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org.unix4j.unix.uniq.UniqArguments Maven / Gradle / Ivy
package org.unix4j.unix.uniq;
import java.util.List;
import java.util.Map;
import java.util.Arrays;
import org.unix4j.command.Arguments;
import org.unix4j.context.ExecutionContext;
import org.unix4j.convert.ValueConverter;
import org.unix4j.option.DefaultOptionSet;
import org.unix4j.util.ArgsUtil;
import org.unix4j.util.ArrayUtil;
import org.unix4j.variable.Arg;
import org.unix4j.variable.VariableContext;
import org.unix4j.unix.Uniq;
/**
* Arguments and options for the {@link Uniq uniq} command.
*/
public final class UniqArguments implements Arguments {
private final UniqOptions options;
// operand:
private java.io.File file;
private boolean fileIsSet = false;
// operand:
private String path;
private boolean pathIsSet = false;
// operand:
private String[] args;
private boolean argsIsSet = false;
/**
* Constructor to use if no options are specified.
*/
public UniqArguments() {
this.options = UniqOptions.EMPTY;
}
/**
* Constructor with option set containing the selected command options.
*
* @param options the selected options
* @throws NullPointerException if the argument is null
*/
public UniqArguments(UniqOptions options) {
if (options == null) {
throw new NullPointerException("options argument cannot be null");
}
this.options = options;
}
/**
* Returns the options set containing the selected command options. Returns
* an empty options set if no option has been selected.
*
* @return set with the selected options
*/
public UniqOptions getOptions() {
return options;
}
/**
* Constructor string arguments encoding options and arguments, possibly
* also containing variable expressions.
*
* @param args string arguments for the command
* @throws NullPointerException if args is null
*/
public UniqArguments(String... args) {
this();
this.args = args;
this.argsIsSet = true;
}
private Object[] resolveVariables(VariableContext context, String... unresolved) {
final Object[] resolved = new Object[unresolved.length];
for (int i = 0; i < resolved.length; i++) {
final String expression = unresolved[i];
if (Arg.isVariable(expression)) {
resolved[i] = resolveVariable(context, expression);
} else {
resolved[i] = expression;
}
}
return resolved;
}
private V convertList(ExecutionContext context, String operandName, Class operandType, List values) {
if (values.size() == 1) {
final Object value = values.get(0);
return convert(context, operandName, operandType, value);
}
return convert(context, operandName, operandType, values);
}
private Object resolveVariable(VariableContext context, String variable) {
final Object value = context.getValue(variable);
if (value != null) {
return value;
}
throw new IllegalArgumentException("cannot resolve variable " + variable +
" in command: uniq " + this);
}
private V convert(ExecutionContext context, String operandName, Class operandType, Object value) {
final ValueConverter converter = context.getValueConverterFor(operandType);
final V convertedValue;
if (converter != null) {
convertedValue = converter.convert(value);
} else {
if (UniqOptions.class.equals(operandType)) {
convertedValue = operandType.cast(UniqOptions.CONVERTER.convert(value));
} else {
convertedValue = null;
}
}
if (convertedValue != null) {
return convertedValue;
}
throw new IllegalArgumentException("cannot convert --" + operandName +
" value '" + value + "' into the type " + operandType.getName() +
" for uniq command");
}
@Override
public UniqArguments getForContext(ExecutionContext context) {
if (context == null) {
throw new NullPointerException("context cannot be null");
}
if (!argsIsSet || args.length == 0) {
//nothing to resolve
return this;
}
//check if there is at least one variable
boolean hasVariable = false;
for (final String arg : args) {
if (arg != null && arg.startsWith("$")) {
hasVariable = true;
break;
}
}
//resolve variables
final Object[] resolvedArgs = hasVariable ? resolveVariables(context.getVariableContext(), this.args) : this.args;
//convert now
final List defaultOperands = Arrays.asList("path");
final Map> map = ArgsUtil.parseArgs("options", defaultOperands, resolvedArgs);
final UniqOptions.Default options = new UniqOptions.Default();
final UniqArguments argsForContext = new UniqArguments(options);
for (final Map.Entry> e : map.entrySet()) {
if ("file".equals(e.getKey())) {
final java.io.File value = convertList(context, "file", java.io.File.class, e.getValue());
argsForContext.setFile(value);
} else if ("path".equals(e.getKey())) {
final String value = convertList(context, "path", String.class, e.getValue());
argsForContext.setPath(value);
} else if ("args".equals(e.getKey())) {
throw new IllegalStateException("invalid operand '" + e.getKey() + "' in uniq command args: " + Arrays.toString(args));
} else if ("options".equals(e.getKey())) {
final UniqOptions value = convertList(context, "options", UniqOptions.class, e.getValue());
options.setAll(value);
} else {
throw new IllegalStateException("invalid operand '" + e.getKey() + "' in uniq command args: " + Arrays.toString(args));
}
}
return argsForContext;
}
/**
* Returns the {@code } operand value: The files or directories used as starting point for the listing;
relative paths are not resolved (use the string path argument to
enable relative path resolving based on the current working
directory).
