Example usage for com.google.common.base Preconditions checkState

Introduction

In this page you can find the example usage for com.google.common.base Preconditions checkState.

Prototype

public static void checkState(boolean expression)

Source Link

Document

Ensures the truth of an expression involving the state of the calling instance, but not involving any parameters to the calling method.

Usage

From source file:org.sonar.java.ast.visitors.FileVisitor.java

@Override
public void leaveFile(AstNode astNode) {
    Preconditions.checkState(getContext().peekSourceCode().isType(SourceFile.class));
    getContext().popSourceCode();
}

From source file:com.buaa.cfs.fs.ByteBufferUtil.java

/**
 * Perform a fallback read.//from   w  w  w. j  a  va2s  . c  o m
 */
public static ByteBuffer fallbackRead(InputStream stream, ByteBufferPool bufferPool, int maxLength)
        throws IOException {
    if (bufferPool == null) {
        throw new UnsupportedOperationException("zero-copy reads "
                + "were not available, and you did not provide a fallback " + "ByteBufferPool.");
    }
    boolean useDirect = streamHasByteBufferRead(stream);
    ByteBuffer buffer = bufferPool.getBuffer(useDirect, maxLength);
    if (buffer == null) {
        throw new UnsupportedOperationException(
                "zero-copy reads " + "were not available, and the ByteBufferPool did not provide " + "us with "
                        + (useDirect ? "a direct" : "an indirect") + "buffer.");
    }
    Preconditions.checkState(buffer.capacity() > 0);
    Preconditions.checkState(buffer.isDirect() == useDirect);
    maxLength = Math.min(maxLength, buffer.capacity());
    boolean success = false;
    try {
        if (useDirect) {
            buffer.clear();
            buffer.limit(maxLength);
            ByteBufferReadable readable = (ByteBufferReadable) stream;
            int totalRead = 0;
            while (true) {
                if (totalRead >= maxLength) {
                    success = true;
                    break;
                }
                int nRead = readable.read(buffer);
                if (nRead < 0) {
                    if (totalRead > 0) {
                        success = true;
                    }
                    break;
                }
                totalRead += nRead;
            }
            buffer.flip();
        } else {
            buffer.clear();
            int nRead = stream.read(buffer.array(), buffer.arrayOffset(), maxLength);
            if (nRead >= 0) {
                buffer.limit(nRead);
                success = true;
            }
        }
    } finally {
        if (!success) {
            // If we got an error while reading, or if we are at EOF, we
            // don't need the buffer any more.  We can give it back to the
            // bufferPool.
            bufferPool.putBuffer(buffer);
            buffer = null;
        }
    }
    return buffer;
}

From source file:org.b1.pack.cli.FsFileContent.java

@Override
public void writeTo(OutputStream stream, long start, Long end) throws IOException {
    System.out.println("Adding " + file);
    long length = (end != null ? end : file.length()) - start;
    InputSupplier<InputStream> slice = ByteStreams.slice(Files.newInputStreamSupplier(file), start, length);
    Preconditions.checkState(ByteStreams.copy(slice, stream) == length);
}

From source file:com.cloudera.impala.analysis.AlterTableRenameStmt.java

public AlterTableRenameStmt(TableName oldTableName, TableName newTableName) {
    super(oldTableName);
    Preconditions.checkState(newTableName != null && !newTableName.isEmpty());
    this.newTableName = newTableName;
}

From source file:org.easy.ldap.ServiceFactory.java

/**
 * Creates service for LDAP CRUD operations
 * //from   w  ww.j  ava  2s.com
 * @param properties
 *            - LDAP connection and structure properties.
 * @return
 */
public LdapAdminService createAdminService() {
    Preconditions.checkState(properties != null);
    return new AdminServiceImpl(properties);
}

From source file:com.cloudera.impala.analysis.AlterTableDropColStmt.java

public AlterTableDropColStmt(TableName tableName, String colName) {
    super(tableName);
    Preconditions.checkState(colName != null && !colName.isEmpty());
    colName_ = colName;
}

From source file:com.threerings.tools.gxlate.UploadMojo.java

@Override
protected void run() throws Exception {
    Preconditions.checkState(keysFound.isEmpty());

    if (checkOnly()) {
        getLog().info("Comparing English strings to spreadsheet and reporting differences. "
                + "No changes will be made.");
    }//from w  ww. j av  a  2  s  .co m

    Document doc = new Document();
    Set<Integer> unused = Sets.newHashSet();
    for (PropsFile source : loadAllProps()) {
        Table table = doc.loadTable(Bundle.baseName(source.getFile().getName()));
        Index index = new Index(table, Field.ID.getColumnName());
        for (Domain.Row genRow : getFilteredRows(source)) {
            if (genRow.status == Rules.Status.IGNORE || genRow.status == Rules.Status.OMIT) {
                continue;
            }

            String error = DefaultTranslator.checkBraces(genRow.fields.english(), unused);
            if (error != null) {
                getLog().error(String.format("String %s %s", genRow.fields.id(), error));
                failures.add(new Exception(genRow.fields.id()));
                continue;
            }

            handleRow(table, index, genRow);
        }
        if (table.needsRefresh()) {
            getLog().info("Refreshing table to incorporate added rows");
            try {
                // TODO: add support for the index being refreshed somewhere
                table.refreshAddedRows();
            } catch (Exception ex) {
                getLog().error("Refresh failed", ex);
                failures.add(ex);
            }
        }
        if (removeRows) {
            doRemovals(table, index);
        }
    }
}

From source file:com.google.template.soy.sharedpasses.render.CountingFlushableAppendable.java

public CountingFlushableAppendable(Appendable appendable) {
    Preconditions.checkState(appendable instanceof Flushable);
    this.appendable = appendable;
    this.flushable = (Flushable) appendable;
}

From source file:com.moz.fiji.schema.util.JvmId.java

/**
 * Returns the Unix process ID of this JVM.
 *
 * @return the Unix process ID of this JVM.
 *///from   w  ww  .j a  v a2 s . com
public static int getPid() {
    try {
        final Process process = new ProcessBuilder("/bin/sh", "-c", "echo $PPID").start();
        try {
            Preconditions.checkState(process.waitFor() == 0);
        } catch (InterruptedException ie) {
            throw new RuntimeInterruptedException(ie);
        }
        final String pidStr = IOUtils.toString(process.getInputStream()).trim();
        return Integer.parseInt(pidStr);
    } catch (IOException ioe) {
        throw new FijiIOException(ioe);
    }
}

From source file:io.divolte.server.filesinks.gcs.DynamicDelegatingOutputStream.java

public void attachDelegate(final OutputStream newDelegate) {
    Preconditions.checkState(wrapped == null);
    wrapped = Objects.requireNonNull(newDelegate);
}