svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.expressionevaluator / org.gvsig.expressionevaluator.lib / org.gvsig.expressionevaluator.lib.impl / src / main / java / org / gvsig / expressionevaluator / impl / DefaultCodeBuilder.java @ 43809
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package org.gvsig.expressionevaluator.impl; |
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import java.util.ArrayList; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.apache.commons.lang3.StringUtils; |
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import org.gvsig.expressionevaluator.Code; |
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import static org.gvsig.expressionevaluator.Code.CALLER; |
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import static org.gvsig.expressionevaluator.Code.CONSTANT; |
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import org.gvsig.expressionevaluator.Code.Caller; |
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import org.gvsig.expressionevaluator.Code.Caller.Arguments; |
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import org.gvsig.expressionevaluator.Code.Constant; |
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import static org.gvsig.expressionevaluator.Code.IDENTIFIER; |
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import org.gvsig.expressionevaluator.Code.Identifier; |
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import static org.gvsig.expressionevaluator.Code.UNDEFINED; |
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import org.gvsig.expressionevaluator.CodeBuilder; |
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import org.gvsig.expressionevaluator.Function; |
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import org.gvsig.expressionevaluator.Interpreter; |
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import org.gvsig.tools.exception.BaseException; |
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import org.gvsig.tools.visitor.Visitor; |
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|
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public class DefaultCodeBuilder implements CodeBuilder { |
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public class BaseCode implements Code { |
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@Override
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public int code() { |
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return UNDEFINED;
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} |
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// @Override
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// public String toString() {
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// return this.toString(this);
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// }
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//
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// private String toString(Code code) {
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// StringBuilder builder = new StringBuilder();
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// switch( code.code() ) {
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// case CONSTANT: {
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// Object value = ((Constant) code).value();
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// if( value instanceof CharSequence ) {
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// value = StringUtils.wrap(value.toString(), "'");
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// }
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// builder.append(value);
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// }
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// break;
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//
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// case IDENTIFIER:
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// builder.append(((Identifier) code).name());
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// break;
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//
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// case CALLER:
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// Caller caller = (Caller) code;
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// builder.append(caller.name());
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// builder.append("(");
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// if( caller.args() != null ) {
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// boolean skipcoma = true;
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// for( Code arg : caller.args() ) {
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// if( skipcoma ) {
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// skipcoma = false;
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// } else {
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// builder.append(", ");
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// }
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// builder.append(toString(arg));
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// }
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// }
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// builder.append(")");
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// break;
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// }
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// return builder.toString();
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// }
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@Override
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public void accept(Visitor visitor) throws BaseException { |
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visitor.visit(this);
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} |
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} |
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class BaseConstant extends BaseCode implements Constant { |
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private final Object value; |
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public BaseConstant(Object value) { |
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this.value = value;
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} |
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@Override
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public int code() { |
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return CONSTANT;
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} |
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@Override
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public Object value() { |
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return this.value; |
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} |
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@Override
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public String toString() { |
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StringBuilder builder = new StringBuilder(); |
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Object v = this.value(); |
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if( v instanceof CharSequence ) { |
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v = StringUtils.wrap(v.toString(), "'");
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} |
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builder.append(v); |
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return builder.toString();
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} |
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} |
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public class BaseIdentifier extends BaseCode implements Identifier { |
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String name;
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public BaseIdentifier(String name) { |
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this.name = name;
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} |
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@Override
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public int code() { |
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return IDENTIFIER;
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} |
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@Override
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public String name() { |
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return this.name; |
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} |
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@Override
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public String toString() { |
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StringBuilder builder = new StringBuilder(); |
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builder.append("[");
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builder.append(this.name());
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builder.append("]");
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return builder.toString();
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} |
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} |
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public class BaseArguments implements Arguments { |
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private final List<Code> args; |
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public BaseArguments() {
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this.args = new ArrayList<>(); |
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} |
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@Override
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public int count() { |
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if( args == null ) { |
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return 0; |
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} |
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return this.args.size(); |
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} |
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public void add(Code arg) { |
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this.args.add(arg);
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} |
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@Override
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public Iterator<Code> iterator() { |
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return this.args.iterator(); |
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} |
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@Override
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public Code get(int n) { |
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return this.args.get(n); |
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} |
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@Override
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public void accept(Visitor visitor) throws BaseException { |
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for( Code arg : this.args ) { |
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visitor.visit(arg); |
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} |
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} |
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@Override
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public String toString() { |
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if( args != null ) { |
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StringBuilder builder = new StringBuilder(); |
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boolean skipcoma = true; |
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for( Code arg : args ) {
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if( skipcoma ) {
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skipcoma = false;
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} else {
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builder.append(", ");
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} |
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builder.append(arg.toString()); |
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} |
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return builder.toString();
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} |
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return ""; |
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} |
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} |
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public class BaseCaller extends BaseCode implements Caller { |
