diff options
Diffstat (limited to 'tags/java/sca/2.0-M3-RC3a/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/BaseStAXArtifactProcessor.java')
| -rw-r--r-- | tags/java/sca/2.0-M3-RC3a/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/BaseStAXArtifactProcessor.java | 619 |
1 files changed, 0 insertions, 619 deletions
diff --git a/tags/java/sca/2.0-M3-RC3a/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/BaseStAXArtifactProcessor.java b/tags/java/sca/2.0-M3-RC3a/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/BaseStAXArtifactProcessor.java deleted file mode 100644 index e9da0b5780..0000000000 --- a/tags/java/sca/2.0-M3-RC3a/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/processor/BaseStAXArtifactProcessor.java +++ /dev/null @@ -1,619 +0,0 @@ -/* - * 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.contribution.processor; - -import static javax.xml.stream.XMLStreamConstants.END_ELEMENT; -import static javax.xml.stream.XMLStreamConstants.START_ELEMENT; - -import java.util.ArrayList; -import java.util.Collections; -import java.util.List; -import java.util.StringTokenizer; - -import javax.xml.XMLConstants; -import javax.xml.namespace.NamespaceContext; -import javax.xml.namespace.QName; -import javax.xml.stream.XMLStreamConstants; -import javax.xml.stream.XMLStreamException; -import javax.xml.stream.XMLStreamReader; -import javax.xml.stream.XMLStreamWriter; - -import org.apache.tuscany.sca.assembly.AssemblyFactory; -import org.apache.tuscany.sca.assembly.Extensible; -import org.apache.tuscany.sca.assembly.Extension; - - -/** - * A base class with utility methods for the other artifact processors in this module. - * - * @version $Rev$ $Date$ - */ -public abstract class BaseStAXArtifactProcessor { - - /** - * Returns a QName from a string. - * @param reader - * @param value - * @return - */ - protected QName getQNameValue(XMLStreamReader reader, String value) { - if (value != null) { - int index = value.indexOf(':'); - String prefix = index == -1 ? "" : value.substring(0, index); - String localName = index == -1 ? value : value.substring(index + 1); - String ns = reader.getNamespaceContext().getNamespaceURI(prefix); - if (ns == null) { - ns = ""; - } - return new QName(ns, localName, prefix); - } else { - return null; - } - } - - /** - * Returns the boolean value of an attribute. - * @param reader - * @param name - * @return - */ - protected boolean getBoolean(XMLStreamReader reader, String name) { - String value = reader.getAttributeValue(null, name); - if (value == null) { - return false; - } - return Boolean.valueOf(value); - } - - /** - * Returns the QName value of an attribute. - * @param reader - * @param name - * @return - */ - protected QName getQName(XMLStreamReader reader, String name) { - String qname = reader.getAttributeValue(null, name); - return getQNameValue(reader, qname); - } - - /** - * Returns the value of an attribute as a list of QNames. - * @param reader - * @param name - * @return - */ - protected List<QName> getQNames(XMLStreamReader reader, String name) { - String value = reader.getAttributeValue(null, name); - if (value != null) { - List<QName> qnames = new ArrayList<QName>(); - for (StringTokenizer tokens = new StringTokenizer(value); tokens.hasMoreTokens();) { - qnames.add(getQName(reader, tokens.nextToken())); - } - return qnames; - } else { - return Collections.emptyList(); - } - } - - /** - * Returns the string value of an attribute. - * @param reader - * @param name - * @return - */ - protected String getString(XMLStreamReader reader, String name) { - return reader.getAttributeValue(null, name); - } - - /** - * Test if an attribute is explicitly set - * @param reader - * @param name - * @return - */ - protected boolean isSet(XMLStreamReader reader, String name) { - return reader.getAttributeValue(null, name) != null; - } - - /** - * Returns the value of xsi:type attribute - * @param reader The XML stream reader - * @return The QName of the type, if the attribute is not present, null is - * returned. - */ - protected QName getXSIType(XMLStreamReader reader) { - String qname = reader.getAttributeValue(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI, "type"); - return getQNameValue(reader, qname); - } - - /** - * Parse the next child element. - * @param reader - * @return - * @throws XMLStreamException - */ - protected boolean nextChildElement(XMLStreamReader reader) throws XMLStreamException { - while (reader.hasNext()) { - int event = reader.next(); - if (event == END_ELEMENT) { - return false; - } - if (event == START_ELEMENT) { - return true; - } - } - return false; - } - - /** - * Advance the stream to the next END_ELEMENT event skipping any nested - * content. - * @param reader