org.unix4j.unix.from.FromArguments Maven / Gradle / Ivy
package org.unix4j.unix.from;
import org.unix4j.command.Arguments;
import org.unix4j.context.ExecutionContext;
import org.unix4j.convert.ValueConverter;
import org.unix4j.util.ArrayUtil;
import org.unix4j.variable.Arg;
import org.unix4j.variable.VariableContext;
import org.unix4j.unix.From;
/**
* Arguments and options for the {@link From from} command.
*/
public final class FromArguments implements Arguments {
// operand:
private String path;
private boolean pathIsSet = false;
// operand:
private org.unix4j.io.Input input;
private boolean inputIsSet = false;
/**
* Constructor to use if no options are specified.
*/
public FromArguments() {
super();
}
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: from " + 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 {
convertedValue = null;
}
if (convertedValue != null) {
return convertedValue;
}
throw new IllegalArgumentException("cannot convert --" + operandName +
" value '" + value + "' into the type " + operandType.getName() +
" for from command");
}
@Override
public FromArguments getForContext(ExecutionContext context) {
if (context == null) {
throw new NullPointerException("context cannot be null");
}
//no String... args for this command, hence nothing to resolve
return this;
}
/**
* Returns the {@code } operand value (variables are NOT resolved): the file to use as input; 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 file to use as input; 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 file to use as input; 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: the input object to read from
*
* @return the {@code } operand value (variables are not resolved)
* @throws IllegalStateException if this operand has never been set
*
*/
public org.unix4j.io.Input getInput() {
if (inputIsSet) {
return input;
}
throw new IllegalStateException("operand has not been set: " + input);
}
/**
* Returns true if the {@code } operand has been set.
*
* Note that this method returns true even if {@code null} was passed to the
* {@link #setInput(org.unix4j.io.Input)} method.
*
* @return true if the setter for the {@code } operand has
* been called at least once
*/
public boolean isInputSet() {
return inputIsSet;
}
/**
* Sets {@code }: the input object to read from
*
* @param input the value for the {@code } operand
*/
public void setInput(org.unix4j.io.Input input) {
this.input = input;
this.inputIsSet = true;
}
@Override
public String toString() {
// ok, we have options or arguments or both
final StringBuilder sb = new StringBuilder();
{
// operand:
if (pathIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("path");
sb.append(" ").append(toString(getPath()));
}
// operand:
if (inputIsSet) {
if (sb.length() > 0) sb.append(' ');
sb.append("--").append("input");
sb.append(" ").append(toString(getInput()));
}
}
return sb.toString();
}
private static String toString(Object value) {
if (value != null && value.getClass().isArray()) {
return ArrayUtil.toString(value);
}
return String.valueOf(value);
}
}