diff options
Diffstat (limited to 'branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/reader/WrappingXMLStreamReader.java')
-rw-r--r-- | branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/reader/WrappingXMLStreamReader.java | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/reader/WrappingXMLStreamReader.java b/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/reader/WrappingXMLStreamReader.java new file mode 100644 index 0000000000..896f4b5b71 --- /dev/null +++ b/branches/sca-java-2.0-M4/modules/common-xml/src/main/java/org/apache/tuscany/sca/common/xml/stax/reader/WrappingXMLStreamReader.java @@ -0,0 +1,100 @@ +/* + * 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.common.xml.stax.reader; + +import javax.xml.namespace.NamespaceContext; +import javax.xml.stream.XMLStreamException; +import javax.xml.stream.XMLStreamReader; +import javax.xml.stream.util.StreamReaderDelegate; + +public class WrappingXMLStreamReader extends StreamReaderDelegate implements XMLFragmentStreamReader { + + private boolean done; + private int level; + + public WrappingXMLStreamReader(XMLStreamReader realReader) throws XMLStreamException { + super(realReader); + if (realReader == null) { + throw new UnsupportedOperationException("Reader cannot be null"); + } + + if (realReader instanceof XMLFragmentStreamReader) { + ((XMLFragmentStreamReader)realReader).init(); + } + + if (realReader.getEventType() == START_DOCUMENT) { + // Position to the 1st element + realReader.nextTag(); + } + if (realReader.getEventType() != START_ELEMENT) { + throw new IllegalStateException("The reader is not positioned at START_DOCUMENT or START_ELEMENT"); + } + this.done = false; + this.level = 1; + } + + @Override + public boolean hasNext() throws XMLStreamException { + return !done && super.hasNext(); + } + + @Override + public int next() throws XMLStreamException { + if (!hasNext()) { + throw new IllegalStateException("No more events"); + } + int event = super.next(); + if (!super.hasNext()) { + done = true; + } + if (event == START_ELEMENT) { + level++; + } else if (event == END_ELEMENT) { + level--; + if (level == 0) { + done = true; + } + } + return event; + } + + @Override + public int nextTag() throws XMLStreamException { + int event = 0; + while (true) { + event = next(); + if (event == START_ELEMENT || event == END_ELEMENT) { + return event; + } + } + } + + public void setParentNamespaceContext(NamespaceContext nsContext) { + // nothing to do here + } + + public void init() { + // Nothing to do here + } + + public boolean isDone() { + return done; + } + +} |