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public java.io.File getFile() {
if (fileIsSet) {
return file;
}
throw new IllegalStateException("operand has not been set: " + file);
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setFile(java.io.File)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isFileSet() {
return fileIsSet;
}
/**
* Sets {@code }: The files or directories used as starting point for the listing;
relative paths are not resolved (use the string path argument to
enable relative path resolving based on the current working
directory).
*
* @param file the value for the {@code } operand
*/
public void setFile(java.io.File file) {
this.file = file;
this.fileIsSet = true;
}
/**
* Returns the {@code } operand value (variables are NOT resolved): The files or directories used as starting point for the listing;
wildcards * and ? are supported; relative paths are resolved on the
basis of the current working directory.
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
* @see #getPath(ExecutionContext)
*/
public String getPath() {
if (pathIsSet) {
return path;
}
throw new IllegalStateException("operand has not been set: " + path);
}
/**
* Returns the {@code } (variables are resolved): The files or directories used as starting point for the listing;
wildcards * and ? are supported; relative paths are resolved on the
basis of the current working directory.
*
* @param context the execution context used to resolve variables
* @return the {@code } operand value after resolving variables
* @throws IllegalStateException if this operand has never been set
* @see #getPath()
*/
public String getPath(ExecutionContext context) {
final String value = getPath();
if (Arg.isVariable(value)) {
final Object resolved = resolveVariable(context.getVariableContext(), value);
final String converted = convert(context, "path", String.class, resolved);
return converted;
}
return value;
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setPath(String)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isPathSet() {
return pathIsSet;
}
/**
* Sets {@code }: The files or directories used as starting point for the listing;
wildcards * and ? are supported; relative paths are resolved on the
basis of the current working directory.
*
* @param path the value for the {@code } operand
*/
public void setPath(String path) {
this.path = path;
this.pathIsSet = true;
}
/**
* Returns the {@code } operand value: String arguments defining the options and operands for the command.
Options can be specified by acronym (with a leading dash "-") or by
long name (with two leading dashes "--"). Operands other than the
default "--path" operand have to be prefixed with the operand
name.
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public String[] getArgs() {
if (argsIsSet) {
return args;
}
throw new IllegalStateException("operand has not been set: " + args);
}
/**
* Returns true if the {@code } operand has been set.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isArgsSet() {
return argsIsSet;
}
/**
* Returns true if the {@code --}{@link UniqOption#count count} option
* is set. The option is also known as {@code -}c option.
*
* Description: Precedes each output line with a count of the number of times the
line occurred in the input.
*
* @return true if the {@code --count} or {@code -c} option is set
*/
public boolean isCount() {
return getOptions().isSet(UniqOption.count);
}
/**
* Returns true if the {@code --}{@link UniqOption#duplicatedOnly duplicatedOnly} option
* is set. The option is also known as {@code -}d option.
*
* Description: Suppresses the writing of lines that are not repeated in the input.
*
* @return true if the {@code --duplicatedOnly} or {@code -d} option is set
*/
public boolean isDuplicatedOnly() {
return getOptions().isSet(UniqOption.duplicatedOnly);
}
/**
* Returns true if the {@code --}{@link UniqOption#uniqueOnly uniqueOnly} option
* is set. The option is also known as {@code -}u option.
*
* Description: Suppresses the writing of lines that are repeated in the input.
*
* @return true if the {@code --uniqueOnly} or {@code -u} option is set
*/
public boolean isUniqueOnly() {
return getOptions().isSet(UniqOption.uniqueOnly);
}
/**
* Returns true if the {@code --}{@link UniqOption#global global} option
* is set. The option is also known as {@code -}g option.
*
* Description: Suppresses repeated lines globally, that is, if lines are
non-adjacent. This option guarantees unique output lines even if the
input lines are not sorted.
*
* @return true if the {@code --global} or {@code -g} option is set
*/
public boolean isGlobal() {
return getOptions().isSet(UniqOption.global);
}
@Override
public String toString() {
// ok, we have options or arguments or both
final StringBuilder sb = new StringBuilder();
if (argsIsSet) {
for (String arg : args) {
if (sb.length() > 0) sb.append(' ');
sb.append(arg);
}
} else {
// first the options
if (options.size() > 0) {
sb.append(DefaultOptionSet.toString(options));
}
// operand:
if (fileIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("file");
sb.append(" ").append(toString(getFile()));
}
// operand:
if (pathIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("path");
sb.append(" ").append(toString(getPath()));
}
// operand:
if (argsIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("args");
sb.append(" ").append(toString(getArgs()));
}
}
return sb.toString();
}
private static String toString(Object value) {
if (value != null && value.getClass().isArray()) {
return ArrayUtil.toString(value);
}
return String.valueOf(value);
}
}
