Example usage for org.apache.commons.chain CatalogFactory getCatalog

Introduction

In this page you can find the example usage for org.apache.commons.chain CatalogFactory getCatalog.

Prototype

public abstract Catalog getCatalog();

Source Link

Document

Gets the default instance of Catalog associated with the factory (if any); otherwise, return null.

Usage

From source file:org.apache.struts.chain.commands.generic.WrappingLookupCommand.java

/**
 * <p>Return the Command to process for this Context.</p>
 *
 * @param context The Context we are processing
 * @return The Command to process for this Context
 *///from  w w  w  .jav a2s . c o m
protected Command getCommand(Context context) {
    CatalogFactory catalogFactory = CatalogFactory.getInstance();
    String catalogName = getCatalogName();
    Catalog catalog;

    if (catalogName == null) {
        catalog = catalogFactory.getCatalog();
        catalogName = "{default}"; // for debugging purposes
    } else {
        catalog = catalogFactory.getCatalog(catalogName);
    }

    if (catalog == null) {
        throw new IllegalArgumentException("Cannot find catalog '" + catalogName + "'");
    }

    Command command;
    String name = getName();

    if (name == null) {
        name = (String) context.get(getNameKey());
    }

    if (name != null) {
        if (LOG.isDebugEnabled()) {
            LOG.debug("Lookup command " + name + " in catalog " + catalogName);
        }

        command = catalog.getCommand(name);

        if (LOG.isDebugEnabled()) {
            LOG.debug("Found command " + command + ";" + " optional: " + isOptional());
        }

        if ((command == null) && !isOptional()) {
            throw new IllegalArgumentException(
                    "Cannot find command " + "'" + name + "' in catalog '" + catalogName + "'");
        } else {
            return command;
        }
    } else {
        throw new IllegalArgumentException("No command name");
    }
}

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