com.ctc.wstx.sr.Attribute Maven / Gradle / Ivy
Show all versions of webservices-rt Show documentation
/* Woodstox XML processor
*
* Copyright (c) 2004- Tatu Saloranta, [email protected]
*
* Licensed under the License specified in file LICENSE, included with
* the source code.
* You may not use this file except in compliance with the License.
*
* 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.ctc.wstx.sr;
import javax.xml.namespace.QName;
import com.ctc.wstx.compat.QNameCreator;
/**
* Container for information collected regarding a single element
* attribute instance. Used for both regular explicit attributes
* and values added via attribute value defaulting.
*
* This class is not exposed outside of the package and is considered
* part of internal implementation.
*
* @since 4.1
*/
final class Attribute
{
// // // Name information
protected String mLocalName;
protected String mPrefix;
protected String mNamespaceURI;
// // // Value information
/**
* Numeric offset within text builder that denotes pointer
* to the first character of the value for this attribute
* (or namespace). End offset is derived by looking at
* start pointer of the following attribute; or total
* length for the last entry
*/
protected int mValueStartOffset;
/**
* Value as a String iff it has been requested once; stored
* here in case it will be accessed again.
*/
protected String mReusableValue;
/*
//////////////////////////////////////////////////
// Life-cycle
//////////////////////////////////////////////////
*/
public Attribute(String prefix, String localName, int valueStart)
{
mLocalName = localName;
mPrefix = prefix;
mValueStartOffset = valueStart;
}
public void reset(String prefix, String localName, int valueStart)
{
mLocalName = localName;
mPrefix = prefix;
mValueStartOffset = valueStart;
mNamespaceURI = null;
mReusableValue = null;
}
/**
* Method called to inject specific value for this attribute.
*/
public void setValue(String value) {
mReusableValue = value;
}
/*
//////////////////////////////////////////////////
// Accessors
//////////////////////////////////////////////////
*/
/**
* @param uri Namespace URI of the attribute, if any; MUST be
* given as null if no namespace
* @param localName Local name to match. Note: is NOT guaranteed
* to have been interned
*
* @return True if qualified name of this attribute is the same
* as what arguments describe
*/
protected boolean hasQName(String uri, String localName)
{
if (localName != mLocalName && !localName.equals(mLocalName)) {
return false;
}
if (mNamespaceURI == uri) {
return true;
}
if (uri == null) {
return (mNamespaceURI == null) || mNamespaceURI.length() == 0;
}
return (mNamespaceURI != null && uri.equals(mNamespaceURI));
}
public QName getQName()
{
if (mPrefix == null) {
if (mNamespaceURI == null) {
return new QName(mLocalName);
}
return new QName(mNamespaceURI, mLocalName);
}
String uri = mNamespaceURI;
if (uri == null) { // Some QName impls (older JDKs) don't like nulls
uri = "";
}
// For [WSTX-174] need to use indirection:
return QNameCreator.create(uri, mLocalName, mPrefix);
}
/**
* Method called if this attribute is the last one with value
* in the buffer. If so, end value is implied
*/
public String getValue(String allValues)
{
if (mReusableValue == null) {
mReusableValue = (mValueStartOffset == 0) ?
allValues : allValues.substring(mValueStartOffset);
}
return mReusableValue;
}
public String getValue(String allValues, int endOffset)
{
if (mReusableValue == null) {
mReusableValue = allValues.substring(mValueStartOffset, endOffset);
}
return mReusableValue;
}
}