Examples with ClassReader org.apache.xbean.asm5.ClassReader used on opensource projects

Example 16 with ClassReader

use of org.apache.xbean.asm5.ClassReader in project apex-core by apache.

the class FastClassIndexReaderTest method testPerformance.

@Test
public void testPerformance() throws Exception {
    String javahome = System.getProperty("java.home");
    String jdkJar = javahome + "/lib/rt.jar";
    JarFile jar = new JarFile(jdkJar);
    java.util.Enumeration<JarEntry> entriesEnum = jar.entries();
    long time = System.currentTimeMillis();
    while (entriesEnum.hasMoreElements()) {
        JarEntry jarEntry = entriesEnum.nextElement();
        if (jarEntry.getName().endsWith("class")) {
            InputStream ins = jar.getInputStream(jarEntry);
            //FastClassSignatureReader fastClassSignatureReader = new FastClassSignatureReader(ins);
            ClassReader classReader = new ClassReader(ins);
            ClassNodeType classN = new ClassNodeType();
            classReader.accept(classN, ClassReader.SKIP_CODE);
            CompactClassNode ccn = CompactUtil.compactClassNode(classN);
            ins.close();
        }
    }
    LOG.info("The time to scan jdk using ASM ClassReader {} ", System.currentTimeMillis() - time);
    jar.close();
    jar = new JarFile(jdkJar);
    entriesEnum = jar.entries();
    time = System.currentTimeMillis();
    while (entriesEnum.hasMoreElements()) {
        JarEntry jarEntry = entriesEnum.nextElement();
        if (jarEntry.getName().endsWith("class")) {
            InputStream ins = jar.getInputStream(jarEntry);
            FastClassIndexReader fastClassIndexReader = new FastClassIndexReader(ins);
            ins.close();
        }
    }
    jar.close();
    LOG.info("The time to scan jdk using FastClassIndexReader {} ", System.currentTimeMillis() - time);
}