Example usage for java.lang Object hashCode

Introduction

In this page you can find the example usage for java.lang Object hashCode.

Prototype

@HotSpotIntrinsicCandidate
public native int hashCode();

Source Link

Document

Returns a hash code value for the object.

Usage

From source file:gsn.vsensor.ChartVirtualSensor.java

public boolean equals(Object obj) {
    if (obj == null && !(obj instanceof ChartInfo))
        return false;
    return (obj.hashCode() == hashCode());
}

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From source file:com.taobao.tddl.common.util.TDDLMBeanServer.java

private void registerMBean0(Object o, String name) {
    // MBean/*w w  w  .  j a v  a 2 s .c om*/
    if (null != mbs) {
        try {
            mbs.registerMBean(o, new ObjectName(o.getClass().getPackage().getName() + ":type="
                    + o.getClass().getSimpleName()
                    + (null == name ? (",id=" + o.hashCode()) : (",name=" + name + "-" + o.hashCode()))));
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

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From source file:CompactHashSet.java

/**
 * Removes the specified element from the set.
 *//*from   w  w w . j  a va2  s .  c o  m*/
@SuppressWarnings("unchecked")
public boolean remove(Object o) {
    if (o == null)
        o = nullObject;

    int hash = o.hashCode();
    int index = (hash & 0x7FFFFFFF) % objects.length;
    int offset = 1;

    // search for the object (continue while !null and !this object)
    while (objects[index] != null && !(objects[index].hashCode() == hash && objects[index].equals(o))) {
        index = ((index + offset) & 0x7FFFFFFF) % objects.length;
        offset = offset * 2 + 1;

        if (offset == -1)
            offset = 2;
    }

    // we found the right position, now do the removal
    if (objects[index] != null) {
        // we found the object

        // same problem here as with add
        objects[index] = (E) deletedObject;
        modCount++;
        elements--;
        return true;
    } else
        // we did not find the object
        return false;
}

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From source file:com.jdon.aop.interceptor.PoolInterceptor.java

public Object invoke(MethodInvocation invocation) throws Throwable {
    ProxyMethodInvocation proxyMethodInvocation = (ProxyMethodInvocation) invocation;
    TargetMetaDef targetMetaDef = targetMetaRequestsHolder.getTargetMetaRequest().getTargetMetaDef();
    if (targetMetaDef.isEJB())
        return invocation.proceed();

    if (!isPoolabe(targetMetaDef)) {
        // Debug.logVerbose("[JdonFramework] target service is not Poolable: "
        // + targetMetaDef.getClassName() + " pool unactiive", module);
        return invocation.proceed(); // interceptor
    }/*from   w w w  .ja v a2 s  . c  om*/
    Debug.logVerbose("[JdonFramework] enter PoolInterceptor", module);
    CommonsPoolFactory commonsPoolFactory = (CommonsPoolFactory) poolFactorys.get(targetMetaDef.getCacheKey());
    if (commonsPoolFactory == null) {
        commonsPoolFactory = getCommonsPoolFactory(targetMetaDef);
        poolFactorys.put(targetMetaDef.getCacheKey(), commonsPoolFactory);
    }

    Pool pool = commonsPoolFactory.getPool();
    Object poa = null;
    Object result = null;
    try {
        poa = pool.acquirePoolable();
        Debug.logVerbose("[JdonFramework] borrow a object:" + targetMetaDef.getClassName() + " id:"
                + poa.hashCode() + " from pool", module);
        Debug.logVerbose(
                "[JdonFramework]pool state: active=" + pool.getNumActive() + " free=" + pool.getNumIdle(),
                module);

        // set the object that borrowed from pool to MethodInvocation
        // so later other Interceptors or MethodInvocation can use it!
        proxyMethodInvocation.setThis(poa);
        result = invocation.proceed();
    } catch (Exception ex) {
        Debug.logError(ex, module);
    } finally {
        if (poa != null) {
            pool.releasePoolable(poa);
            Debug.logVerbose("[JdonFramework] realease a object:" + targetMetaDef.getClassName() + " to pool",
                    module);
        }
    }
    return result;
}

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From source file:CompactHashMap.java

/**
 * INTERNAL: Rehashes the hashmap to a bigger size.
 *///from w w  w  .jav a 2 s  .  c om
protected void rehash(int newCapacity) {
    int oldCapacity = keys.length;
    K[] newKeys = (K[]) new Object[newCapacity];
    V[] newValues = (V[]) new Object[newCapacity];

    for (int ix = 0; ix < oldCapacity; ix++) {
        Object k = keys[ix];
        if (k == null || k == deletedObject)
            continue;

        int hash = k.hashCode();
        int index = (hash & 0x7FFFFFFF) % newCapacity;
        int offset = 1;

        // search for the key
        while (newKeys[index] != null) { // no need to test for duplicates
            index = ((index + offset) & 0x7FFFFFFF) % newCapacity;
            offset = offset * 2 + 1;

            if (offset == -1)
                offset = 2;
        }

        newKeys[index] = (K) k;
        newValues[index] = values[ix];
    }

    keys = newKeys;
    values = newValues;
    freecells = keys.length - elements;
}

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From source file:ReferenceCountMap.java

