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/*
* JBoss, Home of Professional Open Source.
* Copyright 2015 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* 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 org.wildfly.client.config;
import static java.lang.Math.min;
import static org.wildfly.client.config._private.ConfigMessages.msg;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.NoSuchElementException;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLInputFactory;
class TextXMLStreamReader implements ConfigurationXMLStreamReader {
private final String charsetName;
private final CountingReader reader;
private final ConfigurationXMLStreamReader parent;
private final URI uri;
private final XMLLocation includedFrom;
private char[] current = new char[512];
private int len;
private char[] next = new char[512];
private int nextLen;
TextXMLStreamReader(final String charsetName, final InputStream inputStream, final ConfigurationXMLStreamReader parent, final URI uri) throws UnsupportedEncodingException {
this(charsetName, new InputStreamReader(inputStream, charsetName), parent, uri);
}
TextXMLStreamReader(final Charset charset, final InputStream inputStream, final ConfigurationXMLStreamReader parent, final URI uri) {
this(charset.name(), new InputStreamReader(inputStream, charset), parent, uri);
}
TextXMLStreamReader(final String charsetName, final Reader reader, final ConfigurationXMLStreamReader parent, final URI uri) {
this(charsetName, reader instanceof CountingReader ? (CountingReader) reader : new CountingReader(reader), parent, uri);
}
TextXMLStreamReader(final String charsetName, final CountingReader reader, final ConfigurationXMLStreamReader parent, final URI uri) {
this.charsetName = charsetName;
this.reader = reader;
this.parent = parent;
this.uri = uri;
includedFrom = this.parent.getLocation();
}
public XMLLocation getIncludedFrom() {
return includedFrom;
}
public int next() throws ConfigXMLParseException {
if (! hasNext()) {
throw new NoSuchElementException();
}
// swap buffers
char[] old = current;
current = next;
len = nextLen;
next = old;
nextLen = 0;
return CHARACTERS;
}
public URI getUri() {
return uri;
}
public XMLInputFactory getXmlInputFactory() {
throw new UnsupportedOperationException();
}
public boolean hasNext() throws ConfigXMLParseException {
if (nextLen == 0) {
int res;
try {
res = reader.read(next);
} catch (IOException e) {
throw msg.failedToReadInput(getLocation(), e);
}
if (res == -1) {
return false;
}
nextLen = res;
}
return true;
}
public void close() throws ConfigXMLParseException {
try {
reader.close();
} catch (IOException e) {
throw msg.failedToCloseInput(getLocation(), e);
}
}
public String getNamespaceURI(final String prefix) {
return null;
}
public String getAttributeValue(final String namespaceURI, final String localName) {
throw new IllegalStateException();
}
public int getAttributeCount() {
throw new IllegalStateException();
}
public QName getAttributeName(final int index) {
throw new IllegalStateException();
}
public String getAttributeNamespace(final int index) {
throw new IllegalStateException();
}
public String getAttributeLocalName(final int index) {
throw new IllegalStateException();
}
public String getAttributePrefix(final int index) {
throw new IllegalStateException();
}
public String getAttributeType(final int index) {
throw new IllegalStateException();
}
public String getAttributeValue(final int index) {
throw new IllegalStateException();
}
public boolean isAttributeSpecified(final int index) {
throw new IllegalStateException();
}
public int getNamespaceCount() {
throw new IllegalStateException();
}
public String getNamespacePrefix(final int index) {
throw new IllegalStateException();
}
public String getNamespaceURI(final int index) {
throw new IllegalStateException();
}
public NamespaceContext getNamespaceContext() {
throw new IllegalStateException();
}
public int getEventType() {
return len == 0 ? START_DOCUMENT : CHARACTERS;
}
public String getText() {
if (len == 0) throw new IllegalStateException();
return new String(current, 0, len);
}
public char[] getTextCharacters() {
return Arrays.copyOf(current, len);
}
public int getTextCharacters(final int sourceStart, final char[] target, final int targetStart, final int length) {
if (sourceStart > len || targetStart > length) return 0;
int realLen = min(len - sourceStart, length);
System.arraycopy(current, sourceStart, target, targetStart, realLen);
return realLen;
}
public int getTextStart() {
return 0;
}
public int getTextLength() {
if (len == 0) throw new IllegalStateException();
return len;
}
public String getEncoding() {
return charsetName;
}
public XMLLocation getLocation() {
return new XMLLocation(includedFrom, uri, reader.getLineNumber(), reader.getColumnNumber(), reader.getCharacterOffset());
}
public QName getName() {
throw new IllegalStateException();
}
public String getLocalName() {
throw new IllegalStateException();
}
public String getNamespaceURI() {
throw new IllegalStateException();
}
public String getPrefix() {
throw new IllegalStateException();
}
public String getVersion() {
return null;
}
public String getCharacterEncodingScheme() {
return null;
}
public String getPITarget() {
return null;
}
public String getPIData() {
return null;
}
}
