All Downloads are FREE. Search and download functionalities are using the official Maven repository.
Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance.
Project price only 1 $
You can buy this project and download/modify it how often you want.
org.unix4j.unix.cut.CutArguments Maven / Gradle / Ivy
package org.unix4j.unix.cut;
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.Cut;
/**
* Arguments and options for the {@link Cut cut} command.
*/
public final class CutArguments implements Arguments {
private final CutOptions options;
// operand:
private String delimiter;
private boolean delimiterIsSet = false;
// operand:
private char outputDelimiter;
private boolean outputDelimiterIsSet = false;
// operand:
private int[] indexes;
private boolean indexesIsSet = false;
// operand:
private org.unix4j.util.Range range;
private boolean rangeIsSet = false;
// operand:
private String[] args;
private boolean argsIsSet = false;
/**
* Constructor to use if no options are specified.
*/
public CutArguments() {
this.options = CutOptions.EMPTY;
}
/**
* Constructor with option set containing the selected command options.
*
* @param options the selected options
* @throws NullPointerException if the argument is null
*/
public CutArguments(CutOptions 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 CutOptions 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 CutArguments(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: cut " + 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 (CutOptions.class.equals(operandType)) {
convertedValue = operandType.cast(CutOptions.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 cut command");
}
@Override
public CutArguments 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("range");
final Map> map = ArgsUtil.parseArgs("options", defaultOperands, resolvedArgs);
final CutOptions.Default options = new CutOptions.Default();
final CutArguments argsForContext = new CutArguments(options);
for (final Map.Entry> e : map.entrySet()) {
if ("delimiter".equals(e.getKey())) {
final String value = convertList(context, "delimiter", String.class, e.getValue());
argsForContext.setDelimiter(value);
} else if ("outputDelimiter".equals(e.getKey())) {
final char value = convertList(context, "outputDelimiter", char.class, e.getValue());
argsForContext.setOutputDelimiter(value);
} else if ("indexes".equals(e.getKey())) {
final int[] value = convertList(context, "indexes", int[].class, e.getValue());
argsForContext.setIndexes(value);
} else if ("range".equals(e.getKey())) {
final org.unix4j.util.Range value = convertList(context, "range", org.unix4j.util.Range.class, e.getValue());
argsForContext.setRange(value);
} else if ("args".equals(e.getKey())) {
throw new IllegalStateException("invalid operand '" + e.getKey() + "' in cut command args: " + Arrays.toString(args));
} else if ("options".equals(e.getKey())) {
final CutOptions value = convertList(context, "options", CutOptions.class, e.getValue());
options.setAll(value);
} else {
throw new IllegalStateException("invalid operand '" + e.getKey() + "' in cut command args: " + Arrays.toString(args));
}
}
return argsForContext;
}
/**
* Returns the {@code } operand value (variables are NOT resolved): use as the output delimiter the default is to use the input delimiter
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
* @see #getDelimiter(ExecutionContext)
*/
public String getDelimiter() {
if (delimiterIsSet) {
return delimiter;
}
throw new IllegalStateException("operand has not been set: " + delimiter);
}
/**
* Returns the {@code } (variables are resolved): use as the output delimiter the default is to use the input delimiter
*
* @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 #getDelimiter()
*/
public String getDelimiter(ExecutionContext context) {
final String value = getDelimiter();
if (Arg.isVariable(value)) {
final Object resolved = resolveVariable(context.getVariableContext(), value);
final String converted = convert(context, "delimiter", 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 #setDelimiter(String)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isDelimiterSet() {
return delimiterIsSet;
}
/**
* Sets {@code }: use as the output delimiter the default is to use the input delimiter
*
* @param delimiter the value for the {@code } operand
*/
public void setDelimiter(String delimiter) {
this.delimiter = delimiter;
this.delimiterIsSet = true;
}
/**
* Returns the {@code } operand value: use as the output delimiter the default is to use the input delimiter
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public char getOutputDelimiter() {
if (outputDelimiterIsSet) {
return outputDelimiter;
}
throw new IllegalStateException("operand has not been set: " + outputDelimiter);
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setOutputDelimiter(char)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isOutputDelimiterSet() {
return outputDelimiterIsSet;
}
/**
* Sets {@code }: use as the output delimiter the default is to use the input delimiter
*
* @param outputDelimiter the value for the {@code } operand
*/
public void setOutputDelimiter(char outputDelimiter) {
this.outputDelimiter = outputDelimiter;
this.outputDelimiterIsSet = true;
}
/**
* Returns the {@code } operand value: select these chars/field based on the given indexes. Indexes are 1 based. i.e. the first character/field on a line has an index of 1.
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public int[] getIndexes() {
if (indexesIsSet) {
return indexes;
}
throw new IllegalStateException("operand has not been set: " + indexes);
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setIndexes(int[])} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isIndexesSet() {
return indexesIsSet;
}
/**
* Sets {@code }: select these chars/field based on the given indexes. Indexes are 1 based. i.e. the first character/field on a line has an index of 1.
*
* @param indexes the value for the {@code } operand
*/
public void setIndexes(int... indexes) {
this.indexes = indexes;
this.indexesIsSet = true;
}
/**
* Returns the {@code } operand value: select only these fields
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public org.unix4j.util.Range getRange() {
if (rangeIsSet) {
return range;
}
throw new IllegalStateException("operand has not been set: " + range);
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setRange(org.unix4j.util.Range)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isRangeSet() {
return rangeIsSet;
}
/**
* Sets {@code }: select only these fields
*
* @param range the value for the {@code } operand
*/
public void setRange(org.unix4j.util.Range range) {
this.range = range;
this.rangeIsSet = 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 "--range" operand have to be prefixed with the operand name
(e.g. "--indexes" for subsequent index operand values).
*
* @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 CutOption#chars chars} option
* is set. The option is also known as {@code -}c option.
*
* Description: The list specifies character positions.
*
* @return true if the {@code --chars} or {@code -c} option is set
*/
public boolean isChars() {
return getOptions().isSet(CutOption.chars);
}
/**
* Returns true if the {@code --}{@link CutOption#fields fields} option
* is set. The option is also known as {@code -}f option.
*
* Description: The list specifies fields, separated in the input by the field
delimiter character (see the -d option.) Output fields are
separated by a single occurrence of the field delimiter character.
*
* @return true if the {@code --fields} or {@code -f} option is set
*/
public boolean isFields() {
return getOptions().isSet(CutOption.fields);
}
@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 (delimiterIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("delimiter");
sb.append(" ").append(toString(getDelimiter()));
}
// operand:
if (outputDelimiterIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("outputDelimiter");
sb.append(" ").append(toString(getOutputDelimiter()));
}
// operand:
if (indexesIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("indexes");
sb.append(" ").append(toString(getIndexes()));
}
// operand:
if (rangeIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("range");
sb.append(" ").append(toString(getRange()));
}
// 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);
}
}
