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Diffstat (limited to '')
-rw-r--r-- | branches/sca-java-0.99/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/branches/sca-java-0.99/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java b/branches/sca-java-0.99/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java new file mode 100644 index 0000000000..fba7fc5391 --- /dev/null +++ b/branches/sca-java-0.99/modules/assembly-xml/src/main/java/org/apache/tuscany/sca/assembly/xml/XAttr.java @@ -0,0 +1,158 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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.apache.tuscany.sca.assembly.xml; + +import javax.xml.namespace.NamespaceContext; +import javax.xml.namespace.QName; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamWriter; + + +/** + * Represents an XML attribute that needs to be written to a document. + * + * @version $Rev$ $Date$ + */ +class XAttr { + + String uri = Constants.SCA10_NS; + String name; + Object value; + + public XAttr(String uri, String name, String value) { + this.uri = uri; + this.name = name; + this.value = value; + } + + public XAttr(String name, String value) { + this.name = name; + this.value = value; + } + + public XAttr(String uri, String name, boolean value) { + this.uri = uri; + this.name = name; + this.value = value; + } + + public XAttr(String name, boolean value) { + this.name = name; + this.value = value; + } + + public XAttr(String uri, String name, QName value) { + this.uri = uri; + this.name = name; + this.value = value; + } + + public XAttr(String name, QName value) { + this.name = name; + this.value = value; + } + + /** + * Writes a string from a qname and registers a prefix for its namespace. + * @param reader + * @param value + * @return + */ + protected String writeQNameValue(XMLStreamWriter writer, QName qname) throws XMLStreamException { + if (qname != null) { + String prefix = qname.getPrefix(); + String uri = qname.getNamespaceURI(); + prefix = writer.getPrefix(uri); + if (prefix != null) { + + // Use the prefix already bound to the given uri + return prefix + ":" + qname.getLocalPart(); + } else { + + // Find an available prefix and bind it to the given uri + NamespaceContext nsc = writer.getNamespaceContext(); + for (int i=1; ; i++) { + prefix = "ns" + i; + if (nsc.getNamespaceURI(prefix) == null) { + break; + } + } + writer.setPrefix(prefix, uri); + writer.writeNamespace(prefix, uri); + return prefix + ":" + qname.getLocalPart(); + } + } else { + return null; + } + } + + /** + * Registers a prefix for the namespace of a QName. + * @param reader + * @param value + * @return + */ + protected void writeQNamePrefix(XMLStreamWriter writer, QName qname) throws XMLStreamException { + if (qname != null) { + String prefix = qname.getPrefix(); + String uri = qname.getNamespaceURI(); + prefix = writer.getPrefix(uri); + if (prefix != null) { + return; + } else { + + // Find an available prefix and bind it to the given uri + NamespaceContext nsc = writer.getNamespaceContext(); + for (int i=1; ; i++) { + prefix = "ns" + i; + if (nsc.getNamespaceURI(prefix) == null) { + break; + } + } + writer.setPrefix(prefix, uri); + } + } + } + + void write(XMLStreamWriter writer) throws XMLStreamException { + if (value != null) { + String str; + if (value instanceof QName) { + str = writeQNameValue(writer, (QName)value); + } else { + str = String.valueOf(value); + } + if (uri != null && !uri.equals(Constants.SCA10_NS)) { + writer.writeAttribute(uri, name, str); + } else { + writer.writeAttribute(name,str); + } + } + } + + void writePrefix(XMLStreamWriter writer) throws XMLStreamException { + if (value != null) { + if (value instanceof QName) { + writeQNamePrefix(writer, (QName)value); + } + } + } + +} |