SymbolsProcessor.java

/*******************************************************************************
 * Copyright (c) 2008 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kent Sebastian <ksebasti@redhat.com> - initial API and implementation
 *******************************************************************************/
package org.eclipse.linuxtools.internal.oprofile.core.opxml.modeldata;

import java.util.ArrayList;

import org.eclipse.linuxtools.internal.oprofile.core.model.OpModelSymbol;
import org.eclipse.linuxtools.internal.oprofile.core.opxml.OprofileSAXHandler;
import org.eclipse.linuxtools.internal.oprofile.core.opxml.XMLProcessor;
import org.xml.sax.Attributes;

/**
 * A processor for the <symbols> tag from `opxml samples ..`
 */
public class SymbolsProcessor extends XMLProcessor {
    //XML tags parsed by this processor
    private static final String SYMBOLS_TAG = "symbols"; //$NON-NLS-1$
    private static final String SYMBOL_TAG = "symbol";  //$NON-NLS-1$
    private static final String SAMPLE_TAG = "sample"; //$NON-NLS-1$

    //attribute tags
    private static final String ATTR_NAME = "name"; //$NON-NLS-1$
    private static final String ATTR_FILE = "file"; //$NON-NLS-1$
    private static final String ATTR_COUNT = "count";     //$NON-NLS-1$
    private static final String ATTR_LINE = "line";     //$NON-NLS-1$

    /**
     * The current symbol being constructed
     */
    private OpModelSymbol symbol;
    //all the symbols in this <symbols> tag, to be returned to the calling ModelDataProcessor
    private ArrayList<OpModelSymbol> symbols;

    /**
     * The processor used for individual samples
     */
    private SamplesProcessor samplesProcessor = new SamplesProcessor();


    @Override
    public void reset(Object callData) {
        symbol = new OpModelSymbol();
        symbols = new ArrayList<>();
    }

    @Override
    public void startElement(String name, Attributes attrs, Object callData) {
        if (name.equals(SYMBOL_TAG)) {
            symbol.setName(validString(attrs.getValue(ATTR_NAME)));
            symbol.setCount(Integer.parseInt(attrs.getValue(ATTR_COUNT)));
            symbol.setFilePath(validString(attrs.getValue(ATTR_FILE)));
            symbol.setLine(Integer.parseInt(attrs.getValue(ATTR_LINE)));
        } else if (name.equals(SAMPLE_TAG)) {
            OprofileSAXHandler.getInstance(callData).push(samplesProcessor);
        }
    }

    @Override
    public void endElement(String name, Object callData) {
        if (name.equals(SYMBOL_TAG)) {
            symbol.setSamples(samplesProcessor.getSamples());
            symbols.add(symbol);
            symbol = new OpModelSymbol();
        } else if (name.equals(SYMBOLS_TAG)) {
            OprofileSAXHandler.getInstance(callData).pop(SYMBOLS_TAG);
        }
    }

    /**
     * Return all parsed samples
     * @return s the parsed symbols
     */
    public OpModelSymbol[] getSymbols() {
        OpModelSymbol [] s = new OpModelSymbol[symbols.size()];
        symbols.toArray(s);
        return s;
    }
}