/**
 * Standard base slot computation for a key.
 * //from  w ww . j a  va 2 s. c  om
 * @param key key value to be computed
 * @return base slot for key
 */
private final int standardSlot(Object key) {
    return (key.hashCode() & Integer.MAX_VALUE) % m_arraySize;
}

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From source file:com.github.aptd.simulation.elements.IBaseElement.java

@Override
public final boolean equals(final Object p_object) {
    return (p_object != null) && (p_object instanceof IElement<?>) && (p_object.hashCode() == this.hashCode());
}

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From source file:CompactHashSet.java

/**
 * Adds the specified element to this set if it is not already present.
 * /*  w w w  . ja  v  a  2 s  .c o  m*/
 * @param o
 *            element to be added to this set.
 * @return <tt>true</tt> if the set did not already contain the specified
 *         element.
 */
@SuppressWarnings("unchecked")
public boolean add(Object o) {
    if (o == null)
        o = nullObject;

    int hash = o.hashCode();
    int index = (hash & 0x7FFFFFFF) % objects.length;
    int offset = 1;
    int deletedix = -1;

    // search for the object (continue while !null and !this object)
    while (objects[index] != null && !(objects[index].hashCode() == hash && objects[index].equals(o))) {

        // if there's a deleted object here we can put this object here,
        // provided it's not in here somewhere else already
        if (objects[index] == deletedObject)
            deletedix = index;

        index = ((index + offset) & 0x7FFFFFFF) % objects.length;
        offset = offset * 2 + 1;

        if (offset == -1)
            offset = 2;
    }

    if (objects[index] == null) { // wasn't present already
        if (deletedix != -1) // reusing a deleted cell
            index = deletedix;
        else
            freecells--;

        modCount++;
        elements++;

        // here we face a problem regarding generics:
        // add(E o) is not possible because of the null Object. We cant do
        // 'new E()' or '(E) new Object()'
        // so adding an empty object is a problem here
        // If (! o instanceof E) : This will cause a class cast exception
        // If (o instanceof E) : This will work fine

        objects[index] = (E) o;

        // do we need to rehash?
        if (1 - (freecells / (double) objects.length) > LOAD_FACTOR)
            rehash();
        return true;
    } else
        // was there already
        return false;
}

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From source file:org.apache.wsrp4j.persistence.xml.driver.PersistentHandlerImpl.java

/**
 * Restore all known XML files from the persistent store into the
 * PersistentDataObject. The class type, which is part of the filename
 * is stored in the PersistentInformation object of the
 * PersistentDataObject./*from  w  w w .  ja  v  a2  s. com*/
 *
 * @param persistentDataObject
 * @return PersistentDataObject
 *
 * @throws WSRPException
 */
public PersistentDataObject restoreMultiple(PersistentDataObject persistentDataObject) throws WSRPException {

    String MN = "restoreMultiple";

    if (log.isDebugEnabled()) {
        log.debug(Utility.strEnter(MN));
    }

    Mapping mapping = null;
    Unmarshaller unmarshaller = null;

    try {

        PersistentInformationXML persistentInformation = (PersistentInformationXML) persistentDataObject
                .getPersistentInformation();

        if (persistentInformation.getMappingFileName() != null) {

            mapping = new Mapping();
            mapping.loadMapping(persistentInformation.getMappingFileName());
            unmarshaller = new Unmarshaller(mapping);
        }

        File file = new File(persistentInformation.getStoreDirectory());

        if (file.exists()) {

            File[] files = file.listFiles();

            for (int x = 0; x < files.length; x++) {

                if (files[x].isFile()) {

                    String currentFileName = files[x].getName();
                    // check for valid xml file
                    if (currentFileName.endsWith(persistentInformation.getExtension())) {

                        // check for valid object
                        if (currentFileName.startsWith(persistentInformation.getFilenameStub())) {
                            // load object
                            try {

                                FileReader fileReader = new FileReader(files[x]);

                                ((PersistentDataObjectXML) persistentDataObject).unMarshalFile(fileReader,
                                        unmarshaller);

                                fileReader.close();

                                Object o = persistentDataObject.getLastElement();
                                int hashCode = o.hashCode();
                                String code = new Integer(hashCode).toString();
                                _filenameMap.put(code, files[x].getAbsolutePath());

                                if (log.isDebugEnabled()) {
                                    log.debug("File: " + files[x].getAbsolutePath() + " added with hashCode = "
                                            + code);
                                }

                            } catch (Exception e) {

                                // restore error
                                WSRPXHelper.throwX(log, ErrorCodes.RESTORE_OBJECT_ERROR, e);
                            }
                        }
                    }
                }
            }
        }
    } catch (Exception e) {
        // restore error
        WSRPXHelper.throwX(log, ErrorCodes.RESTORE_OBJECT_ERROR, e);
    }

    if (log.isDebugEnabled()) {
        log.debug(Utility.strExit(MN));
    }

    return persistentDataObject;

}

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From source file:org.lightjason.agentspeak.common.CPath.java

@Override
@SuppressFBWarnings("EQ_CHECK_FOR_OPERAND_NOT_COMPATIBLE_WITH_THIS")
public final boolean equals(final Object p_object) {
    return (p_object != null) && (((p_object instanceof IPath) && (this.hashCode() == p_object.hashCode()))
            || ((p_object instanceof String) && (this.getPath().hashCode() == p_object.hashCode())));
}

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