the reader to advance - * @throws XMLStreamException if there was a problem reading the stream - */ - protected void skipToEndElement(XMLStreamReader reader) throws XMLStreamException { - int depth = 0; - while (reader.hasNext()) { - int event = reader.next(); - if (event == XMLStreamConstants.START_ELEMENT) { - depth++; - } else if (event == XMLStreamConstants.END_ELEMENT) { - if (depth == 0) { - return; - } - depth--; - } - } - } - - /** - * - * @param writer - * @param uri - * @throws XMLStreamException - */ - private String writeElementPrefix(XMLStreamWriter writer, String uri) throws XMLStreamException { - if (uri == null) { - return null; - } - String prefix = writer.getPrefix(uri); - if (prefix != null) { - return null; - } 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); - return prefix; - } - - } - - /** - * Start an element. - * @param uri - * @param name - * @param attrs - * @throws XMLStreamException - */ - protected void writeStart(XMLStreamWriter writer, String uri, String name, XAttr... attrs) throws XMLStreamException { - String prefix = writeElementPrefix(writer, uri); - writer.writeStartElement(uri, name); - if (prefix != null){ - writer.writeNamespace(prefix,uri); - } - writeAttributePrefixes(writer, attrs); - writeAttributes(writer, attrs); - } - - /** - * Start an element. - * @param qname - * @param attrs - * @throws XMLStreamException - */ - protected void writeStart(XMLStreamWriter writer, QName qname, XAttr... attrs) throws XMLStreamException { - writeStart(writer, qname.getNamespaceURI(), qname.getLocalPart(), attrs); - } - - /** - * End an element. - * @param writer - * @throws XMLStreamException - */ - protected void writeEnd(XMLStreamWriter writer) throws XMLStreamException { - writer.writeEndElement(); - } - - /** - * Start a document. - * @param writer - * @throws XMLStreamException - */ - protected void writeStartDocument(XMLStreamWriter writer, String uri, String name, XAttr... attrs) throws XMLStreamException { - writer.writeStartDocument(); - writer.setDefaultNamespace(uri); - writeStart(writer, uri, name, attrs); - writer.writeDefaultNamespace(uri); - } - - /** - * Start a document. - * @param writer - * @param qname - * @param attrs - * @throws XMLStreamException - */ - protected void writeStartDocument(XMLStreamWriter writer, QName qname, XAttr... attrs) throws XMLStreamException { - writeStartDocument(writer, qname.getNamespaceURI(), qname.getLocalPart(), attrs); - } - - /** - * End a document. - * @param writer - * @throws XMLStreamException - */ - protected void writeEndDocument(XMLStreamWriter writer) throws XMLStreamException { - writer.writeEndDocument(); - } - - /** - * Write attributes to the current element. - * @param writer - * @param attrs - * @throws XMLStreamException - */ - protected void writeAttributes(XMLStreamWriter writer, XAttr... attrs) throws XMLStreamException { - for (XAttr attr : attrs) { - if (attr != null) - attr.write(writer); - } - } - - /** - * Write attribute prefixes to the current element. - * @param writer - * @param attrs - * @throws XMLStreamException - */ - protected void writeAttributePrefixes(XMLStreamWriter writer, XAttr... attrs) throws XMLStreamException { - for (XAttr attr : attrs) { - if (attr != null) - attr.writePrefix(writer); - } - } - - /** - * - * @param reader - * @param elementName - * @param extensible - * @param extensionAttributeProcessor - * @param extensionAttributeProcessor - * @param extensionFactory - * @throws ContributionReadException - * @throws XMLStreamException - */ - protected void readExtendedAttributes(XMLStreamReader reader, - Extensible extensible, - StAXAttributeProcessor extensionAttributeProcessor, - AssemblyFactory extensionFactory) throws ContributionReadException, - XMLStreamException { - QName elementName = reader.getName(); - for (int a = 0; a < reader.getAttributeCount(); a++) { - QName attributeName = reader.getAttributeName(a); - if (attributeName.getNamespaceURI() != null && attributeName.getNamespaceURI().length() > 0) { - if (!elementName.getNamespaceURI().equals(attributeName.getNamespaceURI())) { - Object attributeValue = extensionAttributeProcessor.read(attributeName, reader); - Extension attributeExtension; - if (attributeValue instanceof Extension) { - attributeExtension = (Extension)attributeValue; - } else { - attributeExtension = extensionFactory.createExtension(); - attributeExtension.setQName(attributeName); - attributeExtension.setValue(attributeValue); - attributeExtension.setAttribute(true); - } - extensible.getAttributeExtensions().add(attributeExtension); - } - } - } - } - - /** - * - * @param attributeModel - * @param writer - * @param extensibleElement - * @param extensionAttributeProcessor - * @throws