org.apache.accumulo.shell.commands.ConstraintCommand.java Source code

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Here is the source code for org.apache.accumulo.shell.commands.ConstraintCommand.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.accumulo.shell.commands;

import java.util.Map.Entry;

import org.apache.accumulo.core.constraints.Constraint;
import org.apache.accumulo.shell.Shell;
import org.apache.accumulo.shell.Shell.Command;
import org.apache.accumulo.shell.ShellCommandException;
import org.apache.accumulo.shell.ShellCommandException.ErrorCode;
import org.apache.accumulo.shell.ShellOptions;
import org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;

public class ConstraintCommand extends Command {
    protected Option namespaceOpt;

    @Override
    public int execute(final String fullCommand, final CommandLine cl, final Shell shellState) throws Exception {
        final String tableName;
        final String namespace;

        if (cl.hasOption(namespaceOpt.getOpt())) {
            namespace = cl.getOptionValue(namespaceOpt.getOpt());
        } else {
            namespace = null;
        }

        if (cl.hasOption(OptUtil.tableOpt().getOpt()) || !shellState.getTableName().isEmpty()) {
            tableName = OptUtil.getTableOpt(cl, shellState);
        } else {
            tableName = null;
        }

        int i;
        switch (OptUtil.getAldOpt(cl)) {
        case ADD:
            for (String constraint : cl.getArgs()) {
                if (namespace != null) {
                    if (!shellState.getConnector().namespaceOperations().testClassLoad(namespace, constraint,
                            Constraint.class.getName())) {
                        throw new ShellCommandException(ErrorCode.INITIALIZATION_FAILURE,
                                "Servers are unable to load " + constraint + " as type "
                                        + Constraint.class.getName());
                    }
                    i = shellState.getConnector().namespaceOperations().addConstraint(namespace, constraint);
                    shellState.getReader().println(
                            "Added constraint " + constraint + " to namespace " + namespace + " with number " + i);
                } else if (tableName != null && !tableName.isEmpty()) {
                    if (!shellState.getConnector().tableOperations().testClassLoad(tableName, constraint,
                            Constraint.class.getName())) {
                        throw new ShellCommandException(ErrorCode.INITIALIZATION_FAILURE,
                                "Servers are unable to load " + constraint + " as type "
                                        + Constraint.class.getName());
                    }
                    i = shellState.getConnector().tableOperations().addConstraint(tableName, constraint);
                    shellState.getReader().println(
                            "Added constraint " + constraint + " to table " + tableName + " with number " + i);
                } else {
                    throw new IllegalArgumentException("Please specify either a table or a namespace");
                }
            }
            break;
        case DELETE:
            for (String constraint : cl.getArgs()) {
                i = Integer.parseInt(constraint);
                if (namespace != null) {
                    shellState.getConnector().namespaceOperations().removeConstraint(namespace, i);
                    shellState.getReader().println("Removed constraint " + i + " from namespace " + namespace);
                } else if (tableName != null) {
                    shellState.getConnector().tableOperations().removeConstraint(tableName, i);
                    shellState.getReader().println("Removed constraint " + i + " from table " + tableName);
                } else {
                    throw new IllegalArgumentException("Please specify either a table or a namespace");
                }
            }
            break;
        case LIST:
            if (namespace != null) {
                for (Entry<String, Integer> property : shellState.getConnector().namespaceOperations()
                        .listConstraints(namespace).entrySet()) {
                    shellState.getReader().println(property.toString());
                }
            } else if (tableName != null) {
                for (Entry<String, Integer> property : shellState.getConnector().tableOperations()
                        .listConstraints(tableName).entrySet()) {
                    shellState.getReader().println(property.toString());
                }
            } else {
                throw new IllegalArgumentException("Please specify either a table or a namespace");
            }
        }

        return 0;
    }

    @Override
    public String description() {
        return "adds, deletes, or lists constraints for a table";
    }

    @Override
    public int numArgs() {
        return Shell.NO_FIXED_ARG_LENGTH_CHECK;
    }

    @Override
    public String usage() {
        return getName() + " <constraint>{ <constraint>}";
    }

    @Override
    public Options getOptions() {
        final Options o = new Options();
        o.addOptionGroup(OptUtil.addListDeleteGroup("constraint"));

        OptionGroup grp = new OptionGroup();
        grp.addOption(OptUtil.tableOpt("table to add, delete, or list constraints for"));
        namespaceOpt = new Option(ShellOptions.namespaceOption, "namespace", true,
                "name of a namespace to operate on");
        namespaceOpt.setArgName("namespace");
        grp.addOption(namespaceOpt);

        o.addOptionGroup(grp);
        return o;
    }
}