org.softao.jassandra.Column.java Source code

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Here is the source code for org.softao.jassandra.Column.java

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/*
 * Copyright (C) 2010 Softao.Org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.softao.jassandra;

import java.util.ArrayList;
import java.util.List;

import com.google.common.collect.ImmutableList;

/**
 * The Class SimpleColumn.
 */
public class Column implements IColumn {

    /** The m name. */
    private ByteArray mName;

    /** The m timestamp. */
    private long mTimestamp;

    /** The m value. */
    private ByteArray mValue;

    /** The m columns. */
    private List<IColumn> mColumns;

    /** The m is super. */
    private final boolean mIsSuper;

    /**
     * Instantiates a new simple column.
     * 
     * @param isSuper
     *            the is super
     */
    public Column(boolean isSuper) {
        mIsSuper = isSuper;
        mTimestamp = System.currentTimeMillis();
        if (isSuper) {
            mColumns = new ArrayList<IColumn>();
        }
    }

    /**
     * Instantiates a new simple column.
     * 
     * @param name
     *            the name
     * @param value
     *            the value
     * @param timestamp
     *            the timestamp
     */
    public Column(ByteArray name, ByteArray value, long timestamp) {
        this(false);
        mName = name;
        mValue = value;
        mTimestamp = timestamp;
    }

    /**
     * Instantiates a new simple column.
     * 
     * @param name
     *            the name
     * @param columns
     *            the columns
     */
    public Column(ByteArray name, List<IColumn> columns) {
        this(true);
        mName = name;
        mColumns.addAll(columns);
    }

    /**
     * Gets the columns.
     * 
     * @return the columns
     * @throws JassandraException
     *             the jassandra exception
     */
    @Override
    public List<IColumn> getColumns() throws JassandraException {
        if (!isSuper()) {
            throw new JassandraException("Only super column supports getColumns.");
        }

        ImmutableList.Builder<IColumn> builder = ImmutableList.builder();
        builder.addAll(mColumns);
        return builder.build();
    }

    /**
     * Adds the columns.
     * 
     * @param columns
     *            the columns
     * @throws JassandraException
     *             the jassandra exception
     */
    public void addColumns(IColumn... columns) throws JassandraException {
        if (!isSuper()) {
            throw new JassandraException("Only super column supports addColumns.");
        }

        if (columns == null || columns.length == 0) {
            return;
        }
        for (IColumn column : columns) {
            mColumns.add(column);
        }
    }

    /**
     * Gets the name.
     * 
     * @return the name
     */
    @Override
    public ByteArray getName() {
        return mName;
    }

    /**
     * Sets the name.
     * 
     * @param value
     *            the new name
     */
    public void setName(ByteArray value) {
        mName = value;
    }

    /**
     * Gets the timestamp.
     * 
     * @return the timestamp
     * @throws JassandraException
     *             the jassandra exception
     */
    @Override
    public long getTimestamp() throws JassandraException {
        return mTimestamp;
    }

    /**
     * Sets the timestamp.
     * 
     * @param value
     *            the new timestamp
     */
    public void setTimestamp(long value) {
        mTimestamp = value;
    }

    /**
     * Gets the value.
     * 
     * @return the value
     * @throws JassandraException
     *             the jassandra exception
     */
    @Override
    public ByteArray getValue() throws JassandraException {
        if (isSuper()) {
            throw new JassandraException("Super column doesnot support getValue.");
        }
        return mValue;
    }

    /**
     * Sets the value.
     * 
     * @param value
     *            the new value
     * @throws JassandraException
     *             the jassandra exception
     */
    public void setValue(ByteArray value) throws JassandraException {
        if (isSuper()) {
            throw new JassandraException("Super column doesnot support setValue.");
        }

        mValue = value;
    }

    /**
     * Checks if is super.
     * 
     * @return true, if is super
     */
    @Override
    public boolean isSuper() {
        return mIsSuper;
    }

}