ContributionWriteException - * @throws XMLStreamException - */ - protected void writeExtendedAttributes(XMLStreamWriter writer, - Extensible extensibleElement, - StAXAttributeProcessor extensionAttributeProcessor) - throws ContributionWriteException, XMLStreamException { - for (Extension extension : extensibleElement.getAttributeExtensions()) { - if (extension.isAttribute()) { - extensionAttributeProcessor.write(extension, writer); - } - } - } - - protected void readExtendedElement(XMLStreamReader reader, - Extensible extensible, - StAXArtifactProcessor extensionProcessor) throws ContributionReadException, - XMLStreamException { - Object ext = extensionProcessor.read(reader); - if (extensible != null) { - extensible.getExtensions().add(ext); - } - } - - protected void writeExtendedElements(XMLStreamWriter writer, - Extensible extensible, - StAXArtifactProcessor extensionProcessor) throws ContributionWriteException, - XMLStreamException { - for (Object ext : extensible.getExtensions()) { - extensionProcessor.write(ext, writer); - } - } - - /** - * Represents an XML attribute that needs to be written to a document. - */ - public static class XAttr { - - private static final String SCA11_NS = "http://docs.oasis-open.org/ns/opencsa/sca/200903"; - - private String uri = SCA11_NS; - private String name; - private 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(null, name, value); - } - - public XAttr(String uri, String name, List<?> values) { - this.uri = uri; - this.name = name; - this.value = values; - } - - public XAttr(String name, List<?> values) { - this(null, name, values); - } - - public XAttr(String uri, String name, Boolean value) { - this.uri = uri; - this.name = name; - this.value = value; - } - - public XAttr(String name, Boolean value) { - this(null, name, value); - } - - public XAttr(String uri, String name, Integer value) { - this.uri = uri; - this.name = name; - this.value = value; - } - - public XAttr(String name, Integer value) { - this(null, name, value); - } - - public XAttr(String uri, String name, Double value) { - this.uri = uri; - this.name = name; - this.value = value; - } - - public XAttr(String name, Double value) { - this(null, name, 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(null, name, value); - } - - /** - * Writes a string from a QName and registers a prefix for its namespace. - * @param reader - * @param value - * @return - */ - private 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 - if (prefix.length() > 0) { - return prefix + ":" + qname.getLocalPart(); - } else { - - // Empty prefix, just return the local part of the given qname - return 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 - */ - private 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); - writer.writeNamespace(prefix, uri); - } - } - } - - /** - * Write to document - * @param writer - * @throws XMLStreamException - */ - public void write(XMLStreamWriter writer) throws XMLStreamException { - String str; - if (value instanceof QName) { - - // Write a QName - str = writeQNameValue(writer, (QName)value); - - } else if (value instanceof List) { - - // Write a list of values - List<?> values = (List<?>)value; - if (values.isEmpty()) { - return; - } - StringBuffer buffer = new StringBuffer(); - for (Object v: values) { - if (v == null) { - // Skip null values - continue; - } - - if (v instanceof XAttr) { - // Write an XAttr value - ((XAttr)v).write(writer); - continue; - } - - if (buffer.length() != 0) { - buffer.append(' '); - } - if (v instanceof QName) { - // Write a QName value - buffer.append(writeQNameValue(writer, (QName)v)); - } else { - // Write value as a string - buffer.append(String.valueOf(v)); - } - } - str = buffer.toString(); - - } else { - - // Write a string - if (value == null) { - return; - } - str = String.valueOf(value); - } - if (str.length() == 0) { - return; - } - - // Write the attribute - if (uri != null && !uri.equals(SCA11_NS)) { - writer.writeAttribute(uri, name, str); - } else { - writer.writeAttribute(name,str); - } - } - - /** - * Registers a prefix for the namespace of a QName or list of QNames - * @param writer - * @throws XMLStreamException - */ - public void writePrefix(XMLStreamWriter writer) throws XMLStreamException { - if (value instanceof QName) { - - // Write prefix for a single QName value - writeQNamePrefix(writer, (QName)value); - - } else if (value instanceof List) { - - // Write prefixes for a list of values - for (Object v: (List<?>)value) { - if (v instanceof QName) { - // Write prefix for a QName value - writeQNamePrefix(writer, (QName)v); - - } else if (v instanceof XAttr) { - // Write prefix for an XAttr value - ((XAttr)v).writePrefix(writer); - } - } - } - } - } - -} |