Example usage for org.springframework.batch.item.xml.stax UnclosedElementCollectingEventWriter UnclosedElementCollectingEventWriter

Introduction

In this page you can find the example usage for org.springframework.batch.item.xml.stax UnclosedElementCollectingEventWriter UnclosedElementCollectingEventWriter.

Prototype

public UnclosedElementCollectingEventWriter(XMLEventWriter wrappedEventWriter) 

Source Link

Usage

From source file:org.springframework.batch.item.xml.StaxEventItemWriter.java

/**
 * Open the output source//from  ww  w  . j  av  a2s . com
 * 
 * @see org.springframework.batch.item.ItemStream#open(ExecutionContext)
 */
@SuppressWarnings("unchecked")
@Override
public void open(ExecutionContext executionContext) {
    super.open(executionContext);

    Assert.notNull(resource, "The resource must be set");

    long startAtPosition = 0;

    // if restart data is provided, restart from provided offset
    // otherwise start from beginning
    if (executionContext.containsKey(getExecutionContextKey(RESTART_DATA_NAME))) {
        startAtPosition = executionContext.getLong(getExecutionContextKey(RESTART_DATA_NAME));
        currentRecordCount = executionContext.getLong(getExecutionContextKey(WRITE_STATISTICS_NAME));
        if (executionContext.containsKey(getExecutionContextKey(UNCLOSED_HEADER_CALLBACK_ELEMENTS_NAME))) {
            unclosedHeaderCallbackElements = (List<QName>) executionContext
                    .get(getExecutionContextKey(UNCLOSED_HEADER_CALLBACK_ELEMENTS_NAME));
        }

        restarted = true;
        if (shouldDeleteIfEmpty && currentRecordCount == 0) {
            // previous execution deleted the output file because no items were written
            restarted = false;
            startAtPosition = 0;
        } else {
            restarted = true;
        }
    } else {
        currentRecordCount = 0;
        restarted = false;
    }

    open(startAtPosition);

    if (startAtPosition == 0) {
        try {
            if (headerCallback != null) {
                UnclosedElementCollectingEventWriter headerCallbackWriter = new UnclosedElementCollectingEventWriter(
                        delegateEventWriter);
                headerCallback.write(headerCallbackWriter);
                unclosedHeaderCallbackElements = headerCallbackWriter.getUnclosedElements();
            }
        } catch (IOException e) {
            throw new ItemStreamException("Failed to write headerItems", e);
        }
    }

    this.initialized = true;

}

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