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author | Dianne Hackborn <hackbod@google.com> | 2010-02-24 19:54:22 -0800 |
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committer | Dianne Hackborn <hackbod@google.com> | 2010-02-25 11:39:33 -0800 |
commit | 2269d1572e5fcfb725ea55f5764d8c3280d69f6d (patch) | |
tree | 7ce0788be6d85972d42ee7135cdce82aa323fcc7 /core/java/com/android/internal/util/FastXmlSerializer.java | |
parent | e46145f7c114b9ac6d19c6a7886e9239463f91e1 (diff) | |
download | frameworks_base-2269d1572e5fcfb725ea55f5764d8c3280d69f6d.zip frameworks_base-2269d1572e5fcfb725ea55f5764d8c3280d69f6d.tar.gz frameworks_base-2269d1572e5fcfb725ea55f5764d8c3280d69f6d.tar.bz2 |
Re-arrange android-common so framework no longer links with it.
This is the framework part, moving classes around so the framework
no longer needs to link to android-common. Makes some APIs public,
others that didn't need to be public are private in the framework,
some small things are copied.
Diffstat (limited to 'core/java/com/android/internal/util/FastXmlSerializer.java')
-rw-r--r-- | core/java/com/android/internal/util/FastXmlSerializer.java | 365 |
1 files changed, 365 insertions, 0 deletions
diff --git a/core/java/com/android/internal/util/FastXmlSerializer.java b/core/java/com/android/internal/util/FastXmlSerializer.java new file mode 100644 index 0000000..592a8fa --- /dev/null +++ b/core/java/com/android/internal/util/FastXmlSerializer.java @@ -0,0 +1,365 @@ +/* + * Copyright (C) 2006 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 com.android.internal.util; + +import org.xmlpull.v1.XmlSerializer; + +import java.io.IOException; +import java.io.OutputStream; +import java.io.OutputStreamWriter; +import java.io.UnsupportedEncodingException; +import java.io.Writer; +import java.nio.ByteBuffer; +import java.nio.CharBuffer; +import java.nio.charset.Charset; +import java.nio.charset.CharsetEncoder; +import java.nio.charset.CoderResult; +import java.nio.charset.IllegalCharsetNameException; +import java.nio.charset.UnsupportedCharsetException; + +/** + * This is a quick and dirty implementation of XmlSerializer that isn't horribly + * painfully slow like the normal one. It only does what is needed for the + * specific XML files being written with it. + */ +public class FastXmlSerializer implements XmlSerializer { + private static final String ESCAPE_TABLE[] = new String[] { + null, null, null, null, null, null, null, null, // 0-7 + null, null, null, null, null, null, null, null, // 8-15 + null, null, null, null, null, null, null, null, // 16-23 + null, null, null, null, null, null, null, null, // 24-31 + null, null, """, null, null, null, "&", null, // 32-39 + null, null, null, null, null, null, null, null, // 40-47 + null, null, null, null, null, null, null, null, // 48-55 + null, null, null, null, "<", null, ">", null, // 56-63 + }; + + private static final int BUFFER_LEN = 8192; + + private final char[] mText = new char[BUFFER_LEN]; + private int mPos; + + private Writer mWriter; + + private OutputStream mOutputStream; + private CharsetEncoder mCharset; + private ByteBuffer mBytes = ByteBuffer.allocate(BUFFER_LEN); + + private boolean mInTag; + + private void append(char c) throws IOException { + int pos = mPos; + if (pos >= (BUFFER_LEN-1)) { + flush(); + pos = mPos; + } + mText[pos] = c; + mPos = pos+1; + } + + private void append(String str, int i, final int length) throws IOException { + if (length > BUFFER_LEN) { + final int end = i + length; + while (i < end) { + int next = i + BUFFER_LEN; + append(str, i, next<end ? BUFFER_LEN : (end-i)); + i = next; + } + return; + } + int pos = mPos; + if ((pos+length) > BUFFER_LEN) { + flush(); + pos = mPos; + } + str.getChars(i, i+length, mText, pos); + mPos = pos + length; + } + + private void append(char[] buf, int i, final int length) throws IOException { + if (length > BUFFER_LEN) { + final int end = i + length; + while (i < end) { + int next = i + BUFFER_LEN; + append(buf, i, next<end ? BUFFER_LEN : (end-i)); + i = next; + } + return; + } + int pos = mPos; + if ((pos+length) > BUFFER_LEN) { + flush(); + pos = mPos; + } + System.arraycopy(buf, i, mText, pos, length); + mPos = pos + length; + } + + private void append(String str) throws IOException { + append(str, 0, str.length()); + } + + private void escapeAndAppendString(final String string) throws IOException { + final int N = string.length(); + final char NE = (char)ESCAPE_TABLE.length; + final String[] escapes = ESCAPE_TABLE; + int lastPos = 0; + int pos; + for (pos=0; pos<N; pos++) { + char c = string.charAt(pos); + if (c >= NE) continue; + String escape = escapes[c]; + if (escape == null) continue; + if (lastPos < pos) append(string, lastPos, pos-lastPos); + lastPos = pos + 1; + append(escape); + } + if (lastPos < pos) append(string, lastPos, pos-lastPos); + } + + private void escapeAndAppendString(char[] buf, int start, int len) throws IOException { + final char NE = (char)ESCAPE_TABLE.length; + final String[] escapes = ESCAPE_TABLE; + int end = start+len; + int lastPos = start; + int pos; + for (pos=start; pos<end; pos++) { + char c = buf[pos]; + if (c >= NE) continue; + String escape = escapes[c]; + if (escape == null) continue; + if (lastPos < pos) append(buf, lastPos, pos-lastPos); + lastPos = pos + 1; + append(escape); + } + if (lastPos < pos) append(buf, lastPos, pos-lastPos); + } + + public XmlSerializer attribute(String namespace, String name, String value) throws IOException, + IllegalArgumentException, IllegalStateException { + append(' '); + if (namespace != null) { + append(namespace); + append(':'); + } + append(name); + append("=\""); + + escapeAndAppendString(value); + append('"'); + return this; + } + + public void cdsect(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void comment(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void docdecl(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void endDocument() throws IOException, IllegalArgumentException, IllegalStateException { + flush(); + } + + public XmlSerializer endTag(String namespace, String name) throws IOException, + IllegalArgumentException, IllegalStateException { + if (mInTag) { + append(" />\n"); + } else { + append("</"); + if (namespace != null) { + append(namespace); + append(':'); + } + append(name); + append(">\n"); + } + mInTag = false; + return this; + } + + public void entityRef(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + private void flushBytes() throws IOException { + int position; + if ((position = mBytes.position()) > 0) { + mBytes.flip(); + mOutputStream.write(mBytes.array(), 0, position); + mBytes.clear(); + } + } + + public void flush() throws IOException { + //Log.i("PackageManager", "flush mPos=" + mPos); + if (mPos > 0) { + if (mOutputStream != null) { + CharBuffer charBuffer = CharBuffer.wrap(mText, 0, mPos); + CoderResult result = mCharset.encode(charBuffer, mBytes, true); + while (true) { + if (result.isError()) { + throw new IOException(result.toString()); + } else if (result.isOverflow()) { + flushBytes(); + result = mCharset.encode(charBuffer, mBytes, true); + continue; + } + break; + } + flushBytes(); + mOutputStream.flush(); + } else { + mWriter.write(mText, 0, mPos); + mWriter.flush(); + } + mPos = 0; + } + } + + public int getDepth() { + throw new UnsupportedOperationException(); + } + + public boolean getFeature(String name) { + throw new UnsupportedOperationException(); + } + + public String getName() { + throw new UnsupportedOperationException(); + } + + public String getNamespace() { + throw new UnsupportedOperationException(); + } + + public String getPrefix(String namespace, boolean generatePrefix) + throws IllegalArgumentException { + throw new UnsupportedOperationException(); + } + + public Object getProperty(String name) { + throw new UnsupportedOperationException(); + } + + public void ignorableWhitespace(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void processingInstruction(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void setFeature(String name, boolean state) throws IllegalArgumentException, + IllegalStateException { + if (name.equals("http://xmlpull.org/v1/doc/features.html#indent-output")) { + return; + } + throw new UnsupportedOperationException(); + } + + public void setOutput(OutputStream os, String encoding) throws IOException, + IllegalArgumentException, IllegalStateException { + if (os == null) + throw new IllegalArgumentException(); + if (true) { + try { + mCharset = Charset.forName(encoding).newEncoder(); + } catch (IllegalCharsetNameException e) { + throw (UnsupportedEncodingException) (new UnsupportedEncodingException( + encoding).initCause(e)); + } catch (UnsupportedCharsetException e) { + throw (UnsupportedEncodingException) (new UnsupportedEncodingException( + encoding).initCause(e)); + } + mOutputStream = os; + } else { + setOutput( + encoding == null + ? new OutputStreamWriter(os) + : new OutputStreamWriter(os, encoding)); + } + } + + public void setOutput(Writer writer) throws IOException, IllegalArgumentException, + IllegalStateException { + mWriter = writer; + } + + public void setPrefix(String prefix, String namespace) throws IOException, + IllegalArgumentException, IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void setProperty(String name, Object value) throws IllegalArgumentException, + IllegalStateException { + throw new UnsupportedOperationException(); + } + + public void startDocument(String encoding, Boolean standalone) throws IOException, + IllegalArgumentException, IllegalStateException { + append("<?xml version='1.0' encoding='utf-8' standalone='" + + (standalone ? "yes" : "no") + "' ?>\n"); + } + + public XmlSerializer startTag(String namespace, String name) throws IOException, + IllegalArgumentException, IllegalStateException { + if (mInTag) { + append(">\n"); + } + append('<'); + if (namespace != null) { + append(namespace); + append(':'); + } + append(name); + mInTag = true; + return this; + } + + public XmlSerializer text(char[] buf, int start, int len) throws IOException, + IllegalArgumentException, IllegalStateException { + if (mInTag) { + append(">"); + mInTag = false; + } + escapeAndAppendString(buf, start, len); + return this; + } + + public XmlSerializer text(String text) throws IOException, IllegalArgumentException, + IllegalStateException { + if (mInTag) { + append(">"); + mInTag = false; + } + escapeAndAppendString(text); + return this; + } + +} |