "foo feebe"/>
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* <col column= "addr" value = "Tx"/>
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* </row>
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* <row>
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* </row>
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* </row></pre>
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*
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* @hide
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*/
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public class DefaultDataHandler implements ContentInsertHandler {
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private final static String ROW = "row";
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private final static String COL = "col";
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private final static String URI_STR = "uri";
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private final static String POSTFIX = "postfix";
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private final static String DEL = "del";
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private final static String SELECT = "select";
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private final static String ARG = "arg";
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private Stack<Uri> mUris = new Stack<Uri>();
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private ContentValues mValues;
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private ContentResolver mContentResolver;
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public void insert(ContentResolver contentResolver, InputStream in)
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throws IOException, SAXException {
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mContentResolver = contentResolver;
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Xml.parse(in, Xml.Encoding.UTF_8, this);
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}
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public void insert(ContentResolver contentResolver, String in)
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throws SAXException {
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mContentResolver = contentResolver;
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Xml.parse(in, this);
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}
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private void parseRow(Attributes atts) throws SAXException {
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String uriStr = atts.getValue(URI_STR);
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Uri uri;
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if (uriStr != null) {
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// case 1
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uri = Uri.parse(uriStr);
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if (uri == null) {
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throw new SAXException("attribute " +
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atts.getValue(URI_STR) + " parsing failure");
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}
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} else if (mUris.size() > 0){
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// case 2
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String postfix = atts.getValue(POSTFIX);
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if (postfix != null) {
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uri = Uri.withAppendedPath(mUris.lastElement(),
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postfix);
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} else {
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uri = mUris.lastElement();
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}
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} else {
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throw new SAXException("attribute parsing failure");
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}
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mUris.push(uri);
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}
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private Uri insertRow() {
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Uri u = mContentResolver.insert(mUris.lastElement(), mValues);
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mValues = null;
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return u;
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}
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public void startElement(String uri, String localName, String name,
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Attributes atts) throws SAXException {
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if (ROW.equals(localName)) {
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if (mValues != null) {
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// case 2, <Col> before <Row> insert last uri
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if (mUris.empty()) {
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throw new SAXException("uri is empty");
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}
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Uri nextUri = insertRow();
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if (nextUri == null) {
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throw new SAXException("insert to uri " +
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mUris.lastElement().toString() + " failure");
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} else {
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// make sure the stack lastElement save uri for more than one row
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mUris.pop();
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mUris.push(nextUri);
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parseRow(atts);
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}
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} else {
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int attrLen = atts.getLength();
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if (attrLen == 0) {
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// case 3, share same uri as last level
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mUris.push(mUris.lastElement());
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} else {
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parseRow(atts);
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}
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}
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} else if (COL.equals(localName)) {
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int attrLen = atts.getLength();
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if (attrLen != 2) {
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throw new SAXException("illegal attributes number " + attrLen);
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}
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String key = atts.getValue(0);
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String value = atts.getValue(1);
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if (key != null && key.length() > 0 && value != null && value.length() > 0) {
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if (mValues == null) {
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mValues = new ContentValues();
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}
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mValues.put(key, value);
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} else {
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throw new SAXException("illegal attributes value");
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}
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} else if (DEL.equals(localName)){
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Uri u = Uri.parse(atts.getValue(URI_STR));
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if (u == null) {
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throw new SAXException("attribute " +
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atts.getValue(URI_STR) + " parsing failure");
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}
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int attrLen = atts.getLength() - 2;
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if (attrLen > 0) {
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String[] selectionArgs = new String[attrLen];
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for (int i = 0; i < attrLen; i++) {
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selectionArgs[i] = atts.getValue(i+2);
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}
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mContentResolver.delete(u, atts.getValue(1), selectionArgs);
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} else if (attrLen == 0){
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mContentResolver.delete(u, atts.getValue(1), null);
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} else {
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mContentResolver.delete(u, null, null);
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}
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} else {
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throw new SAXException("unknown element: " + localName);
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}
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}
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public void endElement(String uri, String localName, String name)
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throws SAXException {
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if (ROW.equals(localName)) {
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if (mUris.empty()) {
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throw new SAXException("uri mismatch");
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}
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if (mValues != null) {
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insertRow();
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}
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mUris.pop();
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}
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}
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public void characters(char[] ch, int start, int length)
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throws SAXException {
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// TODO Auto-generated method stub
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}
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public void endDocument() throws SAXException {
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// TODO Auto-generated method stub
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}
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public void endPrefixMapping(String prefix) throws SAXException {
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// TODO Auto-generated method stub
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}
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public void ignorableWhitespace(char[] ch, int start, int length)
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throws SAXException {
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// TODO Auto-generated method stub
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}
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public void processingInstruction(String target, String data)
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throws SAXException {
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// TODO Auto-generated method stub
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}
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public void setDocumentLocator(Locator locator) {
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// TODO Auto-generated method stub
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}
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public void skippedEntity(String name) throws SAXException {
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// TODO Auto-generated method stub
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}
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public void startDocument() throws SAXException {
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// TODO Auto-generated method stub
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}
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public void startPrefixMapping(String prefix, String uri)
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throws SAXException {
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// TODO Auto-generated method stub
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}
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}
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