--- /dev/null
+/*
+ * Copyright 2005-2011 the original author or authors.
+ *
+ * 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.wamblee.xml;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.NamespaceContext;
+
+/**
+ * Implementation of {@link NamespaceContext} for binding namespace prefixes to
+ * namespaces. This class implements the full contract as defined by that interface.
+ *
+ * It provides a fluent interface style. In its simplest use, it can be constructed
+ * empty or with a single prefix using a constructor. In addition, the methods
+ * {@link #addPrefix(String, String)} and {@link #defaultNamespace(String)} can be used
+ * to add prefixes and to define the default namespace respectively.
+ *
+ * @author Erik Brakkee
+ */
+public class SimpleNamespaceContext implements NamespaceContext {
+
+ private String defaultNs;
+ private Map<String, String> prefixMap;
+
+ /**
+ * Constructs an empty context without prefixes.
+ */
+ public SimpleNamespaceContext() {
+ defaultNs = null;
+ prefixMap = new HashMap<String, String>();
+ }
+
+ /**
+ * Constructs a context with a single prefix.
+ * @param aPrefix Prefix.
+ * @param aNamespace Namespace.
+ */
+ public SimpleNamespaceContext(String aPrefix, String aNamespace) {
+ this();
+ addPrefix(aPrefix, aNamespace);
+ }
+
+ /**
+ * Constructs empty context (for use with static imports).
+ * @return Namespace context.
+ */
+ public static SimpleNamespaceContext namespaceContext() {
+ return new SimpleNamespaceContext();
+ }
+
+ /**
+ * Constructs a context with a single prefix (for use with static imports).
+ * @param aPrefix Prefix
+ * @param aNamespace Namespace.
+ * @return
+ */
+ public static SimpleNamespaceContext namespaceContext(String aPrefix,
+ String aNamespace) {
+ return new SimpleNamespaceContext(aPrefix, aNamespace);
+ }
+
+ /**
+ * Sets the default namespace.
+ * @param aDefaultNs Default namespace.
+ * @return Current object for method chaining.
+ */
+ public SimpleNamespaceContext defaultNamespace(String aDefaultNs) {
+ defaultNs = aDefaultNs;
+ return this;
+ }
+
+ /**
+ * Adds a prefix.
+ * @param aPrefix Prefix to add.
+ * @param aNamespace Namespace to bind prefix to.
+ * @return Current object for method chaining.
+ */
+ public SimpleNamespaceContext addPrefix(String aPrefix, String aNamespace) {
+ if (aPrefix == null) {
+ throw new IllegalArgumentException("prefix is null");
+ }
+ if (aNamespace == null) {
+ throw new IllegalArgumentException("namespace is null");
+ }
+ prefixMap.put(aPrefix, aNamespace);
+ return this;
+ }
+
+ @Override
+ public String getNamespaceURI(String aPrefix) {
+ if (XMLConstants.DEFAULT_NS_PREFIX.equals(aPrefix)) {
+ if (defaultNs == null) {
+ return XMLConstants.NULL_NS_URI;
+ }
+ return defaultNs;
+ }
+ if (XMLConstants.XML_NS_PREFIX.equals(aPrefix)) {
+ return XMLConstants.XML_NS_URI;
+ }
+ if (XMLConstants.XMLNS_ATTRIBUTE.equals(aPrefix)) {
+ return XMLConstants.XMLNS_ATTRIBUTE_NS_URI;
+ }
+ String ns = prefixMap.get(aPrefix);
+ if (ns == null) {
+ return XMLConstants.NULL_NS_URI;
+ }
+ return ns;
+ }
+
+ @Override
+ public String getPrefix(String aNamespaceURI) {
+ List<String> prefixes = getPrefixList(aNamespaceURI);
+ if (prefixes.isEmpty()) {
+ return null;
+ }
+ return prefixes.get(0);
+ }
+
+ @Override
+ public Iterator getPrefixes(String aNamespaceURI) {
+ return Collections.unmodifiableList(getPrefixList(aNamespaceURI)).iterator();
+ }
+
+ public List<String> getPrefixList(String aNamespaceURI) {
+ List<String> result = new ArrayList<String>();
+
+ if ((aNamespaceURI == null && defaultNs == null) ||
+ (defaultNs != null && defaultNs.equals(aNamespaceURI))) {
+ result.add(XMLConstants.DEFAULT_NS_PREFIX);
+ return result; // make sure not more prefixes added.
+ }
+ if (XMLConstants.XML_NS_URI.equals(aNamespaceURI)) {
+ result.add(XMLConstants.XML_NS_PREFIX);
+ return result; // make sure no more prefixes added.
+ }
+ if (XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(aNamespaceURI)) {
+ result.add(XMLConstants.XMLNS_ATTRIBUTE);
+ return result;
+ }
+ for (Map.Entry<String,String> entry: prefixMap.entrySet()) {
+ if (entry.getValue().equals(aNamespaceURI)) {
+ result.add(entry.getKey());
+ }
+ }
+ return result;
+ }
+
+}
--- /dev/null
+/*
+ * Copyright 2005-2011 the original author or authors.