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private final String name; |
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private final Arguments args; |
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private Function function;
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private final int type; |
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public BaseCaller(String name, int type, Arguments args) { |
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this.name = name;
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this.args = args;
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this.type = type;
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this.function = null; |
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} |
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@Override
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public int code() { |
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return CALLER;
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} |
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@Override
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public Object call(Interpreter interpreter, Object[] args) throws Exception { |
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return this.function.call(interpreter, args); |
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} |
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@Override
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public String name() { |
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return this.name; |
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} |
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@Override
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public Function function() {
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return this.function; |
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} |
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@Override
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public Function function(Function function) {
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this.function = function;
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return this.function; |
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} |
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@Override
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public Code.Caller.Arguments args() {
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return this.args; |
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} |
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@Override
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public int type() { |
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return this.type; |
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} |
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@Override
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public void accept(Visitor visitor) throws BaseException { |
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visitor.visit(this);
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this.args.accept(visitor);
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} |
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@Override
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public String toString() { |
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StringBuilder builder = new StringBuilder(); |
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builder.append(this.name());
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builder.append("(");
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if( this.args()!=null ) { |
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builder.append(this.args().toString());
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} |
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builder.append(")");
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return builder.toString();
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} |
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} |
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@Override
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public CodeBuilder clone() throws CloneNotSupportedException { |
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// This implementation of CodeBuilder does not maintain state, so
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// we only call the super class.
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DefaultCodeBuilder other = (DefaultCodeBuilder) super.clone();
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return other;
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} |
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@Override
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public Constant constant(Object value) { |
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return new BaseConstant(value); |
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} |
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@Override
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public Identifier identifier(String name) { |
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return new BaseIdentifier(name); |
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} |
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@Override
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public Caller.Arguments args() {
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return new BaseArguments(); |
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} |
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@Override
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public Caller function(String name, int type, Arguments args) { |
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return new BaseCaller(name, type, args); |
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} |
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@Override
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public Caller function(String name, Arguments args) { |
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return function(name, Caller.FUNCTION, args);
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} |
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@Override
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public Caller operator(String name, Code arg1) { |
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Arguments args = args(); |
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((BaseArguments)args).add(arg1); |
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return function(name, Caller.UNARY_OPERATOR, args);
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} |
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@Override
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public Caller operator(String name, Code arg1, Code arg2) { |
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Arguments args = args(); |
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((BaseArguments)args).add(arg1); |
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((BaseArguments)args).add(arg2); |
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return function(name, Caller.BINARY_OPERATOR, args);
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} |
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@Override
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public Code not(Code op1) {
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return operator("not", op1); |
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} |
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@Override
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public Code add(Code op1, Code op2) {
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return operator("+", op1, op2); |
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} |
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@Override
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public Code subst(Code op1, Code op2) {
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return operator("-", op1, op2); |
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} |
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@Override
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public Code mult(Code op1, Code op2) {
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return operator("*", op1, op2); |
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} |
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@Override
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public Code div(Code op1, Code op2) {
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return operator("/", op1, op2); |
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} |
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@Override
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public Code mod(Code op1, Code op2) {
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return operator("%", op1, op2); |
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} |
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@Override
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public Code or(Code op1, Code op2) {
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return operator("or", op1, op2); |
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} |
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@Override
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public Code and(Code op1, Code op2) {
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return operator("and", op1, op2); |
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} |
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@Override
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public Code like(Code op1, Code op2) {
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return operator("like", op1, op2); |
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} |
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@Override
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public Code ilike(Code op1, Code op2) {
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return operator("ilike", op1, op2); |
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} |
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@Override
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public Code regexp(Code op1, Code op2) {
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return operator("~", op1, op2); |
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} |
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@Override
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public Code lt(Code op1, Code op2) {
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return operator("<", op1, op2); |
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} |
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@Override
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public Code gt(Code op1, Code op2) {
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return operator(">", op1, op2); |
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} |
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@Override
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public Code le(Code op1, Code op2) {
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return operator("<=", op1, op2); |
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} |
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@Override
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public Code ge(Code op1, Code op2) {
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return operator(">=", op1, op2); |
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} |
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@Override
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public Code eq(Code op1, Code op2) {
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return operator("=", op1, op2); |
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} |
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@Override
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public Code ne(Code op1, Code op2) {
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return operator("<>", op1, op2); |
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} |
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@Override
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public Code is(Code op1, Code op2) {
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return operator("is", op1, op2); |
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} |
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} |