File	Doc	Category	Size	Date	Package
NamespaceSupport.java	API Doc	Apache Xerces 3.0.1	10214	Fri Sep 14 20:33:54 BST 2007	org.apache.xerces.util

NamespaceSupport

• java.lang.Object

Fields Summary
protected String[]	fNamespace Namespace binding information. This array is composed of a series of tuples containing the namespace binding information: <prefix, uri>. The default size can be set to anything as long as it is a power of 2 greater than 1.
protected int	fNamespaceSize The top of the namespace information array.
protected int[]	fContext Context indexes. This array contains indexes into the namespace information array. The index at the current context is the start index of declared namespace bindings and runs to the size of the namespace information array.
protected int	fCurrentContext The current context.
protected String[]	fPrefixes

Constructors Summary
public NamespaceSupport() Default constructor. // // Constructors //
public NamespaceSupport(org.apache.xerces.xni.NamespaceContext context) Constructs a namespace context object and initializes it with the prefixes declared in the specified context. pushContext(); // copy declaration in the context Enumeration prefixes = context.getAllPrefixes(); while (prefixes.hasMoreElements()){ String prefix = (String)prefixes.nextElement(); String uri = context.getURI(prefix); declarePrefix(prefix, uri); }

Methods Summary
public boolean	containsPrefix(java.lang.String prefix) Checks whether a binding or unbinding for the given prefix exists in the context. param prefix The prefix to look up. return true if the given prefix exists in the context // find prefix in current context for (int i = fNamespaceSize; i > 0; i -= 2) { if (fNamespace[i - 2] == prefix) { return true; } } // prefix not found return false;
public boolean	declarePrefix(java.lang.String prefix, java.lang.String uri) see org.apache.xerces.xni.NamespaceContext#declarePrefix(String, String) // ignore "xml" and "xmlns" prefixes if (prefix == XMLSymbols.PREFIX_XML || prefix == XMLSymbols.PREFIX_XMLNS) { return false; } // see if prefix already exists in current context for (int i = fNamespaceSize; i > fContext[fCurrentContext]; i -= 2) { if (fNamespace[i - 2] == prefix) { // REVISIT: [Q] Should the new binding override the // previously declared binding or should it // it be ignored? -Ac // NOTE: The SAX2 "NamespaceSupport" helper allows // re-bindings with the new binding overwriting // the previous binding. -Ac fNamespace[i - 1] = uri; return true; } } // resize array, if needed if (fNamespaceSize == fNamespace.length) { String[] namespacearray = new String[fNamespaceSize * 2]; System.arraycopy(fNamespace, 0, namespacearray, 0, fNamespaceSize); fNamespace = namespacearray; } // bind prefix to uri in current context fNamespace[fNamespaceSize++] = prefix; fNamespace[fNamespaceSize++] = uri; return true;
public java.util.Enumeration	getAllPrefixes() see org.apache.xerces.xni.NamespaceContext#getAllPrefixes() int count = 0; if (fPrefixes.length < (fNamespace.length/2)) { // resize prefix array String[] prefixes = new String[fNamespaceSize]; fPrefixes = prefixes; } String prefix = null; boolean unique = true; for (int i = 2; i < (fNamespaceSize-2); i += 2) { prefix = fNamespace[i + 2]; for (int k=0;k<count;k++){ if (fPrefixes[k]==prefix){ unique = false; break; } } if (unique){ fPrefixes[count++] = prefix; } unique = true; } return new Prefixes(fPrefixes, count);
public java.lang.String	getDeclaredPrefixAt(int index) see org.apache.xerces.xni.NamespaceContext#getDeclaredPrefixAt(int) return fNamespace[fContext[fCurrentContext] + index * 2];
public int	getDeclaredPrefixCount() see org.apache.xerces.xni.NamespaceContext#getDeclaredPrefixCount() return (fNamespaceSize - fContext[fCurrentContext]) / 2;
public java.lang.String	getPrefix(java.lang.String uri) see org.apache.xerces.xni.NamespaceContext#getPrefix(String) // find uri in current context for (int i = fNamespaceSize; i > 0; i -= 2) { if (fNamespace[i - 1] == uri) { if (getURI(fNamespace[i - 2]) == uri) return fNamespace[i - 2]; } } // uri not found return null;
public java.lang.String	getURI(java.lang.String prefix) see org.apache.xerces.xni.NamespaceContext#getURI(String) // find prefix in current context for (int i = fNamespaceSize; i > 0; i -= 2) { if (fNamespace[i - 2] == prefix) { return fNamespace[i - 1]; } } // prefix not found return null;
public void	popContext() see org.apache.xerces.xni.NamespaceContext#popContext() fNamespaceSize = fContext[fCurrentContext--];
public void	pushContext() see org.apache.xerces.xni.NamespaceContext#pushContext() // extend the array, if necessary if (fCurrentContext + 1 == fContext.length) { int[] contextarray = new int[fContext.length * 2]; System.arraycopy(fContext, 0, contextarray, 0, fContext.length); fContext = contextarray; } // push context fContext[++fCurrentContext] = fNamespaceSize;
public void	reset() see org.apache.xerces.xni.NamespaceContext#reset() // reset namespace and context info fNamespaceSize = 0; fCurrentContext = 0; fContext[fCurrentContext] = fNamespaceSize; // bind "xml" prefix to the XML uri fNamespace[fNamespaceSize++] = XMLSymbols.PREFIX_XML; fNamespace[fNamespaceSize++] = NamespaceContext.XML_URI; // bind "xmlns" prefix to the XMLNS uri fNamespace[fNamespaceSize++] = XMLSymbols.PREFIX_XMLNS; fNamespace[fNamespaceSize++] = NamespaceContext.XMLNS_URI; ++fCurrentContext;