+ *
+ * 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.wamblee.xml;
+
+import static junit.framework.Assert.*;
+import static org.wamblee.xml.SimpleNamespaceContext.*;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.List;
+
+import javax.xml.XMLConstants;
+import javax.xml.namespace.NamespaceContext;
+
+import org.junit.Test;
+
+public class SimpleNamespaceContextTest {
+
+ private List<String> toList(Iterator aIterator) {
+ List<String> result = new ArrayList<String>();
+ while (aIterator.hasNext()) {
+ result.add((String) aIterator.next());
+ }
+ return result;
+ }
+
+ @Test
+ public void testDefaultContextNoNamespace() {
+ NamespaceContext context = namespaceContext();
+ assertEquals(XMLConstants.NULL_NS_URI,
+ context.getNamespaceURI(XMLConstants.DEFAULT_NS_PREFIX));
+ assertEquals(XMLConstants.NULL_NS_URI, context.getNamespaceURI("xxx"));
+ assertEquals(XMLConstants.XML_NS_URI,
+ context.getNamespaceURI(XMLConstants.XML_NS_PREFIX));
+ assertEquals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI,
+ context.getNamespaceURI(XMLConstants.XMLNS_ATTRIBUTE));
+
+ assertNull(context.getPrefix(XMLConstants.DEFAULT_NS_PREFIX));
+ assertFalse(context.getPrefixes(XMLConstants.DEFAULT_NS_PREFIX)
+ .hasNext());
+
+ assertEquals(XMLConstants.XML_NS_PREFIX,
+ context.getPrefix(XMLConstants.XML_NS_URI));
+ assertEquals(Arrays.asList(XMLConstants.XML_NS_PREFIX),
+ toList(context.getPrefixes(XMLConstants.XML_NS_URI)));
+
+ assertEquals(XMLConstants.XMLNS_ATTRIBUTE,
+ context.getPrefix(XMLConstants.XMLNS_ATTRIBUTE_NS_URI));
+ assertEquals(Arrays.asList(XMLConstants.XMLNS_ATTRIBUTE),
+ toList(context.getPrefixes(XMLConstants.XMLNS_ATTRIBUTE_NS_URI)));
+
+ assertNull(context.getPrefix("http://something.com"));
+ assertFalse(context.getPrefixes("http://something.com").hasNext());
+ }
+
+ @Test
+ public void testSinglePrefix() {
+ NamespaceContext context = namespaceContext("aaa", "http://example.com");
+ singlePrefixAssertions(context);
+ }
+
+ private void singlePrefixAssertions(NamespaceContext context) {
+ assertEquals(XMLConstants.NULL_NS_URI,
+ context.getNamespaceURI(XMLConstants.DEFAULT_NS_PREFIX));
+ assertEquals(XMLConstants.NULL_NS_URI, context.getNamespaceURI("xxx"));
+ assertEquals("http://example.com", context.getNamespaceURI("aaa"));
+ assertEquals(XMLConstants.XML_NS_URI,
+ context.getNamespaceURI(XMLConstants.XML_NS_PREFIX));
+ assertEquals(XMLConstants.XMLNS_ATTRIBUTE_NS_URI,
+ context.getNamespaceURI(XMLConstants.XMLNS_ATTRIBUTE));
+
+ assertNull(context.getPrefix(XMLConstants.DEFAULT_NS_PREFIX));
+ assertEquals(XMLConstants.XML_NS_PREFIX,
+ context.getPrefix(XMLConstants.XML_NS_URI));
+ assertEquals(XMLConstants.XMLNS_ATTRIBUTE,
+ context.getPrefix(XMLConstants.XMLNS_ATTRIBUTE_NS_URI));
+ assertNull(context.getPrefix("http://something.com"));
+ assertEquals("aaa", context.getPrefix("http://example.com"));
+ }
+
+ @Test
+ public void testMultiplePrefixes() {
+ NamespaceContext context = namespaceContext().addPrefix("aaa",
+ "http://example.com").addPrefix("bbb", "http://example.com").addPrefix("ccc", "http://example2.com").addPrefix("ddd",
+ XMLConstants.XML_NS_URI).addPrefix("eee", XMLConstants.XMLNS_ATTRIBUTE_NS_URI);
+ singlePrefixAssertions(context);
+
+ List<String> prefixes = toList(context
+ .getPrefixes("http://example.com"));
+ assertEquals(2, prefixes.size());
+ assertTrue(prefixes.contains("aaa"));
+ assertTrue(prefixes.contains("bbb"));
+
+ prefixes = toList(context
+ .getPrefixes("http://example2.com"));
+ assertEquals(1, prefixes.size());
+ assertTrue(prefixes.contains("ccc"));
+
+ // standard xml and xmlns namespaces are special. Only the standard prefixes should be returned for these.
+
+ prefixes = toList(context
+ .getPrefixes(XMLConstants.XML_NS_URI));
+ assertEquals(1, prefixes.size());
+ assertTrue(prefixes.contains(XMLConstants.XML_NS_PREFIX));
+
+ prefixes = toList(context
+ .getPrefixes(XMLConstants.XMLNS_ATTRIBUTE_NS_URI));
+ assertEquals(1, prefixes.size());
+ assertTrue(prefixes.contains(XMLConstants.XMLNS_ATTRIBUTE));
+ }
+}
git://wamblee.org / utils / commitdiff